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 ID | PIP4786B |
| Manufacturer | BUICK |
| Models | 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 |
| Model Years | 2005–2015 |
| Date Issued | July 14, 2015 |
| Date Added to NHTSA | August 15, 2017 |
| Component | ELECTRICAL SYSTEM:SOFTWARE |
| Vehicles Affected | 153 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
| Make | Model | Year | Component |
|---|---|---|---|
| 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 |
Related BUICK Recalls
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.