4WD switch indicator lights flashing, 4WD inoperative, diagnostic trouble codes C0327, P0550 set
Chevrolet technical service bulletin 040421004 for 2002-2005 Chevrolet Trailblazer, 2002-2005 GMC Envoy and 2002-2004 Oldsmobile Bravada and others.
- Bulletin number
- 040421004
- Component
- Power train: transfer case (4-wheel drive)
- Summary
- 4wd switch indicator lights flashing, 4wd inoperative, diagnostic trouble codes c0327, p0550 set. Tt
Owners of these vehicles have filed 757 complaints in the transmission category.
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