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Service bulletins for the 2008 Chevrolet HHR

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

939 on file from NHTSA, as of 2026-10-19.

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Bulletins, newest first
PIT-3749D2011-05-26. Service bulletin. STRUCTURE:FRAME AND MEMBERS. GM: ON SOME TRUCK MODELS THERE IS SOME FRAME CORROSION. *RM UPDATED ON 5/2/2012. *KB
PI-02962011-05-23. Service bulletin. FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS; ELECTRICAL SYSTEM:WIRING. GM: MALFUNCTION LIGHT IS ON AND THERE IS A MISFIRE. THERE MAY BE THREE TROUBLE CODES AND COULD BE A RESULT OF WIRING PROBLEMS AT THE FUEL INJECTOR. *RM
05-09-40-002E2011-05-11. Service bulletin. SEAT BELTS:FRONT:WEBBING; SEAT BELTS:FRONT:RETRACTOR. GM: SERVICE BULLETIN EXPLAINING WHEN THE SAFETY BELTS ARE SUPPOSED TO LOCK. *RM UPDATED 12/6/11. *PE
SB-09-01-37-002D2011-05-10. Service bulletin. STRUCTURE:BODY; STRUCTURE. GM: THE FRONT AND REAR FLOOR CARPET MAY BE WET DUE TO A PLUGGED HVAC DRAIN. *RM UPDATED 02/06/12. *PE
PI-0128A2011-03-28. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. CHEVROLET/PONTIAC/SATURN/DAEWOO/OPEL: ENGINE MISFIRE/LOW COMPRESSION. TECHNICIAN SHOULD PERFORM A COMPRESSION TEST. RESULTS MAY LEAD TO CYLINDER WITH LOW COMPRESSION (85-90PSI). THIS MAY CAUSE THE MISFIRE. *PE
PIP-48202011-03-15. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER; ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER. CHEVROLET/PONTIAC/SATURN/DAEWOOD/OPEL: LOW TURBOCHARGER BOOST PRESSURE OR POSSIBLE DTC P0299. TECHNICIANS MAY FIND DTC P0299 PRESENT. MAY ALSO FIND THE TURBO WASTEGATE ACTUATOR ROD NUT MISSING. MOST PARTS OF THE TURBOCHARGER ARE NOT SERVICEABLE. *PE
PIC-53632011-02-26. Service bulletin. FUEL SYSTEM, OTHER:STORAGE:FUEL GAUGE SYSTEM. HHR:IN RARE CASES THE FUEL GAUGE IS NACCURATE OR VEHICLE MAY RUN OUT OF FUEL AT 1/8 TANK. VEHICLE MAY CRANK WITH NO START. *PE UPDATED 5/9/11. *PE
PIP-46742010-07-23. Service bulletin. POWER TRAIN:MANUAL TRANSMISSION. CHEVROLET/PONTIAC/SATURN: BLOCKED SHIFT, GEAR HOP OUT 1ST, 3RD, 5TH GEAR OR DIFFICULTY SHIFTING. THE SHIFT LEVER ON THE MANUAL TRANSMISSIONS ROLL PIN CAN BACK OUT AND CONTACT THE SHIFT COVER DURING A SHIFT EVENT. THIS CAN CAUSE AN INCOMPLETE, BLOCKED SHIFT OR DIFFICULTY SHIFTING THE TRANSMISSION. *PE
PIP-46512010-06-08. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. SATURN/PONTIAC/CHEVROLET: SOFT SHIFTS, ERRATIC SHIFTS, DTC P1811. VEHICLES WITH A HYDRAMATIC 4T45 TRANSAXLE MAY HAVE SOFT SHIFTS OR SHIFTS ERRATICALLY. THESE CONDITIONS MAY APPEAR INTERMITTENTLY OR SET A DTC P1811. DURING DIAGNOSIS, A LOW OR HIGH LINE PRESSURE (ACTUAL VERSUS DESIRED) MAY BE OBSERVED. *PE
SB-08-09-41-0012010-06-02. Service bulletin. ELECTRICAL SYSTEM; AIR BAGS. CHEVROLET: AIR BAG READINESS LIGHT/SUPPLEMENTAL INFLATABLE RESTRAINT (SIR) LIGHT ON, DIAGNOSTIC TROUBLE CODE(S) (DTC) B0057, B0058, B0059, B0064, B0065, B0066 (INSPECT/REPAIR WIRING CONNECTOR). *PE
PIP-46382010-04-12. Service bulletin. POWER TRAIN:MANUAL TRANSMISSION. CHEVROLET: DIFFICULT TO SHIFT OR UNABLE TO SELECT ALL GEARS. THE TRANSMISSION IS DIFFICULT TO SHIFT AND/OR IT CANNOT BE SHIFTED INTO ALL GEARS. THIS CONDITION MAY BE CAUSED BY A LOCATOR PIN LEFT IN PLACE THAT WAS MEANT TO BE REMOVED AT THE ASSEMBLY PLANT OR A SHIFT CABLE OUT OF POSITION. (COBALT SS/HHR SS). *PE
SB-09-06-93-0022010-03-26. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. DAEWOO/OPEL/SATURN/PONTIAC/CHEVROLET: TURBOCHARGER HOUSING INLET FLANGE CRACKS IN PARTITION WALL. *PE
PIC-4610A2010-03-24. Service bulletin. ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:WIRING. CHEVROLET: ENGINE POWER IS REDUCED MESSAGE AND CHECK ENGINE LAMP ON WITH DTC P0841. THE CONCERN MAY BE INTERMITTENT. OTHER DTCS THAT MAY SET ARE P0532, P0522, P0452, P0335, P0106, P0101 AND P0068. THREE AREAS WHERE WIRE CHAFFING CAN OCCUR HAVE BEEN IDENTIFIED AND CONFIRMED. *PE
SB-09-09-41-0042010-03-06. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. DAEWOO/SATURN/OPEL/PONTIAC/CHEVROLET: INSTRUMENT PANEL CLUSTER (IPC) AIR BAG INDICATOR ILLUMINATED (INSTALL PROTECTIVE MATERIAL). UPON PERFORMING A DTC CHECK, THE TECHNICIAN MAY FIND A B0012-02, B0012-OE OR B0013-OE CODE STORED IN THE SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) SYSTEM. THIS CONDITION MAY BE CAUSED BY A SHORT TO GROUND IN THE YELLOW SIR WIRING HARNESS. *PE UPDATED 6/16/15. *PE
SB-091262010-02-17. Service bulletin. POWER TRAIN:MANUAL TRANSMISSION. CHEVROLET: SERVICE UPDATE FOR INVENTORY AND CUSTOMER VEHICLES CHARGE AIR COOLER INLET DUCT DETACHMENT - EXPIRES WITH BASE WARRANTY. *PE
PIC-51492009-11-25. Service bulletin. SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM. CHEVROLET: AFTER INSTALLATION OF THE OHB BRAKE KIT PER TSB 09-05-22-001A, A CHECK ENGINE LIGHT WILL BE ON AND DTC P258B WILL BE SET. FOLLOWING ESI DIAGNOSTICS MAY LEAD DEALERS TO TRY REPROGRAMMING THE ECM OR EBCM AND ALSO REPLACE THE VACUUM PUMP. *PE
SB-5078A2009-11-25. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. CHEVROLET/OPEL/SATURN/CADILLAC/PONTIAC: A LOW BATTERY CONDITION ON ANY OF THE ABOVE LISTED VEHICLES COULD POTENTIALLY CAUSE THE SIR LIGHT TO COME. THE SDM UNDER LOW POWER SITUATIONS COULD SET CODES B0083 AND B0084. *PE
TB-09-07-30-0092009-08-04. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. GENERAL MOTORS: AN AUTOMATIC TRANSMISSION CONCERN OF NO MOVEMENT, NO REVERSE OR SLIPPING. THESE CONCERNS MAY BE DUE TO AN ISSUE WITH THE DIRECT CLUTCH. *PE
TB-080941006B2009-08-03. Service bulletin. AIR BAGS. GENERAL MOTORS: THE SIR LIGHT IS ILLUMINATED. DTC B0081 PASSENGER PRESENCE SYSTEM (PPS) CODE STORED (INSPECT PPS SYSTEM CONNECTORS). *PE
TB-080849017B2009-08-01. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. GENERAL MOTORS: THE INSTRUMENT GAUGES APPEAR TO BE ERRATIC/INACCURATE OR ARE INOPERATIVE. THIS CONDITION MAY BE INTERMITTENT AND OCCUR OVER ONE OR MULTIPLE IGNITION CYCLES, EVENTUALLY RESETTING ITSELF. *PE
TB-PIP-45202009-07-22. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. GENERAL MOTORS: TECH MAY ENCOUNTER A VEHICLE WITH A LOW BOOST/POWER CONDITION AND/OR DTC P0299 AND OR P0101 SETTING. THIS MAY BE THE RESULT OF A CRACKED OR BROKEN FITTING AT THE TURBOCHARGER ASSEMBLY. *PE
SB-090522001A2009-07-21. Service bulletin. SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP. CHEVROLET: HARD BRAKE PEDAL, EXTRA EFFORT NEEDED TO DEPRESS BRAKE PEDAL ON COLD START UP (ADD AUXILIARY VACUUM PUMP). *PE
SB-08-09-41-002C2009-07-20. Service bulletin. AIR BAGS. GENERAL MOTORS: DIAGNOSTIC INFORMATION FOR INTERMITTENT RESTRAINTS, AIR BAG (SIR) INDICATOR/LAMP ON WITH DTC(S) B0012, B0013, B0016, B0016, B0019, B0020, B0022, B0023, B0026, B0033, B0040, B0042 OR B0044 SET. THIS MAY BE CAUSED BY A LOOSE, MISSING, OR BROKEN CONNECTOR POSITION ASSURANCE (CPA) RETAINER AT THE AIR BAG FOR THE SET DTC. INCLUDES TRAILBLAZER EXT. *PE UPDATED 8/16/10. *PE UPDATED 3/12/12. *PE
PB-082002009-06-10. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. CHEVROLET PONTIAC SATURN SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ENGINE OIL PAN DRAIN PLUG THREAD INSERT LOOSE OR DAMAGED; INSPECT/INSTALL NEW INSERT. MAY HAVE AN UNDERSIZE ENGINE OIL PAN DRAIN PLUG THREAD INSERT. *PE
08-2002008-11-18. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. CHEVROLET PONTIAC SATURN SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ENGINE OIL PAN DRAIN PLUG THREAD INSERT LOOSE OR DAMAGED-INSPECT/INSTALL NEW INSERT. VEHICLES MAY HAVE AN UNDERSIZE ENGINE OIL PAN DRAIN PLUG THREAD INSERT THAT WILL BE INSTALLED TOO FAR INTO THE OIL PAN HOLE. *PE CSC LETTER WAS RECEIVED. UPDATED 12/1/08. *PE

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.