Cadillac Escalade 1999–2005 — technical service bulletin
Bulletin 3121 · NHTSA communication 10010248 · issued Jan 1, 2004
Technical service bulletin
communication type
Engine and Engine Cooling
component
1999–2005
model years
37
vehicle entries
Official summary
Exhaust vibration resonance or moan in vehicles with gen iii v8 engines. *tc
Vehicles covered
- 2001 Cadillac Escalade
- 2002 Cadillac Escalade
- 2003 Cadillac Escalade
- 2004 Cadillac Escalade
- 2005 Cadillac Escalade
- 2001 Chevrolet Avalanche
- 2002 Chevrolet Avalanche
- 2003 Chevrolet Avalanche
- 2004 Chevrolet Avalanche
- 2005 Chevrolet Avalanche
- 2002 Chevrolet Silverado
- 2003 Chevrolet Silverado
- 2004 Chevrolet Silverado
- 2005 Chevrolet Silverado
- 2000 Chevrolet Tahoe
- 2001 Chevrolet Tahoe
- 2002 Chevrolet Tahoe
- 2003 Chevrolet Tahoe
- 2004 Chevrolet Tahoe
- 2005 Chevrolet Tahoe
- 1999 GMC Sierra
- 2000 GMC Sierra
- 2001 GMC Sierra
- 2002 GMC Sierra
- 2003 GMC Sierra
- 2004 GMC Sierra
- 2005 GMC Sierra
- 2000 GMC Yukon XL
- 2001 GMC Yukon XL
- 2002 GMC Yukon XL
- 2003 GMC Yukon XL
- 2004 GMC Yukon XL
- 2005 GMC Yukon XL
- 2003 Hummer H2
- 2004 Hummer H2
- 2005 Hummer H2
- 2004 Hummer H2 Sut
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.