TSB: BUICK AVALANCHE, AZTEK, ENVOY, ESCALADE, H2, RAINIER, RENDEZVOUS, SIERRA, SILVERADO, SUBURBAN, TAHOE, TRAILBLAZER, YUKON (1999-2005)

Bulletin 3086 - January 1, 2004

Bulletin Details

Bulletin ID3086
ManufacturerBUICK
ModelsAVALANCHE, AZTEK, ENVOY, ESCALADE, H2, RAINIER, RENDEZVOUS, SIERRA, SILVERADO, SUBURBAN, TAHOE, TRAILBLAZER, YUKON
Model Years1999-2005
Date IssuedJanuary 1, 2004
Date Added to NHTSANovember 4, 2004
ComponentENGINE AND ENGINE COOLING:ENGINE
Vehicles Affected82 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

AIR CONDITIONER (A/C) LOW PRESSURE SWITCH DIAGNOSTIC TOOL. CURRENTLY THE A/C LOW PRESSURE SWITCH OPEN/CLOSE PRESSURES CANNOT BE ACCURATELY DETERMINED BY MEASURING PRESSURE AT THE LOW SIDE SERVICE PORT. *TT

Affected Vehicles

MakeModelYearComponent
CHEVROLET AVALANCHE 2005 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CADILLAC ESCALADE 2005 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
GMC SIERRA 2005 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET SILVERADO 2005 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET SUBURBAN 2005 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET TAHOE 2005 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
GMC YUKON 2005 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET AVALANCHE 2004 061000 ENGINE AND ENGINE COOLING:ENGINE
CHEVROLET AVALANCHE 2004 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
PONTIAC AZTEK 2004 110000 ELECTRICAL SYSTEM
GMC ENVOY 2004 061000 ENGINE AND ENGINE COOLING:ENGINE
CADILLAC ESCALADE 2004 061000 ENGINE AND ENGINE COOLING:ENGINE
CADILLAC ESCALADE 2004 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
HUMMER H2 2004 061000 ENGINE AND ENGINE COOLING:ENGINE
BUICK RAINIER 2004 061000 ENGINE AND ENGINE COOLING:ENGINE
BUICK RENDEZVOUS 2004 110000 ELECTRICAL SYSTEM
GMC SIERRA 2004 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
GMC SIERRA 2004 061000 ENGINE AND ENGINE COOLING:ENGINE
CHEVROLET SILVERADO 2004 061000 ENGINE AND ENGINE COOLING:ENGINE
CHEVROLET SILVERADO 2004 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET SUBURBAN 2004 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET SUBURBAN 2004 061000 ENGINE AND ENGINE COOLING:ENGINE
CHEVROLET TAHOE 2004 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET TAHOE 2004 061000 ENGINE AND ENGINE COOLING:ENGINE
CHEVROLET TRAILBLAZER 2004 061000 ENGINE AND ENGINE COOLING:ENGINE
GMC YUKON 2004 061000 ENGINE AND ENGINE COOLING:ENGINE
GMC YUKON 2004 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET AVALANCHE 2003 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET AVALANCHE 2003 061000 ENGINE AND ENGINE COOLING:ENGINE
PONTIAC AZTEK 2003 110000 ELECTRICAL SYSTEM
GMC ENVOY 2003 061000 ENGINE AND ENGINE COOLING:ENGINE
CADILLAC ESCALADE 2003 061000 ENGINE AND ENGINE COOLING:ENGINE
CADILLAC ESCALADE 2003 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
HUMMER H2 2003 061000 ENGINE AND ENGINE COOLING:ENGINE
BUICK RENDEZVOUS 2003 110000 ELECTRICAL SYSTEM
GMC SIERRA 2003 061000 ENGINE AND ENGINE COOLING:ENGINE
GMC SIERRA 2003 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET SILVERADO 2003 061000 ENGINE AND ENGINE COOLING:ENGINE
CHEVROLET SILVERADO 2003 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET SUBURBAN 2003 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET SUBURBAN 2003 061000 ENGINE AND ENGINE COOLING:ENGINE
CHEVROLET TAHOE 2003 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET TAHOE 2003 061000 ENGINE AND ENGINE COOLING:ENGINE
CHEVROLET TRAILBLAZER 2003 061000 ENGINE AND ENGINE COOLING:ENGINE
GMC YUKON 2003 061000 ENGINE AND ENGINE COOLING:ENGINE
GMC YUKON 2003 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET AVALANCHE 2002 061000 ENGINE AND ENGINE COOLING:ENGINE
CHEVROLET AVALANCHE 2002 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
PONTIAC AZTEK 2002 110000 ELECTRICAL SYSTEM
CADILLAC ESCALADE 2002 061000 ENGINE AND ENGINE COOLING:ENGINE
CADILLAC ESCALADE 2002 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
BUICK RENDEZVOUS 2002 110000 ELECTRICAL SYSTEM
GMC SIERRA 2002 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
GMC SIERRA 2002 061000 ENGINE AND ENGINE COOLING:ENGINE
CHEVROLET SILVERADO 2002 061000 ENGINE AND ENGINE COOLING:ENGINE
CHEVROLET SILVERADO 2002 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET SUBURBAN 2002 061000 ENGINE AND ENGINE COOLING:ENGINE
CHEVROLET SUBURBAN 2002 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET TAHOE 2002 061000 ENGINE AND ENGINE COOLING:ENGINE
CHEVROLET TAHOE 2002 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
GMC YUKON 2002 061000 ENGINE AND ENGINE COOLING:ENGINE
GMC YUKON 2002 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET AVALANCHE 2001 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CADILLAC ESCALADE 2001 061000 ENGINE AND ENGINE COOLING:ENGINE
GMC SIERRA 2001 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
GMC SIERRA 2001 061000 ENGINE AND ENGINE COOLING:ENGINE
CHEVROLET SILVERADO 2001 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET SILVERADO 2001 061000 ENGINE AND ENGINE COOLING:ENGINE
CHEVROLET SUBURBAN 2001 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET SUBURBAN 2001 061000 ENGINE AND ENGINE COOLING:ENGINE
CHEVROLET TAHOE 2001 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET TAHOE 2001 061000 ENGINE AND ENGINE COOLING:ENGINE
GMC YUKON 2001 061000 ENGINE AND ENGINE COOLING:ENGINE
GMC YUKON 2001 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET AVALANCHE 2000 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
GMC SIERRA 2000 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET SILVERADO 2000 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET SUBURBAN 2000 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET TAHOE 2000 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
GMC YUKON 2000 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
GMC SIERRA 1999 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET SILVERADO 1999 357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER

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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 (3086) 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.

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.