Intake Valve
Fits Sierra 1500 Base Model; Trans.Code 4L65-E; Electronic Throttle Control (KUP), California Emissions LEV (NC1), Federal Emission System (NF2); 4 Speed Automatic Trans.or Sierra 1500 HD; Trans.Code 4L80-E; Exc. Natural Gas Conversion (KL5); 4 Speed Automatic Trans.