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.
PIT-5338
Service Bulletin/Repair Instructions
GMC/CADILLAC/CHEVROLET: SOME VEHICLES ARE EXPERIENCING, AFTER A COLD SOAK IN COLD TEMPERATURES, LOSS OF 12 VOLT BATTERY POWER, INDICATOR CHARGING SYSTEM LAMP ON, NO POWER STEERING ASSIST AND DRIVER INFORMATION CENTER (DIC) DISPLAYING POWER STEERING MESSAGE. MODEL 2008-13 TAHOE, SILVERADO HYBRIDS, ESCALADE HYBRID, SIERRA, YUKON HYBRIDS. *PE
PI-1191
Service Bulletin/Repair Instructions
GM: IMMEDIATELY AFTER START AFTER A COLD SOAK IN COLD AMBIENT TEMPERATURES, DISPLAYED MESSAGES SERVICE POWER STEERING AND SERVICE HYBRID SYSTEM. MAKE: CADILLAC/CHEVROLET/GMC MODELS: HYBRIDS ESCALADE/TAHOE/SILVERADO/SIERRA/YUKON MODEL YEARS 2009-2013 *JS
PI-0018-B
Service Bulletin/Repair Instructions
GENERAL MOTORS: THE WINDOWS, FRONT AND REAR, WOULD BIND, POOR FIT, MISALIGNMENT, MAKES RATTLE OR SQUEAKING NOISES, MOVES SLOWLY AND IS INOPERATIVE. MODEL 2008-2014 VEHICLES AND TRUCKS. *PE
PIT-4821-C
Service Bulletin/Repair Instructions
GENERAL MOTORS: HYBRID BATTERY PARTS RESTRICTION FOR HIGH VOLTAGE 2-MODE BATTERY PARTS. *KB
PIP-4966
Service Bulletin/Repair Instructions
CHEVROLET/CADILLAC/GMC: CERTAIN VEHICLES EXPERIENCING ERRATIC OR INOPERATIVE SPEEDOMETER OR ANTI-LOCK BRAKE SYSTEM MESSAGE OR MALFUNCTIONING INDICATOR LIGHT DISPLAYING IN DRIVER'S INFORMATION CENTER. *PE UPDATED 08/5/2013 *JS
PIP5015
Service Bulletin/Repair Instructions
GM: CLICK TICK WHIRL NOISE FROM REAR AXLE. THE NOISE MAY BE PRESENT ON ACCELERATION, DECELERATION, OR WHEN THERE IS A TORQUE REVERSAL IN THE DRIVE-LINE (ACCELERATION TO DECELERATION). ALSO INCLUDED ESCALADE HYBRID MODEL YEARS 2008/2010/2011/2012. MODEL TAHOE HYBRID MODEL YEARS 2010-2012. MODEL SILVERADO HYBRID MODEL YEARS 2010-2012. MODEL YUKON HYBRID MODEL YEARS 2010-2012. MODEL SIERRA HYBRID MODEL YEAR 2010-2012. *JS
PIT-3749D
Service Bulletin/Repair Instructions
GM: ON SOME TRUCK MODELS THERE IS SOME FRAME CORROSION. *RM UPDATED ON 5/2/2012. *KB
08-07-30-021G
Service Bulletin/Repair Instructions
GM: LOSS OF HIGH SPEED GMLAN COMMUNICATIONS, INTERMITTENT NO CRANK, IP GAGE FLUCTUATION, INTERMITTENT DOOR LOOK CYCLING, INTERMITTENT CHIME OPERATION, VARIOUS IP WARNING LAMPS ILLUMINATED, TRANSMISSION MAY NOT SHIFT, COMMUNICATION DTCS U0073, U0100, U0101, U0102 U0121 OR U0140 SET (REPAIR TERMINALS IN TRANSMISSION HARNESS CONNECTOR, REPAIR OPEN OR SHORTED GM HIGH SPEED LAN CIRCUITS, OPEN OR SHORTED DATA LINK RESISTOR, CORROSION OR POOR CONNECTIONS IN VARIOUS CONTROL MODULE CONNECTORS). *JS
SB-09-06-03-004A
Service Bulletin/Repair Instructions
GM/HUMMER/SAAB: INTERMITTENT ILLUMINATION OF MIL, SERVICE LAMPS, SERVICE MESSAGES, OR DTC SET BY VARIOUS CONTROL MODULES-DIAGNOSING AND REPAIRING FRETTING CORROSION (DISCONNECT AFFECTED CONNECTOR AND APPLY DIELECTRIC LUBRICANT). *PE UPDATED 3/26/10. *PE UPDATED 6/6/11. *PE UPDATED 3/12/12. *PE
05-09-40-002E
Service Bulletin/Repair Instructions
GM: SERVICE BULLETIN EXPLAINING WHEN THE SAFETY BELTS ARE SUPPOSED TO LOCK. *RM UPDATED 12/6/11. *PE
PIT-4597
Service Bulletin/Repair Instructions
(HYBRID) ADDITIONAL INFORMATION ON BLEEDING THE BRAKES. WITH RPO HP2. *NJ UPDATED 6/27/11. *PE
PIT-4858
Service Bulletin/Repair Instructions
GENERAL MOTORS: HYBRID BRAKE NOISE OR VIBRATION. BRAKES GROAN OR THUMP NOISES DURING BRAKING; BRAKE PEDAL PUSHBACK OR VIBRATION THAT MAY RESEMBLE A PULSATION AS THE VEHICLE COMES TO A STOP; A SLIGHT DROP IN THE BRAKE PEDAL WHEN COMING TO A STOP. *PE UPDATED 6/27/11. *PE
PIT-4808D
Service Bulletin/Repair Instructions
CADILLAC/CHEVROLET/GMC: ON RARE OCCASIONS, A VEHICLE MAY STALL AND A SES LIGHT MAY SET ACCOMPANIED BY ONE OR ALL OF THE FOLLOWING CODES, P061B; P0AFA; P0BBD. IN MOST CASES THE VEHICLE WILL RESTART, BUT THE SES LAMP WILL REMAIN ILLUMINATED AND THE DIC MAY DISPLAY SERVICE HYBRID SYSTEM MESSAGE. *PE UPDATED 11/24/09. *PE UPDATED 3/15/10. *PE UPDATED ON 06/24/2011. *KB
PIT-5043
Service Bulletin/Repair Instructions
GM: ON SOME HYBRID VEHICLES AFTER UPDATING SOFTWARE THERE IS AN INTERNAL TROUBLE CODE STORED AND IT WON'T GO AWAY. *RM
SB-02-06-04-0371
Service Bulletin/Repair Instructions
CHEVROLET/GMC: CHECK ENGINE LIGHT ON, FUEL TANK HARD TO FILL, DTCS P0442, P0446, P0455 OR P0449 SET (REPLACE EVAPORATIVE EMISSION (EVAP) VENT VALVE SOLENOID ASSEMBLY AND ADD/RELOCATE FILETER BOX USING SERVICE KIT). *PE
PIP-4489E
Service Bulletin/Repair Instructions
CADILLAC/CHEVROLET/GMC: SERVICE HYBRID SYSTEM MESSAGE AND OR SERVICE ENGINE SOON LAMP ON. ENGINEERING WOULD LIKE INFORMATION ON VEHICLES WITH DTC P0C19, P0C1A, P0A78, P0A79, P0C0B, P0C0E, P0BFD, OR P0BFE. RETRIEVE AND SAVE THE FREEZE FRAME DATA, THEN RECORD A SNAPSHOT OF BOTH MOTOR CONTROL MODULE 1 AND 2 DURING A CRANK ATTEMPT. *PE
PIT-4853
Service Bulletin/Repair Instructions
CADILLAC/CHEVROLET/GMC: CONCERNS REGARDING VEHICLES NO CRANK; LOSS OF HIGH SPEED LAN OR MULTIPLE U CODES IN SEVERAL MODULES; LOSS OF THE POWERTRAIN EXPANSION BUS OR MULTIPLE U CODES IN SEVERAL HYBRID MODULES; SES LAMP, SERVICE BRAKE SYSTEM MESSAGE, SERVICE HYBRID SYSTEM, ETC. *PE UPDATED 3/15/10. *PE UPDATED 3/29/10. *PE