I have a 07 gmc with the 5.3 liter engine. I have reciently been having idle problems and not running right, mostly when first starting and driving the vehicle. After 5 or so minutes it sems to run ok, but still doesn't idle when coming to a stop. I have replaced the spark plugs, washed and re-oiled the filter, and have the oil changed religously every 3000 miles. What next?
Saturday, September 22nd, 2012 AT 5:29 PM