Chevrolet C Series(light) 1994–1996 — technical service bulletin
Bulletin 677153A · NHTSA communication 52572 · issued Jun 1, 1997
Technical service bulletin
communication type
Electrical System
component
1994–1996
model years
20
vehicle entries
Official summary
No upshift/2nd gear only after cold start-intermittent dtc 87 - high ratio error (replace eprom). *tw
Vehicles covered
- 1994 Chevrolet C Series(light)
- 1995 Chevrolet C Series(light)
- 1994 Chevrolet G Series
- 1995 Chevrolet G Series
- 1996 Chevrolet G Series
- 1994 Chevrolet K Series
- 1995 Chevrolet K Series
- 1994 Chevrolet P Series
- 1995 Chevrolet P Series
- 1996 Chevrolet P Series
- 1994 GMC C Series(light)
- 1995 GMC C Series(light)
- 1994 GMC G Series
- 1995 GMC G Series
- 1996 GMC G Series
- 1994 GMC K Series
- 1995 GMC K Series
- 1994 GMC P Series
- 1995 GMC P Series
- 1996 GMC P Series
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.