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Service bulletin 3656

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10021674
Published by NHTSA2007-06-15
Manufacturer's number3656
Replaces3656A
NHTSA componentUNKNOWN OR OTHER

NHTSA's summary

LCT1000 TOW/HAUL INDICATOR INOPERATIVE WITH RPO 5G8. *KB

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Vehicles listed
CHEVROLET SILVERADO2005
GMC SIERRA2005

Listing a model year does not mean every vehicle of it is concerned: the document says which.