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The Timing Chain in GMC Sonoma automobile is essential in maintaining the correct phase of rotation of the camshaft and crankshaft in the vehicle's engine. This metal chain sits in front of the motor as a replacement for the time consuming and more often replaced rubber timing belts. Problems may develop from inadequate lubrication of the timing chain and a broken or worn tensioner; this results to a rattle noise coming from the engine. While in cam engines, it is common to use a short chain drive when compared with a gear drive as a result of torque reversal due to cam profiles, a preference that is more suitable to the pushrod engines.