Chevrolet Astro 2001 — technical service bulletin
Bulletin 01-601 · NHTSA communication 619762 · issued Jun 1, 2001
Technical service bulletin
communication type
Power Train
component
2001
model years
17
vehicle entries
Official summary
Subject regarding investigation of harsh shifts on 4l60e automatic transmission. *tt
Vehicles covered
- 2001 Chevrolet Astro
- 2001 Chevrolet Blazer
- 2001 Chevrolet Camaro
- 2001 Chevrolet Corvette
- 2001 Chevrolet Express
- 2001 Chevrolet S10
- 2001 Chevrolet Silverado
- 2001 Chevrolet Suburban
- 2001 Chevrolet Tahoe
- 2001 GMC Envoy
- 2001 GMC Jimmy
- 2001 GMC Safari
- 2001 GMC Savana
- 2001 GMC Sierra
- 2001 GMC Sonoma
- 2001 GMC Yukon
- 2001 GMC Yukon XL
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.