Replacement Part Number: 12570800, 12679525, 217-2293, 977-307 . Compatible with Chevy Avalanche 1500 2003-06 Compatible with Express 2004-07 1500-3500 Compatible with Silverado 2004-07 1500-3500 Compatible with Suburban 2003-06 1500-2500 Compatible with Tahoe 2003-06 Compatible with Bulck Rainier 2004 Compatible with Cadillac Escalade ESV/EXT 2003-06 Compatible with Hummer H2 2003-07 Compatible with GMC Envoy XL/XUV 2003-04 Compatible with Savana 2003-07 1500-3500 Compatible with Sierra 2003-07 1500-3500 Compatible with Yukon XL 2003-06 1500-2500 Throttle Body Matching (Choose One Method) 1. Key Cycle Method Turn ignition on, fully depress and hold the gas pedal, then release. Start the engine. 2. Diagnostic Tool Method With engine at operating temperature (90°C), use the diagnostic tool to run the electronic throttle adaptation. Please confirm compatibility and OEM number before purchase. If any issues, contact us for support.