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
2026 CHEVROLET EQUINOX EV
Service bulletins
124 bulletinsTechnical 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.
PIP4902W
Service Bulletin/Repair Instructions
This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
PIT6544
Service Bulletin/Repair Instructions
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.
PIT6503E
Service Bulletin/Repair Instructions
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.
PIT6541
Service Bulletin/Repair Instructions
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
PIT6503D
Service Bulletin/Repair Instructions
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.
PIC6551C
Service Bulletin/Repair Instructions
This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
PIC6656A
Service Bulletin/Repair Instructions
This Preliminary information communicates to the technician the direction needed when encounter a noise complaint for the rear disc brakes.
PIT6503C
Service Bulletin/Repair Instructions
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.
PIT6368D
Service Bulletin/Repair Instructions
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.
662.40
Over The Air
• 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 • Better performance and reliability of wireless phone charging
PIT6512A
Service Bulletin/Repair Instructions
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.
PIT6517C
Service Bulletin/Repair Instructions
This PI advise dealers If U3000 is present, follow the correct service doc by Symptom Byte before contacting PQC; if not present, verify the camera is clean, then contact PQC if no issue is found.
N252528241-01
Service Campaign
Certain vehicles listed above may have a condition in which the vehicle experiences a reduction in deceleration during a low-speed ABS braking event when the road surface transitions from smooth to rough surfaces. Dealers are to reprogram the Brake System Control Module. 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.
PIT5099J
Service Bulletin/Repair Instructions
PI to help diagnose A/C concern
662.30
Over The Air
• Additional protection for battery health and to help prevent battery drain • Improved charging messaging in the driver display • Improved vehicle diagnostics
662.50
Over The Air
• Improvements to system responsiveness • Improvements to camera image clarity • Fixes to prevent blank screens and audio drop-outs • Improvements to vehicle software update installation
N26-F172AJ
Over The Air
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. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior.
PIP6021D
Service Bulletin/Repair Instructions
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
Service Bulletin/Repair Instructions
This Preliminary information communicates an issue with an OTA pending message still displayed after an OTA event and how to reset/clear the message.
PIP6021C
Service Bulletin/Repair Instructions
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.
PIT6503B
Service Bulletin/Repair Instructions
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.
N25-252332
Over The Air
• Fixes to help prevent loss of functionality for connectivity features such as OnStar, Wi-Fi, Navigation, and Super Cruise.
PIT6426B
Service Bulletin/Repair Instructions
Fog lamp control may be missing from radio display after a BCM update. Engineering is investigating.
PIT6503A
Service Bulletin/Repair Instructions
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.
N262547330
Service Campaign
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
Service Bulletin/Repair Instructions
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.
661.40
Over The Air
• Reduces unnecessary service messages, check engine light activations, and OnStar calls from your vehicle.
PIT6426A
Service Bulletin/Repair Instructions
If a vehicle has an issue with super cruise inoperative tech is directed to follow a diagnostic path before replacing the Image processing module.
PIT6215C
Service Bulletin/Repair Instructions
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.
PIC6540J
Service Bulletin/Repair Instructions
This Preliminary information communicates to dealers a procedure to reset the radio.
PIT6393L
Service Bulletin/Repair Instructions
This Preliminary Information is to inform customers to follow diagnostics if resetting, disconnecting the module did not correct it.
PIC6423A
Service Bulletin/Repair Instructions
Pi created to provide GM dealers with information on gathering information for projection issue
PIC6540H
Service Bulletin/Repair Instructions
This Preliminary information communicates to dealers a procedure to reset the radio.
PIC6551B
Service Bulletin/Repair Instructions
This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
N262547330-01
Service Campaign
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
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
N252528241
Service Campaign
Certain vehicles may have a condition in which the vehicle experiences a reduction in deceleration during a low-speed ABS braking event when the road surface transitions from smooth to rough surfaces. Dealers are to reprogram the Brake System Control Module. 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.
PIC6540G
Service Bulletin/Repair Instructions
This Preliminary information communicates to dealers a procedure to reset the radio.
PIT6393K
Service Bulletin/Repair Instructions
This Preliminary Information is to inform customers to follow diagnostics if resetting, disconnecting the module did not correct it.
PIC6629D
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
661.10
Over The Air
• 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. • Fixes to help prevent erroneous missing key messages on driver display. • Fixes for accuracy of low tire pressure alert. • Fixes for speed threshold for pedestrian alerts. • Improves traction and stability control when accelerating or on uneven terrain. • Improves braking and stopping performance on low-traction surfaces. • Improves the performance of assisted braking features.
661.20
Over The Air
•Fixes to help ensure successful vehicle software updates.
PIT6503
Service Bulletin/Repair Instructions
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.
PIT3271Q
Service Bulletin/Repair Instructions
This preliminary information communicates information about how to determine if a wheel and tires size change is available.
PIT6368C
Service Bulletin/Repair Instructions
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.
N252528650-01
Service Campaign
Certain vehicles listed above may have a condition in which water is present in the passenger footwell compartment. Dealers will inspect the A/C Drain Hose connection and footwell seam sealers. If water is present, refer to 25-NA-149.
PIT6413A
Service Bulletin/Repair Instructions
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.
654.40
Over The Air
• Improvements to the performance of Brake Assist. • Fixes to help ensure proper Super Cruise lane change functionality.
N252521591-04
Service Bulletin/Repair Instructions
Certain vehicles listed above may have a condition in which hard braking may unexpectedly engage. Dealers will re-program the IPM or Front View Camera depending on what the vehicle is equipped with.
PIP4902V
Service Bulletin/Repair Instructions
This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
PIP6104
Service Bulletin/Repair Instructions
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
Service Bulletin/Repair Instructions
This Preliminary Information is to inform customers to follow diagnostics if resetting, disconnecting the module did not correct it.
PIC6629C
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
PIT6394E
Service Bulletin/Repair Instructions
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
Service Campaign
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
Service Bulletin/Repair Instructions
This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC'ss
PIT6394D
Service Bulletin/Repair Instructions
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
Service Bulletin/Repair Instructions
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.
PIT6436C
Service Bulletin/Repair Instructions
This Preliminary Information is to inform dealer technicians to not replace anything at this time in regards to this concern. The vehicle is still safe to drive with no other issues.
PIT6394C
Service Bulletin/Repair Instructions
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.
PIT6436B
Service Bulletin/Repair Instructions
This Preliminary Information is to inform dealer technicians to not replace anything at this time in regards to this concern. The vehicle is still safe to drive with no other issues.
N252521591-03
Service Campaign
Certain vehicles listed above may have a condition in which hard braking may unexpectedly engage. Dealers will re-program the IPM or Front View Camera depending on what the vehicle is equipped with.
N252521591-02
Service Campaign
Certain vehicles listed above may have a condition in which hard braking may unexpectedly engage. Dealers will reprogram the Image Processing Module.
PIT6482
Service Bulletin/Repair Instructions
This preliminary information is to communicate to technicians that a sequence in programming has changed for these vehicles with this RPO. Failure to follow this sequence will result in a reversed, reverse camera image and cannot be corrected once programmed.
654.20
Over The Air
• 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. • Fixes to help ensure successful vehicle software updates.
654.30
Over The Air
• 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
Over The Air
• 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.
PIC6638A
Service Bulletin/Repair Instructions
This Preliminary information communicates to the technician the repair direction needed to address an inaccurate speed limit sign displayed on instrument cluster.
PIC6638
Service Bulletin/Repair Instructions
This Preliminary information communicates to the technician the repair direction needed to address an inaccurate speed limit sign displayed on instrument cluster.
PIP6099A
Service Bulletin/Repair Instructions
This P/I is advising that the TCM should not be replaced for DTC P16F4 and to follow the repair instructions.
PIT5985K
Service Bulletin/Repair Instructions
This PI provides diagnostics tips to dealership techs when trying to diagnose a CAN Bus communication issue after an event like a lightning strike, battery jump started backwards, failure over the air update, etc.
PIP6099
Service Bulletin/Repair Instructions
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.
PIT6425C
Service Bulletin/Repair Instructions
This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC's
PIT6471
Service Bulletin/Repair Instructions
This Preliminary Information is to inform technicians to not replace any parts at this time and to use the work around provided. When a fix is available, this PI will be updated to a bulletin.
PIP6098
Service Bulletin/Repair Instructions
This PI advised dealer technicians of possible causes of diesel fuel contamination in gasoline powered vehicles and advises of warranty direction.
PIT6436A
Service Bulletin/Repair Instructions
This Preliminary Information is to inform dealer technicians to not replace anything at this time in regards to this concern. The vehicle is still safe to drive with no other issues.
PIT6457B
Service Bulletin/Repair Instructions
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.
PIP4902U
Service Bulletin/Repair Instructions
This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
PIC6540F
Service Bulletin/Repair Instructions
This Preliminary information communicates to dealers a procedure to reset the radio.
PIT6445B
Service Bulletin/Repair Instructions
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.
PIC6629B
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
PIT6457A
Service Bulletin/Repair Instructions
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
Service Bulletin/Repair Instructions
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.
PIT5214G
Service Bulletin/Repair Instructions
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.
PIT6454
Service Bulletin/Repair Instructions
This preliminary information discusses a possibility of the fasteners for the underbody panel coming loose and making a noise.
PIC6629A
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
PIP5981G
Service Bulletin/Repair Instructions
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
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
PIP6021B
Service Bulletin/Repair Instructions
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
Service Bulletin/Repair Instructions
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.
PIT6425B
Service Bulletin/Repair Instructions
This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC's
PIT6425A
Service Bulletin/Repair Instructions
This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC's
PIT6440
Service Bulletin/Repair Instructions
The Driver Information Center may display a message of Transport Mode On after the ignition is cycled.
PIT6411B
Service Bulletin/Repair Instructions
This information provides software update information for the K73 Telematics module to correct the symptoms described.
PIT6439
Service Bulletin/Repair Instructions
This preliminary information states corrective measures for an over cancelling turn signal switch.
PIT6426
Service Bulletin/Repair Instructions
If a vehicle has an issue with super cruise inoperative tech is directed to follow a diagnostic path before replacing the Image processing module.
13598
Other
New Vehicle Monitoring Programs Section in IVH
PIT6431
Service Bulletin/Repair Instructions
This preliminarily information communication an issue with the supercruise dropping out when next to a merging lane and engineering is investigating.
18-NA-180
Service Bulletin/Repair Instructions
This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and Transaction Submission information.
PIT6411A
Service Bulletin/Repair Instructions
This information provides software update information for the K73 Telematics module to correct the symptoms described.
PIT6236B
Service Bulletin/Repair Instructions
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.
PIT6423
Service Bulletin/Repair Instructions
Diagnostic Guidance for U3000-97 Long Range Radar Blocked
PIT6368B
Service Bulletin/Repair Instructions
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
Service Bulletin/Repair Instructions
This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
PIT6059C
Service Bulletin/Repair Instructions
This Preliminary information communicates an issue with super cruise unavailable due to the driver's monitoring camera and dealers to replace the camera.
PIC5650M
Service Bulletin/Repair Instructions
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.
PIP6031C
Service Bulletin/Repair Instructions
This PI addresses leaks from the case half and provides repair direction to dealer technicians
PIP5601B
Service Bulletin/Repair Instructions
This PI communicates the requirement to provide a pico file to receive diagnostic assistance from TAC.
PIT5074S
Service Bulletin/Repair Instructions
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.
PIT6274C
Service Bulletin/Repair Instructions
This preliminary information PI states to not replace anything at the dealership for this concern and engineering is investigating.
PIT6411
Service Bulletin/Repair Instructions
This information provides software update information for the K73 Telematics module to correct the symptoms described.
PIC6086J
Service Bulletin/Repair Instructions
This PI communicates a procedure to clean oil leaking from the rain sensor.
PIT6180A
Service Bulletin/Repair Instructions
This Preliminary information communicates assistance in locating the Rear seat belt comfort guides in the parts catalog.
PIP4902S
Service Bulletin/Repair Instructions
This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
25-NA-156
Service Bulletin/Repair Instructions
This service bulletin provides information on Tire Sidewall Irregularities.
PIT5074R
Service Bulletin/Repair Instructions
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
Service Bulletin/Repair Instructions
This Preliminary information communicates an issue with an OTA pending message still displayed after an OTA event and how to reset/clear the message.
25-NA-118
Service Bulletin/Repair Instructions
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.
22-NA-242
Service Bulletin/Repair Instructions
This warranty administration bulletin provides information for dealers/technicians on System Reset and Connector Reconnect Labor Code Numbers.
07-00-89-037W
Service Bulletin/Repair Instructions
This warranty administration bulletin provides policy information for GM courtesy transportation and roadside assistance programs.
25-NA-087
Service Bulletin/Repair Instructions
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
Service Bulletin/Repair Instructions
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
Service Bulletin/Repair Instructions
This informational bulletin instructs the tech when fuel/fluid is needed to be tested and where it can be sent for analysis.
Reading this report
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.