Service bulletins for the 2004 GMC Sonoma
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.
411 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
Only bulletins with component: Transfer case are shown. Show all
| PIP3366C | 2018-08-20. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE); POWER TRAIN:AUTOMATIC TRANSMISSION. This Preliminary information communicates to the dealer technician thatLight Duty Trucks equipped with automatic transmissions and 4 wheel drive may exhibit a condition of grinding/ratcheting type noise when shifting the automatic transmission into park while the transfer case is in 4 wheel drive low (4LO) range. Dealers technician's are advised this condition should be deemed a normal characteristic of 4WD low operation. |
|---|
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.