Chevrolet Trailblazer 2003 — technical service bulletin

Bulletin 030139013 · NHTSA communication 10005552 · issued Nov 1, 2003

Technical service bulletin

communication type

Equipment

component

2003

model years

vehicle entries

Official summary

Revised mode actuator replacement procedure. *tt

Vehicles covered

2003 Chevrolet Trailblazer
2003 GMC Envoy
2003 Isuzu Ascender
2003 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.