Timing gears can cause knocking sound on GMC Sonoma

Timing gears may wear causing a mild to severe knocking noise from the front of the engine. Replacement of the timing gears is necessary.
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Average mileage: (–)
Engine affected: 2.5L 4 Cylinder
3 model years affected: 1991, 1992, 1993
3 people reported this problem
0 people shared problem details
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