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  1. S

    2004 Denali severe duty fan clutch

    I'm in need to replace my fan clutch and also need the most cooling possible for my use case (Severe use in the Andes, long 1st gear climbs in high altitude). Can somebody help me with part numbers for severe duty clutches? Any make is ok. thanks folks!
  2. S

    TruCool 40k installation

    I'm driving a 2004 Yukon XL Denali in South America through the Andes. The cooling system is overloaded, so first step is swapping the tiny original for a big ATF cooler. Question: Keep ATF\water heat exchanger or connect the new cooler directly to the transmission lines?
  3. S

    2004 Yukon XL Denali 6.0 AWD Gearbox

    Hi all! Can somebody tell me FOR SURE which transmission is in my truck? It's a 6.0 Denali AWD. Does it have a 4l60, 65 or 70?

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