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Service bulletins for the 2008 GMC Sierra

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.

1655 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Automatic transmission are shown. Show all

Bulletins, newest first
PIP-44242008-11-26. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES. GMC: LEAK FROM TRANSMISSION OIL COOLER LINE FITTING ON VEHICLES BUILT IN APRIL OR MAY, 2008. *PE
PIP-43952008-10-02. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. GMC: FLARE AND OR HARSH 2-3 SHIFTS. THIS CONDITION MAY BE CAUSED BY LEAKING 1-2-3-4 AND 3-5-R CLUTCH FLUID SEAL RINGS (230). MODELS CADILLACS, CHEVROLETS, GMC, HUMMERS, PONTIACS. EQUIPPED WITH 6L80 (RPO MYC) OR 6L90 (RPO MYD) AUTOMATIC TRANSMISSION. *PE
08-07-30-0232008-08-28. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. 4L60-E/4L65-E/4L70-E AUTOMATIC TRANSMISSION FLUID LEAK FROM OIL PUMP OR BELL HOUSING AREA (REPLACE TORQUE CONVERTER HUB-TO-OIL PUMP SEAL ASSEMBLY). ATTN: THIS BULLETIN APPLIES TO VEHICLES BUILT PRIOR TO DECEMBER 2007. *PE
SB-08-07-30-0212008-08-28. Service bulletin. LATCHES/LOCKS/LINKAGES:DOORS:LATCH; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ENGINE AND ENGINE COOLING:ENGINE; POWER TRAIN:AUTOMATIC TRANSMISSION; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). LOSS OF HIGH SPEED GMLAN COMMUNICATIONS, INTERMITTENT NO CRANK, IPC GAUGE FLUCTUATION, INTERMITTENT DOOR LOCK CYCLING, TRANSMISSION MAY NOT SHIFT, DTCS U0073, U0100, U0101, U0102, U0121, U0140 SET (REPAIR BACKED OUT TERMINAL IN TRANSMISSION HARNESS CONNECTOR). VEHICLES WITH 6 SPEED 6L80 (RPO MYC), 6L90 (RPO MYD) OR HYBRID TWO MODE 2M70 AUTOMATIC. INCLUDING 2008 TAHOE AND YUKON HYBRID MODELS. *PE UPDATED 3/28/11. INCLUDING SIERRA, SILVERADO AND ESCALADE HYBRIDS. *PE
08-07-30-0212008-08-07. Service bulletin. LATCHES/LOCKS/LINKAGES:DOORS:LATCH; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ENGINE AND ENGINE COOLING:ENGINE. LOSS OF HIGH SPEED GMLAN COMMUNICATIONS, INTERMITTENT NO CRANK, IPC GAUGE FLUCTUATION, INTERMITTENT DOOR LOCK CYCLING, TRANSMISSION MAY NOT SHIFT, DTCS U0073, U0100, U0101, U0102, 70140 (REPAIR BACKED OUT TERMINAL IN TRANSMISSION HARNESS CONNECTOR). *PE
PIP36052008-04-28. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). DTC U0101, NO ENGINE CRANK AND NO TECH II COMMUNICATION WITH TCM. EQUIPPED WITH ALLISON LCT1000 (RPO-MW7) AUTOMATIC TRANSMISSION. *NJ
PIP43292008-03-27. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). CURRENT OR INTERMITTENT DTC P0741 TCC STUCK OFF. EQUIPPED WITH 4L60E, 4L65E OR 4L70E (RPO M30, M32, M70) AUTOMATIC TRANSMISSION. *NJ
42922008-01-31. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. DTC P0756, P0796, P2714, P2723, TCC SHUDDER OR HARSH ENGAGEMENT, HARSH SHIFTS, WATER IN TRANSMISSION - KEYWORDS CODE CONVERTER FLUID TORQUE. EQUIPPED WITH 6L50, 6L80 OR 6L90 (RPO'S MYB, MYC, MYD) AUTOMATIC TRANSMISSION. *NJ
43022008-01-31. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER. DTC P0751, P0756, P0776, P0796, P2714, P2723, HARSH TCC ENGAGEMENT. EQUIPPED WITH 6L80 (RPO MYC) AUTOMATIC TRANSMISSION. *NJ
41432008-01-31. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). U0106 LOSS OF COMMUNICATION WITH GLOW PLUG CONTROL MODULE. EQUIPPED WITH THE 6.6L DURAMAX DIESEL ENGINE RPO CODE LMM. *NJ
PIP-42902008-01-30. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). ENGINE SURGE OR STALL AT STOP AND/OR DTC P0742 POSSIBLE TCC APPLIED. EQUIPPED WITH ALLISON LCT1000 TRANSMISSION RPO M74 OR MW7. *NJ UPDATED 4/22/13. *PE
072932008-01-23. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). CHEVROLET GMC SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. TRANSMISSION OVERHEAT IN EXTREME COLD AMBIENT TEMPERATURES - REPROGRAM TCM. LOCATED IN ALASKA AND MINNESOTA; CANADIAN YUKON AND NORTHWEST TERRITORIES ONLY. *NJ CSC WAS RECEIVED. UPDATED 3/13/08. *NJ UPDATED 4/24/08. *NJ UPDATED 7/8/09. CSC LETTER WAS RECEIVED. *PE
PIP42192007-10-04. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). DIAGNOSIS FOR SERVICE FAST LEARN ADAPTS FAILS, NO FORWARD OR NO REVERSE. *NJ UPDATED 4/1/08. *NJ
40522007-09-27. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. 2-3 UPSHIFT SLIP OR FLARE. *KB
41682007-08-13. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. LOW POWER, POOR PERFORMANCE, OR BUSY SHIFTING. *KB UPDATED 09-26-07. *KB
31362007-02-22. Service bulletin. POWER TRAIN:MANUAL TRANSMISSION; POWER TRAIN:AUTOMATIC TRANSMISSION. SLIP CONDITION IN 2ND, 3RD, OR 4TH. DAMAGED 2-4 OR 3-4 CLUTCH. *KB UPDATED 10/31/07. *NJ

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