2012 Chevrolet Silverado 1500 Questions

All 2012 Chevrolet Silverado 1500 Questions

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Worked 1 week. Came on again-check gas lid-took to 3 different auto supplies stores-registered oil press switch,Now dealership trying to fix after 400.00
Ticking coming from the engine. Only at idle does it tick. Have heard the oil pump has a problem with it. Not the lifters, valves or cam. If anyone has had this problem fixed I would like to know