Chevrolet Avalanche 2003 — technical service bulletin
Bulletin 00690B · NHTSA communication 10004247 · issued Nov 18, 2003
Technical service bulletin
communication type
Electrical System
component
2003
model years
7
vehicle entries
Official summary
Diagnostic trouble code c0327 with or without additional diagnostic trouble codes (dtcs) setting. *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.