WenmarOpen by Wenmar Pro

Service bulletins for the 2001 GMC B7

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.

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

By type

By component

By trouble code

Bulletins, newest first
PIC5050A2016-10-25. Service bulletin. EQUIPMENT:ELECTRICAL. THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN THE STEPS ON REPAIRING THE CONCERN. A CUSTOMER MAY IDENTIFY A CONCERN OF UNABLE TO REACTIVATE A VEHICLE'S ONSTAR THAT HAS BEEN PREVIOUSLY DISABLED BY ONSTAR. DEALER IS TO CALL GENERAL MOTORS TECHNICAL ASSISTANCE CENTER FOR FURTHER ASSISTANCE IF THE CONCERN IS STILL PRESENT.
PIC4935E2016-10-25. Service bulletin. ELECTRICAL SYSTEM. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO HELP THE DEALERSHIP TECHNICIANS PERFORM A PARASITIC DRAIN TEST FOR THE ONSTAR MODULE. WHEN PERFORMING BATTERY PARASITIC DRAIN TEST, THERE MAY BE SOME CONFUSION AS TO WHAT THE NORMAL POWER CONSUMPTION READING SHOULD BE FROM THE ONSTAR SYSTEM.
PI1394A2016-10-19. Service bulletin. ENGINE. THIS INFORMATIONAL BULLETIN PROVIDES ADDITIONAL INFORMATION ON HOW TO INSTALL PISTONS AND SUGGEST WHAT TOOLS TO USE.
000601012F2016-10-18. Service bulletin. ENGINE. THIS INFORMATIONAL BULLETIN PROVIDES INFORMATION TO GM DEALERS ON THE CORRECT CLEANING METHODS WHEN CLEANING ENGINE GASKET SEALING SURFACES.
16NA2602016-10-17. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. THIS TECHNICAL BULLETIN PROVIDES A PROCEDURE TO REPROGRAM THE MEDIA DISC PLAYER WITH THE LATEST CALIBRATIONS TO CORRECT A CONDITION OF THE REAR ENTERTAINMENT SYSTEM NOT OPERATING AS INTENDED IN COLDER AMBIENT TEMPERATURE AREAS DUE TO CALIBRATION CONCERNS.
PIC-4935-E2016-08-17. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO HELP THE DEALERSHIP TECHNICIANS PERFORM A PARASITIC DRAIN TEST FOR THE ONSTAR MODULE. WHEN PERFORMING BATTERY PARASITIC DRAIN TEST, THERE MAY BE SOME CONFUSION AS TO WHAT THE NORMAL POWER CONSUMPTION READING SHOULD BE FROM THE ONSTAR SYSTEM.
PIC-5050-A2016-08-17. Service bulletin. ELECTRICAL SYSTEM. THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN THE STEPS ON REPAIRING THE CONCERN. A CUSTOMER MAY IDENTIFY A CONCERN OF UNABLE TO REACTIVATE A VEHICLE'S ONSTAR THAT HAS BEEN PREVIOUSLY DISABLED BY ONSTAR. DEALER IS TO CALL GENERAL MOTORS TECHNICAL ASSISTANCE CENTER FOR FURTHER ASSISTANCE IF THE CONCERN IS STILL PRESENT.
SB-10-08-50-003B2012-02-06. Service bulletin. SEATS:FRONT ASSEMBLY:HEAD RESTRAINT. GENERAL MOTORS: INFORMATION PROVIDED BY BULLETIN FOR ALL 2012 AND PRIOR GENERAL MOTOR TRUCKS AND PASSENGER VEHICLES REGARDING THE ADJUSTABLE COMFORT AND CUSTOM UPHOLSTERY OF THE DRIVER AND THE PASSENGER HEAD RESTRAINT. *PE
SB-06-02-32-013B2010-03-26. Service bulletin. STEERING:HYDRAULIC POWER ASSIST:PUMP. SAAB/HUMMER/GM: DIAGNOSTIC TIPS/RECOMMENDATIONS WHEN POWER STEERING PUMP REPLACEMENT IS NECESSARY. ANALYSIS OF RETURNED POWER STEERING (PS) PUMPS THAT HAD BEEN REPLACED FOR NOISE, NO POWER ASSIST, NO OR LOW PRESSURE AND LEAKING CONDITIONS HAS INDICATED A HIGH NUMBER OF NO TROUBLE FOUND RESULTS. ALL 1997-2010 VEHICLES AND LIGHT TRUCKS; 2010 AND PRIOR HUMMERS H2/H3 AND SAAB 9-7X VEHICLES. *PE
PIP-46952010-03-25. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. GM: LOSS OF POWER HESITATES ON ACCELERATION. 4.3, 4.8, 5.3, 5.7 AND 6.0 ENGINES COUPLED WITH THE 4L60E OR 4L65E MAY EXPERIENCE A CONDITION OF HESITATES, MISSES OR LOSS OF POWER UNDER ACCELERATION. THE VEHICLE MAY OPERATE AS IF IT IS IN REDUCED POWER MODE. *PE
0505270012005-11-10. Service bulletin. SERVICE BRAKES, AIR. INFORMATION ON AIR BRAKE PARK BRAKE CHAMBER VENT HOLES TO AVOID WATER INTRUSION. *TT
070120042005-04-29. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. OIL LIFE SYSTEM RESET PROCEDURES-TRUCKS. BUICK TERAZZA 2005, GMC SIERRA DENALI 2002-2003, GMC B7 CHASSIS MEDIUM DUTY 2003-2005 AND GMC 560 C-SERIES 2003-2005 *SC
0302320442003-12-02. Service bulletin. STEERING. EFFECT OF STEERING BOX LIMITER ADJUSTMENT ON TURNING RADIUS AND POSSIBILITY OF POWER STEERING SYSTEM DAMAGE DUE TO IMPROPER ADJUSTMENT. VARIOUS 1990-2004 MODELS. *TT
0205220052003-03-25. Service bulletin. SERVICE BRAKES, HYDRAULIC. RELEASE OF NEW REAR BRAKE PIPE SHIELDS. *TT
020604026A2003-02-27. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. ENGINE BACKFIRE AND RELATED DRIVEABILITY ISSUES. *TT
0206010352003-02-14. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. HIGH OIL CONSUMPTION. *TT
0206040262002-10-09. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. THIS BULLETIN IS BEING ISSUED TO ASSIST TECHNICIANS IN EFFICIENTLY DIAGNOSING AND CORRECTING BACKFIRE AND OTHER RELATED DRIVEABILITY CONCERNS. *TT
0206010152002-09-28. Service bulletin. UNKNOWN OR OTHER. SUBJECT REGARDING LOW OIL PRESSURE AND NEW OIL LEVEL INDICATOR. NLM
0206040052002-04-02. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. SUBJECT REGARDING REVISED DIAGNOSTIC TROUBLE CODE P1221 SERVICE MANUAL INFORMATION. *TT
0106010192001-11-01. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. SOME CUSTOMERS MAY COMMENT ON EXCESSIVE ENGINE VIBRATION AT IDLE ON VARIOUS 1998 - 2001 MEDIUM DUTY MODELS INCLUDING CHEVROLET AND GMC F MODELS. *TT
0106010182001-08-30. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. SOME OWNERS MAY COMMENT ON A TICKING NOISE IN THEUPPER END OF THE ENGINE. THE NOISE IS CONSTANT AND DOES NOT VARY WITH ENGINE RPM. A LOSS OF POWER MAY BE NOTICED. *TT
1210002001-03-22. Service bulletin. FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY. INFORMATION ON FUEL TANK SHIELDS. *TT

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