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  1. D

    In desperate need of help

    yessterday my truck ran out of power so I went a bought a battery, a alternator and a serpentine belt. I cannot get alternator to charge the battery. All of my connections are decent I ran a multimeter test from negative side post to the positive bolt on alternator and got 12.5 v and I ran a...
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    Spider injectors

    looking for steps on how to determine if the regulator or the fuel pump is bad? I’m getting fuel to the fuel rail and every time 59psi it fires up but stalls after about 3 secs everytime. I replaced fuel pump and filter. I’m feeling like it’s the regulator because prior before this I was getting...
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    Good info wanted

    I have a 5.7 vortec L31 in my yukon. looking to rebuild the whole bottom end. What would be the best overhaul kit to purchase? what are things that are a absolute need to replace. Im getting all of my overhaul rebuilding instructions from haynes overhaul manuals, youtube and general knowledge...
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    Is it possible

    Is there anyway to check for compression while engine is out of vehicle. I have a 1998 Yukon 5.7 vortec L31. And looking to purchase a used engine because I’m running low on money.
  5. D

    After Installation

    I have a 98 Yukon with 5.7L L31 I’m planning to replace the engine out with another used 5.7l. I have a few questions that need to be answered before I get started. I’m good on removing and installing but after installation will there be any electronic procedures like a tune or would I need my...
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    What are thes high performance parts?

    I stole this pic from ig. Does anyone knows what’s going on here it’s the first time I’ve seen an L31 like such. Is that cold air intake idk? I want to know?
  7. D

    Head Replacement

    I have a 1998 GMC Yukon with 230000 miles. It’s running a cylinder 4 Misfire. Me and my buddy at work looked inside cylinder 4 spark hole and seen a tiny spot of rust on the right side valve so we’re thinking it’s a stuck because the other side was pretty wet. I’m pretty low on money so I’m...
  8. D

    Help!

    I have a 1998 Yukon. My problem is the passenger side brake light doesn’t work and a rapid blinker when turning right. I have new bulbs a new circuit board and I made a new clean ground in the rear under the gas entry. I tested both connectors with a test light on both sides in the rear and the...
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    Electrical issue

    m having a electrical issue. When I pull my truck out of park my hatch unlocks When I turn the dome overide switch on for my lights. The gauge lights up my both turn signals and highbeam lights are on and solid. When I’m driving I see the temperature on my rear view mirror turning off and on ...
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    NEED HELP

    I’m having a electrical issue. When I pull my truck out of park my hatch unlocks When I turn the dome overide switch on for my lights. The gauge lights up my both turn signals and highbeam lights are on and solid. When I’m driving I see the temperature on my rear view mirror turning off and on...

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