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Service bulletins for the 2004 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.

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

By type

By component

By trouble code

By topic

Only bulletins with component: Anti-lock brakes are shown. Show all

Bulletins, newest first
PIT3271J2019-12-09. Service bulletin. WHEELS; SERVICE BRAKES, AIR:ANTILOCK. This Preliminary Information communication provides information to the technician about changing the tire and wheel size on vehicles. General Motors will only support a tire calibration for tires that have been sized, tested and designed for the vehicle in question and its applications. Technician should not use the information that is provided by the antilock braking system tire size selection.
35212005-09-28. Service bulletin. SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:ABS WARNING LIGHT; SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT. ANTI-LOCK BRAKING SYSTEM (ABS) LIGHT ON SPEEDOMETER MAY BE ERRATIC. DIAGNOSTIC TROUBLE CODE (DTC) C0055 C0235 C0236 OR C0237 STORED IN THE EBCM. *TT 1998-2008 ALL CHEVROLET, GMC, BUICK, AND OLDSMOBILE MID-SIZED TRUCKS AND UTILITIES. 1998-2008 ALL CHEVROLET, GMC, AND CADILLAC FULL SIZED TRUCKS AND UTILITIES. *KB UPDATED ON 09/20/07. *NJ
0305250072003-12-02. Service bulletin. SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP. ANTILOCK BRAKE (ABS) ACTIVATION AT LOW SPEEDS (CLEAN WHEEL SPEED SENSOR MOUNTING SURFACE). *TT UPDATED 10/23/09. *PE

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