Chevrolet Astro 1996–2001 — technical service bulletin
Bulletin 311001 · NHTSA communication 628070 · issued Oct 31, 2001
Technical service bulletin
communication type
Engine and Engine Cooling
component
1996–2001
model years
48
vehicle entries
Official summary
Some vehicles may exhibit an exhaust noise, rattle noise at 550 rpm. *tt
Vehicles covered
- 1996 Chevrolet Astro
- 1997 Chevrolet Astro
- 1998 Chevrolet Astro
- 1999 Chevrolet Astro
- 2000 Chevrolet Astro
- 2001 Chevrolet Astro
- 1996 Chevrolet Blazer
- 1997 Chevrolet Blazer
- 1998 Chevrolet Blazer
- 1999 Chevrolet Blazer
- 2000 Chevrolet Blazer
- 2001 Chevrolet Blazer
- 1996 Chevrolet Envoy
- 1996 Chevrolet Express
- 1997 Chevrolet Express
- 1998 Chevrolet Express
- 1999 Chevrolet Express
- 2000 Chevrolet Express
- 2001 Chevrolet Express
- 1997 GMC Envoy
- 1998 GMC Envoy
- 1999 GMC Envoy
- 2000 GMC Envoy
- 2001 GMC Envoy
- 1996 GMC Jimmy
- 1997 GMC Jimmy
- 1998 GMC Jimmy
- 1999 GMC Jimmy
- 2000 GMC Jimmy
- 2001 GMC Jimmy
- 1996 GMC Safari
- 1997 GMC Safari
- 1998 GMC Safari
- 1999 GMC Safari
- 2000 GMC Safari
- 2001 GMC Safari
- 1996 GMC Savana
- 1997 GMC Savana
- 1998 GMC Savana
- 1999 GMC Savana
- 2000 GMC Savana
- 2001 GMC Savana
- 1996 Oldsmobile Bravada
- 1997 Oldsmobile Bravada
- 1998 Oldsmobile Bravada
- 1999 Oldsmobile Bravada
- 2000 Oldsmobile Bravada
- 2001 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.