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  1. L

    Coolant reservoir uneven

    Like the fill funnel area where you pour the coolant into the overflow tank is higher than the rest of the space in the tank.
  2. L

    Coolant reservoir uneven

    I did no leaks anymore after clamps were changed
  3. L

    Coolant reservoir uneven

    Yes I have rear air and it works and no I dont have a heater core leak. It happens to drop below the fill line every 2 weeks or so. I drive it every day.
  4. L

    Coolant reservoir uneven

    So I had my mechanic do a compression test and it held. My oil is clean and I did a combustion test and no exhaust fuel in the coolant system. I did a dye test and I did find the clamps at the end of the hoses to be not holding good so I replaced them. But I am still losing coolant and the...
  5. 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.
  6. L

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

    ****UPDATE**** it turned out to be a loose wire in the hardness for the blower motor causing a shortage.
  7. L

    [SOLVED] Help finding noise under the engine bay

    ****UPDATE*** The noise was coming the ac tensioner. If you have this problem check that first.
  8. L

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

    ***UPDATE**** it was the ac tensioner. If you have this problem check your ac tensioner because it’s probably that.
  9. L

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

    Yeah the sound source is from that areaSound <——
  10. L

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

    Update the sound sounds like it’s coming from the low front end of the motor a guy earlier said ac tensioner Sound <——
  11. L

    2004 Yukon XL whistle with belt off

    I have the same problem and i’ve looked under the engine and it sounds like it’s coming from the AC belt or pulley area. Did you ever figure it out?
  12. L

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

    Yes I does but only in that rpm range 1000-2000. But it doesn’t happen in weather above 45 degrees.
  13. 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...
  14. L

    [SOLVED] Help finding noise under the engine bay

    Not that. It happens mostly around 1200-1500 rpm
  15. L

    [SOLVED] Help finding noise under the engine bay

    I haven’t changed the idler pulley but it didn’t make that sound until it started to get cold.
  16. 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.
  17. L

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

    Just posted some pics
  18. L

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

    This is my Yukon
  19. L

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

    I had my ac recharged during the summer but the problem happened durning an overnight freeze.
  20. 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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