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Service bulletins for the 2004 GMC Canyon

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.

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

About P0622 on the 2004 GMC Canyon: what the code means, and the bulletins and recalls about the same components.

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Only bulletins with trouble code: P0622 are shown. Show all

Bulletins, newest first
041920042004-09-17. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. SERVICE ENGINE SOON LAMP BEING ILLUMINATED. WITH DIAGNOSTIC TROUBLE CODES P0507, P0621 OR P0622. GM VOICEMAIL EXPRESS. *TT
020652004-07-10. Service bulletin. ELECTRICAL SYSTEM. DIAGNOSTIC TROUBLE CODE (DTC) P0621 AND/OR P0622. BATTERY CHARGE INDICATOR ILLUMINATED ON INSTRUMENT PANEL CLUSTER (IPC). *TT
017872004-05-11. Service bulletin. ELECTRICAL SYSTEM. BATTERY LIGHT AND OR MESSAGE ON DIC WITH OR WITHOUT P0621, P0622. *MR

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