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  1. #1

    Default 2003 Yukon XL AC compressor question

    I have noticed that my AC compressor seems to cycle off and on a lot. I understand why it would do it if I had the auto climate control on. But, it does it when I have all the climate controls in the off position or when I have it on full heat. Does anyone else notice this with theirs? Any ideas why this does it? How to fix it? Seems like I could be losing MPG and wearing the compressor. Thanks
    Last edited by Pikey; 01-04-2012 at 05:41 PM.

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors,
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

  2. #2


    I pulled the relay today and put a known good relay in. The compressor turns on almost immediately when I turn on the heater control. It has been nice so I have been driving with the windows open and the unit off. My MPG has increased by more than 1 mile per gallon. any ideas?

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