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TSB: BUICK ENVOY, ENVOY XL, ENVOY XL 370, ENVOY XUV, RAINIER, TRAILBLAZER, TRAILBLAZER EXT, TRAILBLAZER EXT 370 (2002–2009)

Bulletin PIT3033B — October 18, 2022

Bulletin Details

Bulletin IDPIT3033B
ManufacturerBUICK
ModelsENVOY, ENVOY XL, ENVOY XL 370, ENVOY XUV, RAINIER, TRAILBLAZER, TRAILBLAZER EXT, TRAILBLAZER EXT 370
Model Years2002–2009
Date IssuedOctober 18, 2022
Date Added to NHTSANovember 21, 2022
ComponentENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
Vehicles Affected62 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

This Preliminary Information communication provides information to the technician that the Cam gear alignment can be incorrect after replacing the HVAC mode actuator.

Affected Vehicles

MakeModelYearComponent
GMC ENVOY 2009 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
GMC ENVOY 2009 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
CHEVROLET TRAILBLAZER 2009 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
CHEVROLET TRAILBLAZER 2009 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
GMC ENVOY 2008 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
GMC ENVOY 2008 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
CHEVROLET TRAILBLAZER 2008 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
CHEVROLET TRAILBLAZER 2008 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
GMC ENVOY 2007 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
GMC ENVOY 2007 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
BUICK RAINIER 2007 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
BUICK RAINIER 2007 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
CHEVROLET TRAILBLAZER 2007 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
CHEVROLET TRAILBLAZER 2007 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
GMC ENVOY 2006 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
GMC ENVOY 2006 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
GMC ENVOY XL 2006 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
GMC ENVOY XL 2006 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
BUICK RAINIER 2006 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
BUICK RAINIER 2006 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
CHEVROLET TRAILBLAZER 2006 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
CHEVROLET TRAILBLAZER 2006 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
CHEVROLET TRAILBLAZER EXT 2006 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
CHEVROLET TRAILBLAZER EXT 2006 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
GMC ENVOY 2005 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
GMC ENVOY 2005 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
GMC ENVOY XL 370 2005 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
GMC ENVOY XL 370 2005 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
GMC ENVOY XUV 2005 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
GMC ENVOY XUV 2005 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
BUICK RAINIER 2005 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
BUICK RAINIER 2005 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
CHEVROLET TRAILBLAZER 2005 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
CHEVROLET TRAILBLAZER 2005 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
CHEVROLET TRAILBLAZER EXT 370 2005 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
CHEVROLET TRAILBLAZER EXT 370 2005 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
GMC ENVOY 2004 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
GMC ENVOY 2004 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
GMC ENVOY XL 2004 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
GMC ENVOY XL 2004 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
GMC ENVOY XUV 2004 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
GMC ENVOY XUV 2004 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
BUICK RAINIER 2004 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
BUICK RAINIER 2004 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
CHEVROLET TRAILBLAZER 2004 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
CHEVROLET TRAILBLAZER 2004 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
CHEVROLET TRAILBLAZER EXT 2004 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
CHEVROLET TRAILBLAZER EXT 2004 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
GMC ENVOY 2003 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
GMC ENVOY 2003 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
GMC ENVOY XL 2003 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
GMC ENVOY XL 2003 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
GMC ENVOY XUV 2003 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
GMC ENVOY XUV 2003 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
CHEVROLET TRAILBLAZER 2003 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
CHEVROLET TRAILBLAZER 2003 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
CHEVROLET TRAILBLAZER EXT 2003 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
CHEVROLET TRAILBLAZER EXT 2003 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
GMC ENVOY 2002 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
GMC ENVOY 2002 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
GMC ENVOY XL 2002 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
GMC ENVOY XL 2002 061700 ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR

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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 (PIT3033B) 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.

Back to All TSBs