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Service bulletins for the 2008 Hummer H2

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.

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

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Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
PIP-4138K2011-06-08. Service bulletin. ENGINE AND ENGINE COOLING. GM: THE SERVICE ENGINE SOON LIGHT IS ON, THERE IS ALSO A MISFIRE OR ENGINE NOISE. THERE ARE MULTIPLE POSSIBLE CAUSES. *RM
PIP-4492P2011-03-16. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV). BUICK/CADILLAC/CHEVROLET/GMC/HUMMER/PONTIAC/SAAB: OIL CONSUMPTION AND/OR EXHAUST SMOKE-POSSIBLE PCV BAFFLE OR LIFTER CONCERN. UPON INSPECTION, OBVIOUS OIL WILL BE FOUND IN THE INTAKE MANIFOLD AND/OR PCV VACUUM TUBE. *PE UPDATED 3/21/11. *PE UPDATED 5/9/11. *PE UPDATED 5/25/11. *PE UPDATED 06/16/2011. *KB UPDATED A SECOND TIME ON 06/16/2011. *KB UPDATED 6/27/11. *PE
PIT-50282011-03-14. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. PONTIAC/SATURN/BUICK/GMC/CHEVROLET/CADILLAC/HUMMER: VEHICLE START AND STALLS AFTER THEFT DETERRENT MODULE REPLACEMENT. MODEL YEARS 2006-2011. DOES NOT APPLY TO VEHICLES WITH KEYLESS ACCESS SYSTEM. *PE
SB-07-06-04-019A2009-06-02. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ENGINE AND ENGINE COOLING:ENGINE. GENERAL MOTORS: INTERMITTENT MIL/SES/ DTC P2138 WITH REDUCED ENGINE POWER (REPAIR INSTRUMENT PANEL (IP) TO BODY HARNESS CONNECTOR). 2005-08 GM PASSENGERS CARS/LIGHT DUTY TRUCKS (INCL. SATURNS). *PE UPDATED 11/5/10. *PE UPDATED 4/4/11. *PE UPDATED 2/3/16. *PE
PIP43212008-04-02. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. OIL LEAK AT REAR OF ENGINE. EQUIPPED WITH A 4.8, 5.3, 6.0 OR 6.2 V8 ENGINE. *NJ
0706010162007-10-06. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. INFORMATION ON INTERNAL ENGINE NOISE OR DAMAGE AFTER OIL FILTER REPLACEMENT. MODELS - 2008 AND PRIOR PASSENGER CARS AND TRUCKS (INCLUDING SATURN AND SAAB) AND PRIOR HUMMER H2, H3. *NJ
SB-0706040192007-09-21. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. INTERMITTENT MIL/SES, DTC P2138 WITH REDUCED ENGINE POWER (REPAIR INSTRUMENT PANEL (IP) TO BODY HARNESS CONNECTOR). 2005-2008 GM PASSENGER CARS AND LIGHT DUTY TRUCKS INCLUDING SATURN. *NJ UPDATED 11/19/10. *PE UPDATED 3/30/11. *PE
0506040352006-05-08. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE; FUEL SYSTEM, GASOLINE. USAGE OF E85 FUELS IN GM VEHICLES. 1997 - 2008 ALL GM CARS AND TRUCKS. 1997 - 2008 ALL SATURN VEHICLES. *TT UPDATED. *KB UPDATED ON 10/22/07. *NJ
04-06-01-0292005-03-11. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. UNNECESSARY ENGINE CRANKCASE AND SUBSYSTEMS FLUSHING SERVICES, ADDITIVE RECOMMENDATIONS AND PROPER UTILIZATION OF GM SIMPLIFIED MAINTENANCE SCHEDULE TO ENHANCE CUSTOMER SERVICE EXPERIENCE. 2008 AND PRIOR GM CARS AND TRUCKS. *TT UPDATED 3/31/08. *NJ

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