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  1. gpracer1

    Broken Intake Valve from Valve Float 6.2L L92?

    Yes, if it stays the same after adding oil it’s the valves or a hole in the piston, if it is higher then the rings.
  2. gpracer1

    Broken Intake Valve from Valve Float 6.2L L92?

    Time to do a compression test dry, record value. Squirt oil in spark plug hole and repeat, record value.
  3. gpracer1

    2010 Tahoe AC HELP!!

    Happy cool summer !!!
  4. gpracer1

    Need Help! My 07 Yukon XL is very very dead

    I just scored a genuine GM Tech 2 a few hours ago. Was scanning Craigslist and OfferUp for months, found one on OfferUp today, picked it up a few hours ago for $400 Tech 2, CANdi module, PCMCIA card with 32.007 Already loving it, hooked it up to the vette and Tahoe and went deep into most menus.
  5. gpracer1

    Ticking noise after replacing a/c belt

    Remove belt from cold engine, start engine and listen. This will eliminate the belt, pulleys and accessories. Dont run it for more than a minute or two. If you dont hear it anymore then one of them is the issue, while the belt is off spin each by hand and listen or feel. I just had a ticking...
  6. gpracer1

    Lets Get This Party Started

    Get a tune first. It should have come from the factory with a tune, it will drive and shift much better.
  7. gpracer1

    Vibration during deceleration

    U joints. Possible trans or motor mounts. Drive 70 and put it in neutral and see if it vibrates, if it does, u joints or driveshaft bent or out of balance.
  8. gpracer1

    2007 Denali Rough Idle and Stall After Running Long

    Im sure your fuel trims were all jacked up from constant pressure changes while driving. I would reset that / batt disconnect, then drive it and let it relearn.
  9. gpracer1

    Need Help! My 07 Yukon XL is very very dead

    Let us know, its one of the only tools I dont have yet.....been looking for a real one but they are expensive unicorn farts and none local.
  10. gpracer1

    How hot is your transmission with an aftermarket cooler?

    Constant temps of under 200 is fine, hitting 230 for short big uphill climbs while towing is also normal. Higher the ambient temps the higher the trans temps.
  11. gpracer1

    Overheating towing with Denali 6.2L - Losing my F'n mind!!

    Yes I completely understand this. Phoenix is only 1400 ft but at 60 psi the fuel should not be an issue since 60 psi is 60 psi. Boiling water is at atmospheric pressure which varies with altitude unless you have a pressure cooker.
  12. gpracer1

    Overheating towing with Denali 6.2L - Losing my F'n mind!!

    Where do you guys live that are wrapping your fuel lines? Just curious as I live in Phoenix and it was 111 the other day in rush hour for my 30 mile drive with the AC on high and I don’t have any fuel lines wrapped or vapor lock. There must be something else going on.
  13. gpracer1

    Overheating towing with Denali 6.2L - Losing my F'n mind!!

    I would think that a cracked block or blown head gasket would show one of several symptoms........water in oil, a cylinder misfire, low coolant level from combustion gases over pressurizing the cooling system, white smoke out the tail pipe, etc. But for overheating it will be due to low coolant...
  14. gpracer1

    Slotted and drilled rotors

    Same diameter just higher quality rotor for no warp. Pads have great friction coefficient and no fade (I drive it like my vette minus 120hp) and it stops on a dime. Police calipers have silicone instead of rubber seals for double the heat capacity before things melt and fail.
  15. gpracer1

    2007 Yukon Denali overheats and turns off AC...

    Im seeing two people here having the exact same problem? Is it "overheating" when driving slow in the city or at highway speeds? Is the fluid boiling out or any loss/overflow? Is it REALLY overheating or is it a sensor/electrical problem? Full coolant, new thermostat, fans working would all...
  16. gpracer1

    Slotted and drilled rotors

    I did the "loaded" Police calipers with police pads from Rockauto, slotted only R1 carbon geomet rotors from R1concepts.....had them cryo treated. Very happy with the results.
  17. gpracer1

    Overheating towing with Denali 6.2L - Losing my F'n mind!!

    As always you will have to be certain that you REALLY are running that hot. You may have to install an analog temp gauge (not electrical) to co-witness these supposed temps. I dont see why the truck would shut off unless it really is so hot that there is a vapor lock situation going on from...
  18. gpracer1

    AC Blows Hot not the belt

    Sweating accumulator only tells so much. In your neck of the woods the dew point may be 65 degrees because of the high humidity. At that point at least you know there is Freon in it and the compressor is doing something. Now take me in Phoenix today with 110 and dew point of 25 degrees at 5%...
  19. gpracer1

    Help with cylinder 5 misfire P0305 (sorry, long post... but stumped)

    In order f least to most expensive I would go plugs, wires and then lifters. Looks like you have almost covered everything.
  20. gpracer1

    2010 Tahoe AC HELP!!

    Holy smokes that is low. There must be a restriction before the port, if the valve in the port is opening. Is the port hot or cold to the touch?
  21. gpracer1

    2010 Tahoe AC HELP!!

    Any new news?
  22. gpracer1

    07 tahoe coolant temp issue

    If I remember in a few hours when I get home I will open my OEM tune file in EFI Live and see what it is.
  23. gpracer1

    Ac not cooling / Over Heating

    Dual fans should always come on together unless seperated by a baffle or something or you just suck in one and out the other.
  24. gpracer1

    2010 Tahoe AC HELP!!

    High side is 30-35??? I can only assume you mean 130-135 or you have a serious problem.
  25. gpracer1

    Cabin air problem-not blowing

    WHEN this happens is the blower on high or low? If you live in a humid area and use low blower you get close to freezing the moisture. Your system should cycle the low side to prevent this. It may be not cycling correctly or low on refrigerant causing partial then total freeze. Next time...

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