I have a 1998 gmc sierra 4x4 with a 5.7l auto. And 214000 km. Truck drives fine except a rough idle, starts fine, dr estate good but sitting at a set of lights you can feel it run smooth and then slowly get rougher and rougher until it feels like it's going to stall out but will not. Spark plugs and wires under a year old with distributor and ignition coil. Possible vacuum leak or wires arcing?
have the same problem?
Wednesday, September 7th, 2011 AT 4:18 AM