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: Transmission and driveline are shown. Show all
| 020730001A | 2002-03-21. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. DIAGNOSTIC INFORMATION ON DIAGNOSTIC TROUBLE CODE P1870, TRANSMISSION COMPONENT SLIPPING FOR 2000 - 2002 PASSENGER CARS AND LIGHT DUTY TRUCKS. *TT UPDATE TO INCLUDE 2004 MODELS. *TT UPDATED *EH |
|---|---|
| 010730042 | 2002-03-21. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. SOME VEHICLES MAY EXHIBIT A CLUNK NOISE THAT CAN BE HEARD ON A 2-3 UPSHIFT ON 2002 AND PRIOR LIGHT DUTY TRUCKS. *TT UPDATE. 2007 AND PRIOR PASSENGER CARS AND LIGHT DUTY TRUCKS. *KB |
| 010730030A | 2002-02-15. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. DIAGNOSTIC INFORMATION ON HARSH 1-2 UPSHIFT. 2001-2002 PASSENGER VEHICLES AND LIGHT DUTY TRUCKS. *YH TO INCLUDE 2003-2006 PASSENGER VEHICLES AND LIGHT DUTY TRUCKS. *TT |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.