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    2005 Yukon 5.3: why do I need the 1.25" core radiator

    Hi all. I have an 05 5.3 Yukon and my radiator has failed. In seeking a replacement, most that show up are 1" core. Is there a reason I shouldn't use a 1" core radiator? Is the 1.25" core necessary for the rear heat? Or is it for towing, which I don't typically do? I wouldn't mind going without...
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    Weird oil pressure problem 2005 Yukon 5.3

    2005 GMC Yukon AWD 5.3. Long story short. Oil pressure reads zero at startup but if you stab the throttle comes up to normal. Replaced sending unit same thing. Replaced the pickup tube and o-ring same thing. Manual pressure gauge indicates zero pressure until stabbing the throttle, at which...
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    Can i run my 2005 Yukon 5.3l with 8 quarts of oil in it

    Hi. Will it harm my 2005 5.3l Yukon to run with 8 quarts of oil in it. The shop just supposedly changed my pickup tube o-ring and either they didn't actually do it or they messed up the seal during installation. I am willing to bet the pump is losing prime. When the truck is turned off. I can't...
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    2005 Yukon 5.3 oil pressure issues. Please read, I need your help

    Hi. About 3 weeks ago I drove my Yukon to the Vets office. When I started it up, it read zero oil pressure. Stabbed the throttle and pressure went to normal. Thought the oil sending unit might be faulty and replaced with ACDelco part. Same issue occurred. After some research, I added 2 quarts of...

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