Product Description
Genuine GM 12639250 LS Rear Engine Cover
Complete OEM Rear Cover with Main Seal, Gasket & Bolts for LS Engines
The Genuine GM 12639250 LS Rear Engine Cover is the updated OEM solution for a known LS engine issue where early factory rear covers can suffer from porosity or cracking, causing oil leaks that often appear identical to rear main seal failures. This revised GM design eliminates those concerns and includes a pre-installed rear main seal, rear cover gasket, and mounting bolts, making replacement efficient and reliable. Replacing the rear cover at the same time as the main seal helps prevent repeat repairs and ensures long-term leak-free operation on factory LS blocks.
Key Features & Benefits
- Updated GM Casting: Eliminates porosity and cracking issues found in earlier LS rear engine covers.
- Complete Service Assembly: Includes rear cover, gasket, rear main seal, and mounting bolts for a clean, one-step installation.
- OEM GM Fit & Reliability: Manufactured to GM specifications for proper sealing, alignment, and durability.
- Prevents Repeat Labor: Ideal to replace anytime the rear main seal is serviced to avoid misdiagnosed leaks.
- Factory LS Block Compatibility: Fits all factory LS engine blocks (not compatible with aftermarket LSX blocks).
Kit Includes
- Genuine GM Rear Engine Cover
- Rear Main Seal (Pre-Installed)
- Rear Cover Gasket
- Mounting Bolts
Key Fitments
- Fits all LS-Based V8 Engines: 4.8L, 5.3L, 5.7L, 6.0L, 6.2L
- LS1 LS2 LS3 LS6 LM7 L33 LFA LSA LH6 LQ4 LQ9 L76 L77 L92 L99 L96 LC9 LY6 LMG LH8
Applications Include (Gasoline V8 Models Only)
- BUICK RAINIER 2004-2007
- CADILLAC CTS-V 2004-2015
- CADILLAC ESCALADE 2002-2014
- CHEVROLET AVALANCHE 2007-2013
- CHEVROLET AVALANCHE 1500 2002-2006
- CHEVROLET CAMARO 1998-2015
- CHEVROLET CAPRICE 2011-2012
- CHEVROLET CHEYENNE 2013
- CHEVROLET COLORADO 2010-2012
- CHEVROLET CORVETTE 1997-2013
- CHEVROLET EXPRESS 1500 2003-2012
- CHEVROLET EXPRESS 2500 2003-2020
- CHEVROLET EXPRESS 3500 2003-2020
- CHEVROLET EXPRESS 4500 2009-2018
- CHEVROLET IMPALA SS 2006-2009
- CHEVROLET LCF 2016-2019
- CHEVROLET MONTE CARLO SS 2007
- CHEVROLET SILVERADO 1500 1999-2013
- CHEVROLET SILVERADO 2500 1999-2019
- CHEVROLET SILVERADO 3500 2001-2019
- CHEVROLET SSR 2003-2006
- CHEVROLET SUBURBAN 1500 2000-2014
- CHEVROLET SUBURBAN 2500 2000-2011
- CHEVROLET TAHOE 2000-2014
- CHEVROLET TRAILBLAZER 2003-2009
- GMC CANYON 2009-2012
- GMC ENVOY 2004-2009
- GMC SAVANA 1500 2003-2013
- GMC SAVANA 2500 2003-2020
- GMC SAVANA 3500 2003-2020
- GMC SAVANA 4500 2009-2019
- GMC SIERRA 1500 1999-2014
- GMC SIERRA 2500 2000-2016
- GMC SIERRA 3500 2001-2018
- GMC YUKON 2000-2014
- GMC YUKON XL 1500 2000-2014
- GMC YUKON XL 2500 2000-2013
- HUMMER H2 2003-2009
- HUMMER H3 2008-2010
- ISUZU NPR 2003-2016
- PONTIAC FIREBIRD 1998-2002
- PONTIAC G8 2008-2009
- PONTIAC GTO 2004-2006
- SAAB 9-7X 2007-2009
