Chevrolet C Series 1998–1999 — technical service bulletin
Bulletin 866503 · NHTSA communication 615078 · issued Jul 1, 1998
Technical service bulletin
communication type
Engine and Engine Cooling
component
1998–1999
model years
33
vehicle entries
Official summary
Some vehicles may set a false obd ii with diagnostic trouble code p1404. *tt
Vehicles covered
- 1998 Chevrolet C Series
- 1999 Chevrolet C Series
- 1998 Chevrolet G Series
- 1999 Chevrolet G Series
- 1998 Chevrolet K Series
- 1999 Chevrolet K Series
- 1998 Chevrolet L Series
- 1999 Chevrolet L Series
- 1998 Chevrolet M Series
- 1999 Chevrolet M Series
- 1998 Chevrolet P Series
- 1999 Chevrolet P Series
- 1998 Chevrolet S Series
- 1999 Chevrolet S Series
- 1998 Chevrolet T Series
- 1999 Chevrolet T Series
- 1999 Ford L Series
- 1998 GMC C Series
- 1999 GMC C Series
- 1998 GMC G Series
- 1999 GMC G Series
- 1998 GMC K Series
- 1999 GMC K Series
- 1998 GMC L Series
- 1998 GMC M Series
- 1999 GMC M Series
- 1998 GMC P Series
- 1999 GMC P Series
- 1998 GMC S Series
- 1999 GMC S Series
- 1998 GMC T Series
- 1999 GMC T Series
- 1998 Oldsmobile Bravada
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.