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  1. Jedig33k

    2007 Denali Rough Idle and Stall After Running Long

    Nothing like that, but they should be able to test you CAT for free at a muffler shop. I had similar codes, but my stalls were when hauling a trailer in hot weather. Also, besides adding oil, have you changed the oil plus all the other fluids that need to be changed due to mileage?
  2. Jedig33k

    2007 GMC Denali stalls after towing

    Probably my last question for you. I assume your rigs had OEM Tranny Coolers, did you find these not sufficient, so you fully replaced them with new ones?
  3. Jedig33k

    2007 GMC Denali stalls after towing

    Can I ask your vehicle model and year? Also, what temps were you seeing? I typically flip my computer over to watch my tanny heat and have not really seen it go above normal. The stock tranny cooler seems to be working fine, but you upgraded yours ans saw better results?
  4. Jedig33k

    2007 GMC Denali stalls after towing

    Why would the heat of the Transmission shut down the Engine? Please tell me your situation and how it worked?
  5. Jedig33k

    2007 GMC Denali stalls after towing

    So, my thinking goes along the lines of this. Basically, bad oil causes engine heat, engine heat will be seen by the sensors (Typically) Now for a story. Pulling the summit one hot summer day my 07 Yukon XL started all the bells and whistles and told me to pull over as she was shutting down ...
  6. Jedig33k

    2007 GMC Denali stalls after towing

    Any updates on this? Did everyone's issue get fixed by wrapping the fuel lines? My Theory is oil. I ran my trailer up and down the mountain most of the Spring with no issue, but I started having this same issue around mid summer (About 2 tows in). I thought Fuel, most though CATs, and after a...

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