My truck's idling up and down when just sitting, the check engine light comes on and goes off. Loss of power and bad gas mileage. What can the problem consists of
What is your question?
Rough idling, loss of power, decrease in gas mileage per gal, check engine light comes on and goes off
What makes this problem better or worse?
Running the truck, instead of sitting in one spot
How long has your 2013 GMC Sierra 1500 had this problem?
RepairPal Certified shops can diagnose and repair your 2013 GMC Sierra 1500. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Idling that goes up and down and fuel economy issues sounds like an air-fuel mixture issue. Too much air, too much fuel, perhaps both. Why? Can't be sure until testing is performed. Could be an emissions concern rolled in as well; too hard to know without testing the vehicle. There will be clear signs of what's going on when testing is performed.
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www.repairpal.com/repair-shops
