PIC6629F
Service Bulletin/Repair Instructions
This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC display
Vehicle report
Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
PIC6629F
This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC display
PIP4902W
This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
PIT6544
This preliminary information is to inform technicians and customers that GM is aware of the issue and the vehicle can still be driven. When a repair is available, this PI will be updated.
PIT6533B
This Preliminary information communications information on a Short Range Radar software anomaly causing false / ghost left or right side object detection alerts.
PIT6541
This Preliminary information communicates to the technicians a diagnostic tip if a technician loses communication with the image processor #2 and how to restore communication
PIC6551C
This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
PIT6533A
This Preliminary information communications information on a Short Range Radar software anomaly causing false / ghost left or right side object detection alerts.
PIT6368D
This Preliminary information communicates an issue with the virtual garage door opener not programming to a garage opener. Engineering is working on a new module.
PIC6658
This preliminary information informs customers and technicians of the short term work around to restore the proper Themes operation. No parts should be replaced at this time.
PIT6512A
This PI states that if SDGM DTC P0604/P0607 is set and no other SDGM DTCs are present, clear DTCs and reset the SDGM. Advises of how to contact PQC to authorize SDGM replacement.
PIT6446A
This PI Communicates information to ensure Memory Recall is enabled to ensure memory mirrors return to set position after curbview assist is used.
662.60
• Improvements to Super Cruise disengagement alerts. • Improvements to the availability of Super Cruise. • Improvements to driver attention monitoring to help reduce unnecessary OnStar escalation calls. • Improvements to Super Cruise lane merging performance. • Improvements to the responsiveness of rear view camera display. • Improvements to the performance of Brake Assist. • Fixes to help ensure proper Super Cruise lane change functionality. •Improved visuals for Lane Keep Assist feature
PIT5099J
PI to help diagnose A/C concern
662.20
• Additional protection for battery health and to help prevent battery drain • Improved charging messaging in the driver display • Improved vehicle diagnostics • Surround Vision Recorder, a new feature that allows you to record, watch, and save video from your vehicle's cameras. • Security Recording, a new feature that can automatically begin recording if your vehicle's alarm is triggered while it is parked. • Cabin Glance, a new feature that displays a live feed of the seating area on your infotainment screen. This allows you to check on passengers, such as kids or pets. • Fixes to help ensure responsiveness for the driver display and rear view camera. • Improvements to reliability for alerts and chimes.
662.40
• Additional protection for battery health and to help prevent battery drain • Improved charging messaging in the driver display • Improved vehicle diagnostics
662.50
• Improved vehicle performance when driving in Reverse on slippery surfaces • Better One-Pedal Driving performance • Additional protection for battery health and prevention for battery drain • Improved accuracy for driver display messages
PIP6021D
This Preliminary Information communicates that, under certain conditions, a MIL (Malfunction Indicator Lamp) illumination or a "Service High Voltage" message may display on the IPC (Instrument Panel Cluster), and the 12V battery may experience discharge.
PIT5966F
This Preliminary information communicates an issue with an OTA pending message still displayed after an OTA event and how to reset/clear the message.
PIC6552G
This Preliminary information communicates how to recover the Image Processing Module.
PIP6021C
This Preliminary Information communicates that, under certain conditions, a MIL (Malfunction Indicator Lamp) illumination or a "Service High Voltage" message may display on the IPC (Instrument Panel Cluster), and the 12V battery may experience discharge.
N25-252332
• Fixes to help prevent loss of functionality for connectivity features such as OnStar, Wi-Fi, Navigation, and Super Cruise.
PIP6103C
This PI explains that the T18, Battery charger drive power distribution control modules are on parts restriction thru TAC.
PIT6426B
Fog lamp control may be missing from radio display after a BCM update. Engineering is investigating.
PIT6503A
This preliminary information is to inform technicians that GM is placing the B174W Front View Camera Module (ACP2) on part restriction due to elevated replacement rates and ongoing engineering investigation. Technicians must not replace the front camera module unless they have: 1.Completed the diagnostic procedure in this PI, and 2.Contacted TAC and received authorization, including the SI document number and specific step that directs camera replacement.
661.40
• Improvements to diagnostics and service messaging for battery health, particularly in humid conditions. • Improvements to transmission diagnostics used for shifting. • Improvements to charging system diagnostics. • Fixes to help protect EV adapter from overheating while charging. • Reduces unnecessary service messages, check engine light activations, and OnStar calls from your vehicle.
N262547330
Certain vehicles may have a condition in which the Telematic Control Module may enter an unrecoverable state. Dealers are to reprogram the Telematic Control Module. IMPORTANT: The module may be several software versions behind and could take multiple programming events to bring it to the latest software level (The same calibration screen MUST be displayed to validate the module has been programmed to the latest level). Owners who have accepted applicable terms and conditions will have the opportunity to accept these software changes using wireless over-the-air (OTA) technology without having to bring their vehicle to a dealership. Alternatively, owners may have their vehicle serviced at a GM dealer to receive these software updates.
PIT6519
This preliminary information is to inform technicians and customers that the voice command will be inoperative when trying to open applications. Engineering is investigating and this PI will be converted to a bulletin when a repair is available.
PIC6639B
This PI details a possible issue with the heads up display being inop, due to a possible software anomaly.
PIT6426A
If a vehicle has an issue with super cruise inoperative tech is directed to follow a diagnostic path before replacing the Image processing module.
PIC6652
This PI Communicates that a grind noise maybe heard if the spring plate is not transferred to the new sunroof/shade motor.
PIT6215C
This Preliminary information communicates to dealership technicians that if they encounter a customer vehicle with this concern, to perform the steps listed and should be able to reprogram the module and correct this.
PIP6103B
This PI explains that the T18, Battery charger drive power distribution control modules are on parts restriction thru TAC.
PIC6540J
This Preliminary information communicates to dealers a procedure to reset the radio.
PIC6651
This preliminary information is to inform technicians and customers to not replace anything at this time and engineering is investigating the OTA concern that caused this.
PIT6393L
This Preliminary Information is to inform customers to follow diagnostics if resetting, disconnecting the module did not correct it.
PIC6423A
Pi created to provide GM dealers with information on gathering information for projection issue
PIC6540H
This Preliminary information communicates to dealers a procedure to reset the radio.
PIC6551B
This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
PIP6103A
This PI explains that the T18, Battery charger drive power distribution control modules are on parts restriction thru TAC.
N262547330-01
Certain vehicles may have a condition in which the Telematic Control Module may enter an unrecoverable state. Dealers are to reprogram the Telematic Control Module. IMPORTANT: The module may be several software versions behind and could take multiple programming events to bring it to the latest software level (The same calibration screen MUST be displayed to validate the module has been programmed to the latest level). Owners who have accepted applicable terms and conditions will have the opportunity to accept these software changes using wireless over-the-air (OTA) technology without having to bring their vehicle to a dealership. Alternatively, owners may have their vehicle serviced at a GM dealer to receive these software updates.
PIC6629E
This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC display
PIC6566C
This Preliminary information communicates to dealership technicians to perform the reset for the 2 modules noted above.
PIC6540G
This Preliminary information communicates to dealers a procedure to reset the radio.
PIC6580A
This Preliminary information communicates a condition my exist causing a service theft alarm message.
661.30
• Improvements to Super Cruise disengagement alerts. • Improvements to the availability of Super Cruise. • Improvements to driver attention monitoring to help reduce unnecessary OnStar escalation calls. • Improvements to Super Cruise lane merging performance. • Improvements to the responsiveness of rear view camera display. • Improvements to the performance of Brake Assist. • Fixes to help ensure proper Super Cruise lane change functionality. • Improvements to the performance of Automatic Emergency Braking and Adaptive Cruise Control braking. • Fixes to help ensure proper functionality of Forward Collision Alert and availability of driver assistance features.
PIT6393K
This Preliminary Information is to inform customers to follow diagnostics if resetting, disconnecting the module did not correct it.
PIC6629D
This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC display
661.20
• Surround Vision Recorder, a new feature that allows you to record, watch, and save video from your vehicle's cameras. • Security Recording, a new feature that can automatically begin recording if your vehicle's alarm is triggered while it is parked. • Cabin Glance, a new feature that displays a live feed of the seating area on your infotainment screen. This allows you to check on passengers, such as kids or pets. • Fixes to help ensure responsiveness for the driver display and rear view camera. • Improvements to reliability for alerts and chimes.
PIC6485F
This Preliminary information communicates that the upper compressor mount could be twisted causing a vibration or noise concern while the compressor is running.
661.10
• The head-up display will now be less likely to experience any loss of image. • Fixes to help ensure successful vehicle software updates. • Improvements to the performance of electric vehicle sound enhancement. • Fixes to help prevent loss of functionality for Dolby Atmos. • Fixes to ensure proper audio options display in menu.
PIT6503
This preliminary information is to inform technicians that GM is placing the B174W Front View Camera Module (ACP2) on part restriction due to elevated replacement rates and ongoing engineering investigation. Technicians must not replace the front camera module unless they have: 1.Completed the diagnostic procedure in this PI, and 2.Contacted TAC and received authorization, including the SI document number and specific step that directs camera replacement.
PIC6639A
This PI details a possible issue with the heads up display being inop, due to a possible software anomaly.
PIT3271Q
This preliminary information communicates information about how to determine if a wheel and tires size change is available.
PIT6368C
This Preliminary information communicates an issue with the virtual garage door opener not programming to a garage opener. Engineering is working on a new module.
PIT6413A
This preliminary information is for technicians that will have this message after USB updating the radio. The repair should not involve replacing a module as pressing the reset button will correct this issue.
PIP4902V
This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
PIP6104
This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.
PIT6393J
This Preliminary Information is to inform customers to follow diagnostics if resetting, disconnecting the module did not correct it.
PIC6629C
This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC display
PIT6394E
A vehicle may have a service driver assist message and the technician cannot get the Long Range Radar learn procedure to complete. Tech is directed to drive a city route to complete the procedure.
N252541510
Certain vehicles may have been sold with a GM NACS Level 2 EV charging adapter (NACS to J1772) in which a quality issue was identified. Dealers are to provide the customer with the latest design charging adapter.
PIT6425D
This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC'ss
PIT6394D
A vehicle may have a service driver assist message and the technician cannot get the Long Range Radar learn procedure to complete. Tech is directed to drive a city route to complete the procedure.
PIP6043B
This Preliminary Information communicates the steps on diagnosing certain EV vehicles with a blank IPC screen, no charge or start concerns. Information includes steps to resolve for various symptoms are provided to the dealership technician.
PIT6456D
This preliminary information communicates an issue with the key fob buttons inoperative and how to resync the fobs back to the vehicle.
PIT6394C
A vehicle may have a service driver assist message and the technician cannot get the Long Range Radar learn procedure to complete. Tech is directed to drive a city route to complete the procedure.
PIC6642A
This PI communicates a possible concern with the customer experiencing a service headlamp message on startup and DTC's B1B5F SYM49 and/or B1B60 SYM49 maybe found current or history.
PIT6456C
This preliminary information communicates an issue with the key fob buttons inoperative and how to resync the fobs back to the vehicle.
654.40
• Improvements to the infotainment system from Android update. This Android update removes Alexa Built-in (if supported). Google Assistant will remain available. • Fixes to improve responsiveness for the center display, driver display, and camera. • Fixes for Apple CarPlay functionality and connectivity (if supported). • Fixes to help ensure proper functionality for Bluetooth. • Improvements to audio system performance.
PIC6642
This PI communicates a possible concern with the customer experiencing a service headlamp message on startup and DTC's B1B5F SYM49 and/or B1B60 SYM49 maybe found current or history.
PIT6456B
This preliminary information communicates an issue with the key fob buttons inoperative and how to resync the fobs back to the vehicle.
PIC6638
This Preliminary information communicates to the technician the repair direction needed to address an inaccurate speed limit sign displayed on instrument cluster.
PIC6639
This PI details a possible issue with the heads up display being inop, due to a possible software anomaly.
PIP6099A
This P/I is advising that the TCM should not be replaced for DTC P16F4 and to follow the repair instructions.
PIT6478
This Preliminary information communicates to the field about a normal condition about a message that appears when using a NFC card to start the vehicle when a key fob or a digital key device is not present.
N252494250-01
Certain vehicles listed above may be missing relevant information regarding the use of snow chains, snow socks, or other traction devices from the Owner’s Manual. Vehicle owners will be mailed an owner’s manual insert to include with other important printed material in the glovebox. For vehicles currently on dealer lots, dealers will include the insert prior to delivery.
PIC6511C
This Preliminary information communicates that a front license plate frame may cause interference with the park assist sensors.
PIP6099
This P/I is advising that the TCM should not be replaced for DTC P16F4 and to request FSE assistance for a TCM data pull.
PIT6456A
This preliminary information communicates an issue with the key fob buttons inoperative and how to resync the fobs back to the vehicle.
654.30
•Improvements to help protect battery health in low temperatures. •Improvements to diagnostics to reduce service messages. •Fixes to help protect battery health in high temperatures. •Fixes to improve responsiveness for vehicle diagnostics.
654.50
• Fixes for active cabin ventilation. • Fixes to help ensure proper functionality for heating and cooling features. • Improvements to night mode lights for shifting gears. • Fixes for Daytime Running Lamps turning on when set to Off. • Improvements to the performance of electric vehicle sound enhancement. • Fixes to help prevent loss of functionality for Dolby Atmos. • Fixes to ensure proper audio options display in menu. •Fixes to help ensure accurate driver display messages and alerts.
PIT6425C
This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC's
PIP6098
This PI advised dealer technicians of possible causes of diesel fuel contamination in gasoline powered vehicles and advises of warranty direction.
PIT6457B
This preliminary information is for technicians that may see DTCs that are history and should not perform any part replacements. They should follow the notes mentioned prior to anything being replaced.
PIC6566B
This Preliminary information communicates to dealership technicians to perform the reset for the 2 modules noted above.
PIP4902U
This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
PIC6540F
This Preliminary information communicates to dealers a procedure to reset the radio.
654.20
•This update will allow you to enable digital key with the myCadillac mobile app. •Digital key is a new feature that lets you lock, unlock, and start your vehicle using your smartphone or smartwatch. This feature allows for convenient vehicle access without a key fob. •For more information, refer to the Cadillac support site. •Digital key requires a compatible device and active OnStar service plan. See onstar.com for details and limitations. •Fixes for active cabin ventilation. •Fixes to help ensure your vehicle can recognize the key when using digital key. •Improvements to the performance of vehicle software updates. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle. Do not service your vehicle during installation.
PIT6445B
This PI communicates information that the Collision / Detection Systems will revert to default setting of Alert and Brake after an Ignition Cycle due to an Engineering change.
PIC6578D
This Preliminary information communicates procedure to relearn window motor when it reverses when expressing up.
PIT6465A
This preliminary information communicates an issue with the DRL LED strips flickering and dealer are to replace the lighting control module.
PIC6629B
This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC display
PIT6457A
This preliminary information is for technicians that may see DTCs that are history and should not perform any part replacements. They should follow the notes mentioned prior to anything being replaced.
PIT6457
This preliminary information is for technicians that may see DTCs that are history and should not perform any part replacements. They should follow the notes mentioned prior to anything being replaced.
PIT6456
This preliminary information communicates an issue with the key fob buttons inoperative and how to resync the fobs back to the vehicle.
PIT5214G
This Preliminary Information communication provides information to the technician about vehicles that have had multiple repair attempts that are being performed on customer’s vehicles that exhibit vibration conditions without utilizing the support of General Motors Technical Assistance Center. If valid vibration frequency or Road Force Variation data has been collected and a repair attempt does not correct the customer complaint, contact General Motors Technical Assistance Center for further support. For any vehicles that remains unrepaired after being at the dealer for three days or more and a related bulletin or PI is not found, contact General Motors Technical Assistance Center for further support.
PIC6629A
This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC display
PIP5981G
This Preliminary information communicates ordering process for the front and rear drive units are on restriction for all listed EV vehicles for engineering review.
PIC6629
This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC display
PIC6485E
This Preliminary information communicates that the upper compressor mount could be twisted causing a vibration or noise concern while the compressor is running.
PIC6537D
This Preliminary information communicates that a noise or vibration maybe heard from the A/C compressor and that Engineering is working on a resolution.
PIT6446
This PI Communicates information to ensure Memory Recall is enabled to ensure memory mirrors return to set position after curbview assist is used.
PIP6021B
This Preliminary Information communicates that, under certain conditions, a MIL (Malfunction Indicator Lamp) illumination or a "Service High Voltage" message may display on the IPC (Instrument Panel Cluster), and the 12V battery may experience discharge.
PIT6445A
This PI communicates information that the Collision / Detection Systems will revert to default setting of Alert and Brake after an Ignition Cycle due to an Engineering change.
654.10
Fixes to help prevent loss of functionality for OnStar, infotainment apps, and connectivity features. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle.
PIC6485D
This Preliminary information communicates that the upper compressor mount could be twisted causing a vibration or noise concern while the compressor is running.
PIT6425B
This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC's
PIT6425A
This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC's
PIC6621
This PI addresses a possible roll up then down window message.
PIT6440
The Driver Information Center may display a message of Transport Mode On after the ignition is cycled.
PIT6411B
This information provides software update information for the K73 Telematics module to correct the symptoms described.
PIC6607B
This Preliminary information communicates not to replace the Image processing Module if the following DTC's are history - U3000 SYM49, U1624, U0140, U023B SYM00, U053C, B1DD SYM57.
PIT6424B
A vehicle may come in with B3A6B set in history. Tech is directed to clear code and advise the customer an OTA will be released for the code.
13598
New Vehicle Monitoring Programs Section in IVH
PIC6607A
This Preliminary information communicates not to replace the Image processing Module if the following DTC's are history - U3000 SYM49, U1624, U0140, U023B SYM00, U053C, B1DD SYM57.
PIT6431
This preliminarily information communication an issue with the supercruise dropping out when next to a merging lane and engineering is investigating.
PIT6424A
A vehicle may come in with B3A6B set in history. Tech is directed to clear code and advise the customer an OTA will be released for the code.
18-NA-180
This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and Transaction Submission information.
PIC6617
PI is created to advise dealer of an issue that may have been induced by OTA programming
N252494250
Certain vehicles may be missing relevant information regarding the use of snow chains, snow socks, or other traction devices from the Owner’s Manual. Vehicle owners will be mailed an owner’s manual insert to include with other important printed material in the glovebox. For vehicles currently on dealer lots, dealers will include the insert prior to delivery.
PIT6236B
This Preliminary information communicates the active safety features and/or cameras are inoperative or unavailable after a 12 volt battery replacement or battery charge after a low voltage condition.
PIT6424
A vehicle may come in with B3A6B set in history. Tech is directed to clear code and advise the customer an OTA will be released for the code.
PIT6423
Diagnostic Guidance for U3000-97 Long Range Radar Blocked
PIT6368B
This Preliminary information communicates an issue with the virtual garage door opener not programming to a garage opener. Engineering is working on a new module.
PIP4902T
This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
PIT6059C
This Preliminary information communicates an issue with super cruise unavailable due to the driver's monitoring camera and dealers to replace the camera.
PIC5650M
This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3060, B3935, C0750, C0755, C0760, C0765, and/or C0775.
PIT6413
This preliminary information is for technicians that will have this message after USB updating the radio. The repair should not involve replacing a module as pressing the reset button will correct this issue.
PIP5601B
This PI communicates the requirement to provide a pico file to receive diagnostic assistance from TAC.
PIT5074S
This Preliminary Information communication provides information to the technician about the use of J-35616-64B and Mini 50 terminal test probe, replacement terminals, and terminated leads.
PIT5832V
This Preliminary information communicates a diagnostic tip on how to resolve a issue if the serial data authentication configuration did not complete correctly.
N24-F172AE
Great News! Your vehicle keeps getting better. This update contains a required software change to help improve the overall software update and diagnostics process. Be sure to install this update to be able to receive future software updates. Better Never Stops™ During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle. Do not service your vehicle during installation.
N25-250322 (652.10)
•Improvements to Apple CarPlay performance. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle. Do not service your vehicle during installation.
PIT6401
This Preliminary information communicates a diagnostic tip on how to resolve a issue of the horn sounding when vehicle doors are being closed and the key in vehicle reminder set to off.
PIT6180A
This Preliminary information communicates assistance in locating the Rear seat belt comfort guides in the parts catalog.
PIP4902S
This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
25-NA-156
This service bulletin provides information on Tire Sidewall Irregularities.
PIT5074R
This Preliminary Information communication provides information to the technician about the use of J-35616-64B and Mini 50 terminal test probe, replacement terminals, and terminated leads.
PIT5966E
This Preliminary information communicates an issue with an OTA pending message still displayed after an OTA event and how to reset/clear the message.
PIT6384
This preliminary information is for service technicians who come across this concern to verify the operation in GDS2 and that engineering is aware of this issue and this PI will be updated to a bulletin once a determination has been made.
25-NA-128
This service bulletin provides a service procedure to correct a customer concern of Grind, Groan and/or Rubbing Type Noise Coming from Front of Vehicle During Braking Hard (High Deceleration).
PIC6607
This Preliminary information communicates not to replace the Image processing Module if the following DTC's are history - U3000 SYM49, U1624, U0140, U023B SYM00, U053C, B1DD SYM57.
25-NA-118
This service bulletin provides information for the technicians to use a Customer Concern Verification sheet to facilitate the questions needing to be answered by the customer regarding Automatic Emergency Braking (AEB) issues.
24-NA-143
This service bulletin provides information for dealers/technicians on Software Updates on Ultium Vehicles.
22-NA-242
This warranty administration bulletin provides information for dealers/technicians on System Reset and Connector Reconnect Labor Code Numbers.
24-NA-113
This service bulletin provides information for dealers/technicians on Vehicle Wide Programming Instructions.
07-00-89-037W
This warranty administration bulletin provides policy information for GM courtesy transportation and roadside assistance programs.
25-NA-087
This service bulletin provides information on the proper Reflective High Temperature Heat and/or Insulating Tape to use for certain repairs, such as Wiring Harness Repairs.
13-08-116-001K
The intent of this service bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other diagnostic methods to identify them.
25-NA-065
This informational bulletin instructs the tech when fuel/fluid is needed to be tested and where it can be sent for analysis.
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.