TSB: BUICK 9-3, 9-5, AURA, AVEO, CANYON, COLORADO, DTS, G6, GRAND PRIX, H2, H3, IMPALA, LACROSSE, LUCERNE, MALIBU, MONTANA, RELAY, TERRAZA, TRAILBLAZER, UPLANDER (2007–2011)

Bulletin PI1540 — October 19, 2015

Bulletin Details

Bulletin IDPI1540
ManufacturerBUICK
Models9-3, 9-5, AURA, AVEO, CANYON, COLORADO, DTS, G6, GRAND PRIX, H2, H3, IMPALA, LACROSSE, LUCERNE, MALIBU, MONTANA, RELAY, TERRAZA, TRAILBLAZER, UPLANDER
Model Years2007–2011
Date IssuedOctober 19, 2015
Date Added to NHTSADecember 21, 2017
ComponentELECTRICAL SYSTEM:SOFTWARE
Vehicles Affected72 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 informational bulletin provides diagnostic and repair information to correct a customer concern in which certain vehicles equipped with Gen 7 and OnStar, a recent over-the-air service update may have caused the OnStar syste

Affected Vehicles

MakeModelYearComponent
CHEVROLET AVEO 2011 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC CANYON 2011 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET COLORADO 2011 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC DTS 2011 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET IMPALA 2011 118000 ELECTRICAL SYSTEM:SOFTWARE
BUICK LACROSSE 2011 118000 ELECTRICAL SYSTEM:SOFTWARE
BUICK LUCERNE 2011 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET MALIBU 2011 118000 ELECTRICAL SYSTEM:SOFTWARE
SAAB 9-5 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
SATURN AURA 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET AVEO 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC CANYON 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET COLORADO 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC DTS 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
PONTIAC G6 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
HUMMER H2 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
HUMMER H3 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET IMPALA 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
BUICK LACROSSE 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
BUICK LUCERNE 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET MALIBU 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
SAAB 9-3 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
SAAB 9-5 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
SATURN AURA 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET AVEO 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC CANYON 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET COLORADO 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC DTS 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
PONTIAC G6 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
HUMMER H2 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
HUMMER H3 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET IMPALA 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
BUICK LACROSSE 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
BUICK LUCERNE 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET MALIBU 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
PONTIAC MONTANA 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET TRAILBLAZER 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET UPLANDER 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
SATURN AURA 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC CANYON 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET COLORADO 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC DTS 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
PONTIAC G6 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
PONTIAC GRAND PRIX 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
HUMMER H2 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
HUMMER H3 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET IMPALA 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
BUICK LACROSSE 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
BUICK LUCERNE 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET MALIBU 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
PONTIAC MONTANA 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
SATURN RELAY 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
BUICK TERRAZA 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET TRAILBLAZER 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET UPLANDER 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
SATURN AURA 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC CANYON 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET COLORADO 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC DTS 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
PONTIAC G6 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
PONTIAC GRAND PRIX 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
HUMMER H2 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
HUMMER H3 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET IMPALA 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
BUICK LACROSSE 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
BUICK LUCERNE 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET MALIBU 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
PONTIAC MONTANA 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
SATURN RELAY 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
BUICK TERRAZA 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET TRAILBLAZER 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET UPLANDER 2007 118000 ELECTRICAL SYSTEM:SOFTWARE

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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 (PI1540) 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.