General Motors 12613455 VVT Oil Control Valve Assembly

The 12613455 is a camshaft position actuator solenoid (VVT oil control valve) designed for General Motors Northstar V8 applications. It modulates oil flow to the variable valve timing phaser, enabling dynamic adjustment of intake and exhaust camshaft timing. The solenoid operates on 12V vehicle electrical system and mounts directly to the cylinder head with a single bolt pattern. Internal plunger and spring assembly calibrated to OEM specifications for precise oil pressure control across engine speed and load range. Supersedes part number 12576969. Direct replacement for factory-installed unit on Cadillac RWD and AWD platforms equipped with 4.6L LD8/L37 or 4.4L Northstar engines. Construction features stainless steel valve body, viton seals rated for engine oil temperatures up to 150°C, and two-pin weatherproof electrical connector. Threaded oil port interfaces with cylinder head gallery. No programming or adaptation required after installation. Service life typically exceeds 100,000 miles under normal maintenance intervals with clean engine oil.