TSB: BUICK 9-7X, AVALANCHE, CAMARO, CORVETTE, ENVOY, ENVOY XL, ENVOY XUV, ESCALADE, ESCALADE ESV, ESCALADE EXT, G8, GRAND PRIX, IMPALA, LACROSSE, MONTE CARLO, RAINIER, SIERRA 1500, SIERRA 2500, SIERRA DENALI, SILVERADO 1500, SILVERADO 2500, SILVERADO 3500, SUBURBAN, TAHOE, TRAILBLAZER, YUKON, YUKON DENALI, YUKON DENALI XL, YUKON XL (2005–2015)

Bulletin PIP4786B — July 14, 2015

Bulletin Details

Bulletin IDPIP4786B
ManufacturerBUICK
Models9-7X, AVALANCHE, CAMARO, CORVETTE, ENVOY, ENVOY XL, ENVOY XUV, ESCALADE, ESCALADE ESV, ESCALADE EXT, G8, GRAND PRIX, IMPALA, LACROSSE, MONTE CARLO, RAINIER, SIERRA 1500, SIERRA 2500, SIERRA DENALI, SILVERADO 1500, SILVERADO 2500, SILVERADO 3500, SUBURBAN, TAHOE, TRAILBLAZER, YUKON, YUKON DENALI, YUKON DENALI XL, YUKON XL
Model Years2005–2015
Date IssuedJuly 14, 2015
Date Added to NHTSAAugust 15, 2017
ComponentELECTRICAL SYSTEM:SOFTWARE
Vehicles Affected153 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 about vehicles that may have low oil pressure message. Technician may also find a Diagnostic Trouble Code P0521 in the Engine Control Module. Technician shoul

Affected Vehicles

MakeModelYearComponent
CHEVROLET CAMARO 2015 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET CORVETTE 2015 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE 2015 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE ESV 2015 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC SIERRA 2500 2015 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC SIERRA DENALI 2015 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SILVERADO 2500 2015 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SUBURBAN 2015 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET TAHOE 2015 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON 2015 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON XL 2015 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET CAMARO 2014 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET CORVETTE 2014 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE 2014 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE ESV 2014 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC SIERRA 1500 2014 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC SIERRA 2500 2014 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SILVERADO 1500 2014 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SILVERADO 2500 2014 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SUBURBAN 2014 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET TAHOE 2014 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON 2014 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON XL 2014 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET AVALANCHE 2013 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET CAMARO 2013 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE 2013 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE ESV 2013 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE EXT 2013 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC SIERRA 2500 2013 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC SIERRA DENALI 2013 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SILVERADO 2500 2013 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SILVERADO 3500 2013 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SUBURBAN 2013 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET TAHOE 2013 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON 2013 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON DENALI 2013 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON DENALI XL 2013 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON XL 2013 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET AVALANCHE 2012 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET CAMARO 2012 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE 2012 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE ESV 2012 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE EXT 2012 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC SIERRA 2500 2012 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC SIERRA DENALI 2012 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SILVERADO 2500 2012 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SUBURBAN 2012 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET TAHOE 2012 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON 2012 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON DENALI 2012 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON DENALI XL 2012 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON XL 2012 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET AVALANCHE 2011 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET CAMARO 2011 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE 2011 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE ESV 2011 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE EXT 2011 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC SIERRA 2500 2011 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC SIERRA DENALI 2011 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SILVERADO 1500 2011 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SILVERADO 2500 2011 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SUBURBAN 2011 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET TAHOE 2011 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON 2011 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON DENALI 2011 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON DENALI XL 2011 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON XL 2011 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET AVALANCHE 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET CAMARO 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE ESV 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE EXT 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC SIERRA 2500 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC SIERRA DENALI 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SILVERADO 1500 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SILVERADO 2500 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SUBURBAN 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET TAHOE 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON DENALI 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON DENALI XL 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON XL 2010 118000 ELECTRICAL SYSTEM:SOFTWARE
SAAB 9-7X 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET AVALANCHE 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC ENVOY 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE ESV 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE EXT 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
PONTIAC G8 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET IMPALA 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
BUICK LACROSSE 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC SIERRA 2500 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC SIERRA DENALI 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SILVERADO 1500 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SILVERADO 2500 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SUBURBAN 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET TAHOE 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET TRAILBLAZER 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON DENALI 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON DENALI XL 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON XL 2009 118000 ELECTRICAL SYSTEM:SOFTWARE
SAAB 9-7X 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET AVALANCHE 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC ENVOY 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE ESV 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE EXT 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
PONTIAC G8 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
PONTIAC GRAND PRIX 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET IMPALA 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC SIERRA 2500 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC SIERRA DENALI 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SILVERADO 1500 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SILVERADO 2500 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SUBURBAN 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET TAHOE 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET TRAILBLAZER 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON DENALI 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON DENALI XL 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON XL 2008 118000 ELECTRICAL SYSTEM:SOFTWARE
SAAB 9-7X 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET AVALANCHE 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC ENVOY 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE ESV 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
CADILLAC ESCALADE EXT 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
PONTIAC GRAND PRIX 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET IMPALA 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET MONTE CARLO 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
BUICK RAINIER 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC SIERRA 2500 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC SIERRA DENALI 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SILVERADO 1500 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SILVERADO 2500 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET SUBURBAN 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET TAHOE 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET TRAILBLAZER 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON DENALI 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON DENALI XL 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC YUKON XL 2007 118000 ELECTRICAL SYSTEM:SOFTWARE
SAAB 9-7X 2006 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC ENVOY 2006 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC ENVOY XL 2006 118000 ELECTRICAL SYSTEM:SOFTWARE
BUICK RAINIER 2006 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET TRAILBLAZER 2006 118000 ELECTRICAL SYSTEM:SOFTWARE
SAAB 9-7X 2005 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC ENVOY 2005 118000 ELECTRICAL SYSTEM:SOFTWARE
GMC ENVOY XUV 2005 118000 ELECTRICAL SYSTEM:SOFTWARE
BUICK RAINIER 2005 118000 ELECTRICAL SYSTEM:SOFTWARE
CHEVROLET TRAILBLAZER 2005 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 (PIP4786B) 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.