Chevrolet Astro 1991 — technical service bulletin
Bulletin RCL/91C50 · NHTSA communication 38076 · issued Feb 1, 1995
Technical service bulletin
communication type
Engine and Engine Cooling
component
1991
model years
6
vehicle entries
Official summary
California recall - general motors has determined that certain 1991 c/k trucks, m/l and g vans with 4.3l engines may be emitting non-methane hydrocarbons in excess of california emission standards. To correct this condition, dealers are to install a new exhaust oxygen sensor. *tw
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.