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Home >> Chevrolet >> 2006 >> Silverado 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 880 (Engine Controls And Fuel - 4.8L, 5.3L, 6.0L And 6.2L - Introduction (2 Of 2)) >> Description and Operation >> Electronic Ignition (EI) System Description >> Camshaft Reluctor Wheel

Camshaft Reluctor Wheel

WARNING: This page is about a different car, the 2007 GMC Sierra, 2007 GMC Cab & Chassis Sierra, 2007 Chevrolet Silverado, and 2007 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The camshaft reluctor wheel is part of the camshaft gear. The reluctor wheel contains a pattern of 2 narrow teeth, and 2 wide teeth around the circumference of the wheel. The falling or trailing edges of the 4 teeth are evenly spaced at 90 degrees apart. The engine control module (ECM) recognizes the narrow and wide tooth patterns to identify camshaft position, or which cylinder is in compression, and which is in exhaust. The ECM also uses the reluctor wheel information to determine the camshaft relative position to the crankshaft position.

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