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  1. R

    Random misfire

    Just a quick question looking for the most common reason for this. What causes a random misfire on a 6.0 engine. I’ve had this for 3 years and it’s always throw a random misfire code but never a certain cylinder. Hasn’t done it now in over a month. Just curious as to why. Thanks Rod
  2. R

    2003 GMC Yukon traction control/limp mode

    I have had this 2003 Yukon for 2 years now. This has been an issue from the day I bought it. I can be driving along and the traction control light will come on and I go into limp mode. It can be at 55 mph or 15 mph. Sometimes it will go weeks without this happening and other times it may happen...
  3. R

    2003 6.0 throttle body question

    I have a 2003 Yukon Denali with a 6.0. There I a plug for the wiring harness that pushes in the front corner of the throttle body. About every 100 miles or so while driving my traction control light will come on and I loss all power. The vehicle goes into creep mode. I will pull over, shut off...
  4. R

    Elecrical problem 2003 6.0 Yukon

    My 2003 has an issue with some type of short. The brake light in the dash cluster is staying on (very dimmly) all the time which includes with key off and all doors closed. It just started doing this 3 days ago. I also am losing my gear selection and mileage reading in the cluster along with my...
  5. R

    Smoke testing Procedure help needed

    I have a 2003 Yukon with a 6.0. I bought it in May with 249k miles on it. It runs great but has had the CEL on since i got it. Ive checked and cleared the codes many times during the summer but I needed it everyday to tow my mowers so I didnt have time to get to involved. Now I am done mowing...

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