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  1. L

    Coolant reservoir uneven

    Have a problem with my 04 Yukon every time I fill in my coolant reservoir it feels uneven, despite having a new water pump, hoses, clamps, and I also lose coolant under load.
  2. L

    [SOLVED] HELP!! Weird flute like whistle coming from engine bay.

    I have a 2004 GMC Yukon with 267,000 miles on it and recently I had some work done to it during the summer. I recently changed the water pump, thermostat, upper radiator hose, all belts, pulleys, and tensioners, alternator, oil pan, gasket, crankshaft seals, and valve cover gasket. And I noticed...
  3. L

    [SOLVED] Help finding noise under the engine bay

    I need to help finding where this noise is coming from under the engine bay. Only happens when on the rpm’s. New alternator, belts, tensions,. Started happening when I got cold.Video of noise it’s a high pitched chirp.
  4. L

    [SOLVED] Front HVAC turning on and off when accelerating.

    I have a 2004 Yukon with the dual zone automatic climate control. Last winter I went out to start my truck one morning after an overnight freeze and the front HVAC control module was on from the previous day I had drove my truck. All the buttons and lights worked on the control module but no air...

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