Chevrolet Astro 2003–2004 — technical service bulletin
Bulletin 3048A · NHTSA communication 10017154 · issued Oct 26, 2005
Technical service bulletin
communication type
Engine and Engine Cooling
component
2003–2004
model years
20
vehicle entries
Official summary
Supplement to 03-06-01-024b 4.3l lu3 l35 timing chain tensioner. Rattle-type noise coming from the engine at approximately 1800 to 2200 rpms. *tt
Vehicles covered
- 2003 Chevrolet Astro
- 2004 Chevrolet Astro
- 2003 Chevrolet Blazer
- 2004 Chevrolet Blazer
- 2003 Chevrolet Express
- 2004 Chevrolet Express
- 2003 Chevrolet S10
- 2004 Chevrolet S10
- 2003 Chevrolet Silverado
- 2004 Chevrolet Silverado
- 2003 GMC Jimmy
- 2004 GMC Jimmy
- 2003 GMC Safari
- 2004 GMC Safari
- 2003 GMC Savana
- 2004 GMC Savana
- 2003 GMC Sierra
- 2004 GMC Sierra
- 2003 GMC Sonoma
- 2004 GMC Sonoma
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.