Chevrolet Avalanche 2007–2008 — technical service bulletin
Bulletin 08-07-30-023 · NHTSA communication 10025670 · issued May 1, 2008
Technical service bulletin
communication type
Power Train
component
2007–2008
model years
26
vehicle entries
Official summary
4l60-e/4l65-e/4l70-e automatic transmission fluid leak from oil pump or bell housing area (replace torque converter hub-to-oil pump seal assembly). Attn: this bulletin applies to vehicles built prior to december 2007. *pe
Vehicles covered
- 2007 Chevrolet Avalanche
- 2008 Chevrolet Avalanche
- 2007 Chevrolet Express
- 2008 Chevrolet Express
- 2007 Chevrolet Silverado
- 2008 Chevrolet Silverado
- 2007 Chevrolet Suburban
- 2008 Chevrolet Suburban
- 2007 Chevrolet Tahoe
- 2008 Chevrolet Tahoe
- 2008 Chevrolet Trailblazer
- 2007 Chevrolet Trailblazer 360
- 2008 GMC Envoy
- 2007 GMC Envoy 360
- 2007 GMC Savana
- 2008 GMC Savana
- 2007 GMC Sierra
- 2008 GMC Sierra
- 2007 GMC Yukon
- 2008 GMC Yukon
- 2007 GMC Yukon XL
- 2008 GMC Yukon XL
- 2007 Hummer H2
- 2008 Hummer H2
- 2007 Saab 9-7X
- 2008 Saab 9-7X
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.