WenmarOpen by Wenmar Pro

Service bulletins for the 2004 GMC Envoy

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.

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

By type

By component

By trouble code

By topic

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
PIP51632017-08-15. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary Information communication provides information to the technician about engine block of possible cylinder bore damage, scoring or out of round as the possible cause of engine oil consumption, misfire, cylinder leakage or blow by. Technician will need to inspect the engine for Cylinder damage or scoring, An out of round cylinder bore, Dirt intrusion, and Catalytic Converter failure.
06-06-01-010C2017-08-15. Service bulletin. ENGINE. This informational bulletin provides information on close coupled converters and there affect on newly installed engines or engines during there break in period.
PIP52262017-08-15. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary Information communication provides information to the technician about finding needle bearings during an oil change. Technician will gain access to the roller rockers to inspect them. Only replace the roller rocker that is missing needle bearings. Be sure to clean the oil drains to retrieve the needle bearings. Each roller rocker has 66 bearings.
PIP5163A2017-08-15. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary Information communication provides information to the technician about engine block of possible cylinder bore damage, scoring or out of round as the possible cause of engine oil consumption, misfire, cylinder leakage or blow by. Technician will need to inspect the engine for Cylinder damage or scoring, An out of round cylinder bore, Dirt intrusion, and Catalytic Converter failure.
PIP51692017-08-15. Service bulletin. ENGINE. This Preliminary Information communication provides information to the technician about vehicles that are setting Diagnostic Trouble Code P0300 after engine repairs. Technician will need to ensure that injector connectors for cylinder 5-7 and 6-8 are not crossed.
PIP3343D2017-08-15. Service bulletin. ENGINE. This Preliminary Information communication provides information to the technician about vehicles that have an oil leak shortly after a cold start when extremely low ambient temperatures are present. Technician will need to clean the area of the oil leak, clean and dry the PCV hoses, and replace the oil fill cap with part number 12589430.
PIP4138P2017-08-15. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE. This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp on, engine misfire, and/or engine noise. Technician may find Diagnostic Trouble Codes P0300-P0308. If published Service Information diagnostics does not isolate the cause of this concern technician should check for a worn camshaft lobe and/or lifter roller, a sticking valve, valve leakage, a broken valve spring, and a collapsed active fuel management lifter.
PIP5029G2017-05-16. Service bulletin. ENGINE. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ABOUT VEHICLES THAT HAVE A MALFUNCTION INDICATOR LAMP ON OR ENGINE MISFIRE, ROUGH IDLE, EXTENDED CRANK, OR CRANK NO START IN SOME CASES. TECHNICIAN WILL NEED TO PERFORM PUBLISHED SERVICE INFORMATION DIAGNOSTICS. IF TECHNICIAN FINDS CARBON, AN UPPER ENGINE AND VALVE CLEANING SHOULD BE PERFORMED.
PI1394A2016-10-19. Service bulletin. ENGINE. THIS INFORMATIONAL BULLETIN PROVIDES ADDITIONAL INFORMATION ON HOW TO INSTALL PISTONS AND SUGGEST WHAT TOOLS TO USE.
030604017I2016-10-18. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL. THIS INFORMATIONAL BULLETIN EXPLAINS THE USE OF DIESEL FUEL ADDITIVES IN AN ENGINE, ARE NOT REQUIRED UNLESS THE CUSTOMER DESIRES ADDITIVES TO PREVENT FUEL CONCERNS DEPENDING ON FUEL OR TEMPERATURE RELATED CONDITIONS.
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.
PIP-4573-B2016-01-16. Service bulletin. EQUIPMENT; ENGINE. BUICK/SAAB/CHEVROLET/HUMMER/GMC: SOME VEHICLES ARE EXPERIENCING, AT A COLD START FOR ENGINES, REDUCTION IN ENGINE POWER AND SES LIGHT, WHEN TEMPERATURES ARE -10F (-23C) AND ALSO REAR/FRONT CRANK SEAL, CAM COVER GASKET AND DIPSTICK TUBE WILL BE LEAKING OIL. MODEL 2004-07 RAINIER, 2002-09 TRAIL BLAZER, ENVOY, 2004-12 COLORADO, CANYON, 2006-12 H3, 2005-09 97X. *PE
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
0601390022007-07-24. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. FRONT BLOWER MOTOR INOPERATIVE OR MAY NOT SHUT OFF IN EXTREMELY LOW AMBIENT TEMPERATURE CONDITIONS. *KB
0606040482007-01-25. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. 4.2L LL8 ENGINE FLASHING AND/OR MIL/SES LIGHT. ROUGH IDLE, MISFIRE. DTC P0300, P0301, P0302, P0303, P0304, P0305, AND P0306. *KB
0606020032006-03-20. Service bulletin. ENGINE AND ENGINE COOLING. OPERATING CHARACTERISTICS OF THE ELECTRO-VISCOUS (EV) FAN CLUTCH AND DIAGNOSTIC TIPS FOR COOLING FAN NOISE, DELAYED TRANSMISSION SHIFTS AND/OR ENGINE REVVING TOO HIGH. *TT
38572006-02-21. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. SUPPLEMENT TO BULLETIN 05-01-37-002A, POOR REAR HEAT PERFORMANCE . *AK
3659A2006-02-16. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. SES LIGHT AFTER INTERNAL ENGINE REPAIRS DUE DTC P0016 OR P1345. *TT
0506020122006-01-26. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. SERVICE ENGINE SOON (SES) OR CHECK ENGINE LIGHT ON, DTC P0526, P0480, P1481, AND P1484 SET. *TT UPDATED. *KB
0506010342006-01-12. Service bulletin. ENGINE AND ENGINE COOLING. ENGINE OIL LEAK AT REAR COVER ASSEMBLY AREA. *TT
36142006-01-06. Service bulletin. ENGINE AND ENGINE COOLING. P0300 DUE TO RANDOM MISFIRES NOT FELT - POSSIBLE ACCESSORY PULLEY. *TT
0506010262005-12-02. Service bulletin. ENGINE AND ENGINE COOLING. INFORMATION ON USE OF BOLT EXTRACTOR TOOL KIT PART NUMBER EN-47702 FOR REMOVING BROKEN CYLINDER HEAD OR MAIN BEARING CAP BOLTS ON INLINE TRUCK ENGINES. *TT
0506010142005-11-07. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. OIL LEAK UNDER EXTREME COLD TEMPERATURES (-34 DEGREES C) (-30 DEGREES F) OR COLDER). *TT
3164A2005-10-28. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. SERVICE ENGINE SOON LIGHT DUE A DIAGNOSTIC TROUBLE CODE P0606 DIAGNOSTIC TROUBLE CODE, OPERATE IN REDUCED ENGINE POWER MODE, AND POTENTIALLY STALL. *TT

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