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TSB: BUICK 9-7X, AVALANCHE, BLAZER, BRAVADA, DENALI, ENVOY, ESCALADE, ESCALADE ESV, ESCALADE EXT, H2, H2 SUT, H3, JIMMY, RAINIER, SIERRA, SILVERADO, SONOMA, SUBURBAN, TRAILBLAZER, YUKON (2000-2006)

Bulletin PIT-4722 - October 1, 2008

Bulletin Details

Bulletin IDPIT-4722
ManufacturerBUICK
Models9-7X, AVALANCHE, BLAZER, BRAVADA, DENALI, ENVOY, ESCALADE, ESCALADE ESV, ESCALADE EXT, H2, H2 SUT, H3, JIMMY, RAINIER, SIERRA, SILVERADO, SONOMA, SUBURBAN, TRAILBLAZER, YUKON
Model Years2000-2006
Date IssuedOctober 1, 2008
Date Added to NHTSADecember 18, 2008
ComponentPOWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
Vehicles Affected107 combinations

What is a TSB?

A Technical Service Bulletin is a document issued by the vehicle manufacturer to inform dealership technicians about a known issue and the recommended repair procedure. TSBs are not mandatory recalls, they serve as repair guidance for common problems.

If your vehicle has this issue, bring this bulletin ID to your dealer. If under warranty, the repair should be covered at no cost.

Summary

GMC: FLUID LEAK FROM TRANSMISSION OIL COOLER LINES DUE TO CORROSION. ALL 2000-2006 LIGHT DUTY TRUCKS EQUIPPED WITH THE LIGHT DUTY AUTOMATIC TRANSMISSION. *PE

Affected Vehicles

MakeModelYearComponent
SAAB 9-7X 2006 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET AVALANCHE 2006 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET BLAZER 2006 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC ENVOY 2006 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CADILLAC ESCALADE 2006 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CADILLAC ESCALADE ESV 2006 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CADILLAC ESCALADE EXT 2006 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
HUMMER H2 2006 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
HUMMER H2 SUT 2006 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
HUMMER H3 2006 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
BUICK RAINIER 2006 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC SIERRA 2006 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET SILVERADO 2006 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC SONOMA 2006 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET SUBURBAN 2006 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET TRAILBLAZER 2006 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC YUKON 2006 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
SAAB 9-7X 2005 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET AVALANCHE 2005 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET BLAZER 2005 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC ENVOY 2005 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CADILLAC ESCALADE 2005 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CADILLAC ESCALADE ESV 2005 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CADILLAC ESCALADE EXT 2005 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
HUMMER H2 2005 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
HUMMER H2 SUT 2005 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
HUMMER H3 2005 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
BUICK RAINIER 2005 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC SIERRA 2005 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET SILVERADO 2005 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC SONOMA 2005 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET SUBURBAN 2005 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET TRAILBLAZER 2005 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC YUKON 2005 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET AVALANCHE 2004 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET BLAZER 2004 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
OLDSMOBILE BRAVADA 2004 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC ENVOY 2004 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CADILLAC ESCALADE 2004 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CADILLAC ESCALADE ESV 2004 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CADILLAC ESCALADE EXT 2004 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
HUMMER H2 2004 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
HUMMER H2 SUT 2004 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
HUMMER H3 2004 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC JIMMY 2004 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
BUICK RAINIER 2004 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC SIERRA 2004 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET SILVERADO 2004 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC SONOMA 2004 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET SUBURBAN 2004 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET TRAILBLAZER 2004 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC YUKON 2004 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET AVALANCHE 2003 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET BLAZER 2003 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
OLDSMOBILE BRAVADA 2003 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC DENALI 2003 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC ENVOY 2003 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CADILLAC ESCALADE 2003 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CADILLAC ESCALADE ESV 2003 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CADILLAC ESCALADE EXT 2003 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC JIMMY 2003 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC SIERRA 2003 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET SILVERADO 2003 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC SONOMA 2003 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET SUBURBAN 2003 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET TRAILBLAZER 2003 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC YUKON 2003 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET AVALANCHE 2002 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET BLAZER 2002 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
OLDSMOBILE BRAVADA 2002 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC DENALI 2002 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC ENVOY 2002 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CADILLAC ESCALADE 2002 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CADILLAC ESCALADE EXT 2002 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC JIMMY 2002 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC SIERRA 2002 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET SILVERADO 2002 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC SONOMA 2002 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET SUBURBAN 2002 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET TRAILBLAZER 2002 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC YUKON 2002 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET AVALANCHE 2001 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET BLAZER 2001 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
OLDSMOBILE BRAVADA 2001 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC DENALI 2001 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC ENVOY 2001 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CADILLAC ESCALADE 2001 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC JIMMY 2001 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC SIERRA 2001 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET SILVERADO 2001 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC SONOMA 2001 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET SUBURBAN 2001 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET TRAILBLAZER 2001 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC YUKON 2001 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET AVALANCHE 2000 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET BLAZER 2000 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
OLDSMOBILE BRAVADA 2000 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC DENALI 2000 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC ENVOY 2000 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CADILLAC ESCALADE 2000 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC JIMMY 2000 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC SIERRA 2000 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET SILVERADO 2000 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC SONOMA 2000 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET SUBURBAN 2000 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
CHEVROLET TRAILBLAZER 2000 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES
GMC YUKON 2000 103600 POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES

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What Should You Do?

If your vehicle is affected by this TSB, contact your authorized BUICK dealer. Bring this bulletin ID (PIT-4722) when you visit. If under warranty, the repair should be free. If your warranty has expired, ask about goodwill coverage, manufacturers sometimes cover TSB-related repairs beyond the warranty period.

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Frequently Asked Questions

A recall is a mandatory safety fix, the manufacturer must repair every affected vehicle for free. A TSB is an advisory document that describes a known issue and the recommended fix, but repairs are not required. However, some TSBs eventually lead to recalls if the issue poses a safety risk. TSBs are generally issued for quality or performance problems, while recalls address safety defects.

If your vehicle is still under the manufacturer's warranty, TSB-related repairs are typically covered at no cost. If your warranty has expired, you can ask the dealer about goodwill or customer assistance programs. Many manufacturers will cover or partially cover repairs for well-known issues, especially if the TSB was issued recently or affects a large number of vehicles.

Check the make, model, and model year listed above against your vehicle. If they match, this bulletin likely applies. However, TSBs may only affect vehicles with specific production dates, VIN ranges, or configurations. Your dealer can confirm by entering your VIN into their service system, which will show all applicable TSBs and recalls.

This data comes from the National Highway Traffic Safety Administration (NHTSA). Manufacturers are required to submit copies of all communications (including TSBs) sent to their dealers to NHTSA. The agency makes this data publicly available as part of its vehicle safety monitoring program.

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