Chevrolet Astro 1993–1994 — technical service bulletin
Bulletin 468203A · NHTSA communication 45821 · issued Jun 1, 1995
Technical service bulletin
communication type
Electrical System
component
1993–1994
model years
4
vehicle entries
Official summary
Inoperative or erratic speedometer and/or vehicle shifts down into second gear or will not shift out of second gear (replace connector c240). *sd
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.