Chevrolet Avalanche 2003 — technical service bulletin
Bulletin 3040 · NHTSA communication 10009377 · issued Jan 1, 2004
Technical service bulletin
communication type
Engine and Engine Cooling
component
2003
model years
5
vehicle entries
Official summary
Service engine soon light and / or reduced engine power mode due to diagnostic trouble codes p0120, p0220, p1516 and/or p1518. This condition is normally very intermittent. *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.