Chevrolet Avalanche 2003 — technical service bulletin
Bulletin 011603 · NHTSA communication 10005105 · issued Jan 16, 2003
Technical service bulletin
communication type
Power Train
component
2003
model years
7
vehicle entries
Official summary
Concerns with the service four-wheel drive light or the four-wheel drive is inoperative with a c0327 code stored in the tccm. Gm voicemail express. *tt
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.