Engine Mechanical problem
2004 GMC C2500 V8 Two Wheel Drive Automatic 135000 miles
last night when engine started it ran very rough, missing badly. Turned it off and restarted after a minute, it stopped missing and ran pretty smoothly, when started this morning it was missing badly again and has a rather loud knock/ clacking sound from what appears to be the drivers side in the lower part of the engine. I changed plugs and wires but there is still a miss and knock.
Tuesday, February 2nd, 2010 AT 4:09 PM