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  1. C

    Overheating

    So recently my truck has been overheating, i have replaced the water pump cause it started with a leak there, then replaced the radiator cap, now the thermastat , i have noticed it will overheat as i drive and cool down when im parked. any suggestions?
  2. C

    Getting some ponies out of the 5.7

    What kind of power gains can make actual difference to the feel of the motor. The 5.7 seems pretty sluggish. Just wondering if they really need overhaul like stroker kits or F/I to get some gains. Or can simple bolts on be helpful to see gains that will be noticeable . Possibly looking for 300 hp .
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    Temp Gauge Issues

    So lately I have been notecing that my Temp gauge on my 99 Denali was been jumping hot and cold at random points of driving. Would jump high then normal out of nowhere and just does it now and then. Checked my coolant and i am full there, and no smell of coolant leaks so im not sure if anyone...
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    New Headunit with Bose

    I have a 99 Denali with the Bose system, I was reading some threads that people throw in their new head unit and get no sound. My new head unit is A DD Pioneer AVH-P3300BT and want to make sure i get all the right stuff when i go to install. Do i have to rewire all speakers. Or do i have to...
  5. C

    Ignition issues

    So lately when I get in my car, i have issues turning my key to turn my car on. I have to wiggle back in forth till it finally turns over. What issue could be causing this ?
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    Oil Leak

    So i have read a few postings about this, i had a oil cooling line break that poured all my oil out, so then i took to dealer to have replaced. Im still getting the same oil leak on the denali. Could it be a bad cooler line fitting or a gasket . Also does anyone have a write up on how to remove...
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    Stereo Unlocked and is strange

    Hi everyone very new to the forums, but just purchased a 1999 Denali , and when i bought the stereo was locked, so i recently got it unlocked but to come to find is that my only vocals come from the very rear speakers and my fronts only put out bass but no vocals. what could this be? This is...
  8. C

    Rearend Feels loose & clunking noise in front

    So when im driving my and I make turns in my 99 Denali , my rear end feels like it slides . Im not sure what it can be maybe its a sway bar issue or something along those lines that its not stiffening the rear end. Also my front driver side makes a clunking noise when i slow down, or hit a...
  9. C

    99 Denali front end revamp

    Hey looking to get info if the newer denali 01/02 front clips can be modded to fit the 99 denali's? If not does anyone know where i can find some headlights for this truck, cant find anyone. Especially clear corners

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