Standard Ignition SK77 Fuel Injector Seal Kit

Fuel Injector Seal Kit for Rail Pack Service

Standard Ignition SK77 is a fuel injector seal kit for rail pack applications that need renewed injector sealing at the fuel rail. It is built with rubber seals in brown and blue, with OE-style dimensions for a direct service replacement on supported Chevrolet, GMC, Buick, Pontiac, Saturn, Saab, Hummer, and related applications.

Compatible With 2006-2019 Chevrolet Silverado, Express, Impala, Malibu, Avalanche, Suburban, Trailblazer, Uplander, Colorado, Monte Carlo, and more; also used on select GMC Sierra, Canyon, Envoy, Yukon XL, Buick Lucerne and Terraza, Pontiac G6 and Montana, Saturn Aura and Relay, Saab 9-7x, and Hummer H3 applications. Standard Ignition SK77 is built for rail pack fuel injector seal service where injector O-rings need replacement during maintenance or repair.

• Fuel injector seal kit for rail pack service
• Rubber construction with brown and blue seals
• Designed for 8 injectors covered per kit
• Includes 16 O-rings
• OE-spec dimensions for supported fuel rail applications
• No hardware, pintle cap, nozzle seal, or upper intake manifold gaskets included

This kit uses four O-ring/seal sizes with 6.604 mm inside diameter seals, 14.478 mm outside diameter seals, and 4.064 mm thickness seals, plus 10.16 mm inside diameter seals with 13.97 mm outside diameter and 2.286 mm thickness. Standard Ignition SK77 is intended for fuel injector seal replacement where aging rubber can harden, leak, or lose sealing integrity at the rail pack connection. This part cross-references MAHLE GS33661 for the same application.

What It Helps Repair

• Fuel seepage at injector-to-rail sealing points
• Hard starting caused by injector seal leakage
• Fuel odor from deteriorated O-rings
• Rough idle related to vacuum or fuel sealing loss
• Service issues during injector or rail pack maintenance

Installation Notes

Clean the injector and rail sealing surfaces before installation and inspect the injector bores for wear or damage. Lubricate new O-rings with clean engine oil or approved assembly lubricant during installation to reduce tearing and help the seals seat correctly. Verify the application by year, make, model, and rail pack configuration before service. Fits 2009-2019 Chevrolet Express 2500, N/A; Fits 2009-2019 Chevrolet Express 3500, N/A; Fits 2009-2019 Chevrolet Silverado 2500 HD, N/A; Fits 2009-2019 Chevrolet Silverado 3500 HD, N/A; Fits 2009-2019 GMC Sierra 2500 HD, N/A; Fits 2009-2019 GMC Sierra 3500 HD, N/A; Fits 2010-2013 Chevrolet Silverado 1500, N/A; Fits 2008-2012 Chevrolet Colorado, N/A; Fits 2008-2012 GMC Canyon, N/A; Fits 2006-2011 Chevrolet Impala, N/A; Fits 2009-2010 Chevrolet Malibu, N/A; Fits 2009-2010 Pontiac G6, N/A; Fits 2009 Buick Lucerne, N/A; Fits 2009 Chevrolet Avalanche, N/A; Fits 2009 Chevrolet Silverado 1500, N/A; Fits 2009 Chevrolet Suburban 1500, N/A; Fits 2009 Chevrolet Suburban 2500, N/A; Fits 2008-2009 Chevrolet Trailblazer, N/A; Fits 2006-2009 Chevrolet Uplander, N/A; Fits 2008-2009 GMC Envoy, N/A; Fits 2009 GMC Sierra 1500, N/A; Fits 2009 GMC Yukon XL 1500, N/A; Fits 2009 GMC Yukon XL 2500, N/A; Fits 2008-2009 Hummer H3, N/A; Fits 2006-2008 Chevrolet Malibu, N/A; Fits 2006-2008 Pontiac G6, N/A; Fits 2008 Saab 9-7x, N/A; Fits 2008 Saturn Aura, N/A; Fits 2006-2007 Buick Terraza, N/A; Fits 2006-2007 Chevrolet Monte Carlo, N/A; Fits 2006-2007 Pontiac Montana, N/A; Fits 2007 Saturn Aura, N/A; Fits 2006-2007 Saturn Relay, N/A.

Quality Assurance

Standard Ignition states that its products are tested and inspected in an ISO 9000-compliant environment and engineered to meet or exceed OE specifications. SK77 is designed with service-focused fit and sealing performance for supported fuel injector applications.