Engine Performance problem
2003 GMC Yukon V8 All Wheel Drive Automatic 68000 miles
I have a 03 Yukon Denali XL and just had my spark plug changed. Everything seems to be running good but I am just wondering. Do you set the gap of the spark plugs to your car specifics or the gap that is set on the new plugs. How Would I know if the plugs were installed correctly and what is the gap size on a 03 XL DENALI?
Friday, May 23rd, 2008 AT 7:34 PM