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  1. gpracer1

    AC Accumulator Leak

    Must be pretty humid where you live. Run the AC on low blower down the highway, pull over and look, it will probably be white and frozen, then start to thaw and drip.
  2. gpracer1

    Torque app. O2 sensor data - can someone decipher?

    So are you asking for info about O2 sensors or is there an issue with your vehicle? I used this same live graph to finally pinpoint rough idle, high idle hangs on decel and lean codes on my C5 vette by watching these O2s going up and down at idle then spraying some propane from a torch (not lit)...
  3. gpracer1

    2012 Yukon XLT with mystery rough idle and misfire codes

    Have someone else do a leakdown on #3 or do it yourself, find out where it is leaking out and if it really is. In the mean time maybe swap the coil with one from the other side of the engine just to eliminate that.
  4. gpracer1

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    Got rear ended a few months ago....had the 8"drop hitch in. Not a scratch on the truck but bent the hitch and receiver hole was sloppy. Got a new hitch, ball and Factory brand new receiver. Glad I had that hitch in to take one for the team!!!
  5. gpracer1

    Inverter ?

    Dont forget there are 2 types.....modified sine wave and pure sine wave....PSW being better and more expensive.
  6. gpracer1

    Cooled Seats Quit....Need Wiring Diagrams

    With a coupon code got 3 years for $30 Hard to find the electrical schematics though.
  7. gpracer1

    Best octane fuel for fuel eceonomy? (5.3L only)

    What is responsible for better fuel mileage at the same * light throttle opening during cruise* ??........TIMING The more timing without knock/detonation the more torque the better the mileage. What allows more timing without KR? (Knock retard) Cooler intake air.... IAT , allows more...
  8. gpracer1

    Cooled Seats Quit....Need Wiring Diagrams

    Must be 2011-12 and up are different, the module is under the Driver seat. I had already pulled both seats and checked the connectors. Funny thing is I remember a slight burning smell when I got out of the truck that day when it went out, I was running errands and made many stops in 115 degree...
  9. gpracer1

    Cooled Seats Quit....Need Wiring Diagrams

    I really want the factory service manuals until I looked at the price of $500 holy crap.
  10. gpracer1

    Cooled Seats Quit....Need Wiring Diagrams

    Anyone have the wiring diagrams for the cooled seats on a 2013 Tahoe LTZ? Probably from the battery through the door to the seats. Tech 2 didnt help much. Push cool button it lights up, blowers blow but not cool as if the power to the Peltier plate is not getting there to convert. Ordered a CD...
  11. gpracer1

    Rear climate control tricks?

    As far as I know you cant control the back separately (with the front controls).....what you do in the front is what you get in the rear. I just looked this up the other day because I wanted to lower or raise the blower in the rear but keep the front where it was at, according to the manual you...
  12. gpracer1

    07-14 No Cabin Air Filter - is this correct?

    I did the carbon filter about 1.5 years ago. According to my velometer I lost about 20% air flow, no big deal since they blow so hard anyhow. Last month I could tell it was starting to blow less. Pulled it and it was quite clogged with AZ dust and debris. Dirty filter vs clean was 30% airflow...
  13. gpracer1

    2010 Tahoe ac help

    As long as there is even a little liquid R134a in the system, it will read about 75-90 NOT running the AC on both low and high sides (depending on ambient). As soon as the compressor engages the low side will drop, the colder the inside of the vehicle gets the more it will drop, also RPMs will...
  14. gpracer1

    2010 Tahoe ac help

    I hate to say "you need a Tech II" but it really helps with AC permissions and what may be inhibiting or commanding your AC clutch to engage or not......that is assuming the wiring, connectors, clutch is good. You can even read the pressure on it and command things on and off manually...
  15. gpracer1

    Shutters @ 40MPH, 1000RPM

    Drive it at 60 mph, put it in neutral, see if you feel it right away.....if not then down to 40 mph (i know you wont be at 1k rpms) but just to see if its driveshaft/ujoint related.
  16. gpracer1

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    high beams HIKARI Ultra LED Headlight Bulbs Conversion Kit -HB3/9005, Prime LED 12000lm 6K Cool White https://www.amazon.com/dp/B077B7GJ5J/ref=cm_sw_r_cp_tai_mtm0DbYBC7WYW Low beams Just my own personal research and educated guess. I go to work at 4am and work 12 hour shifts so same here...
  17. gpracer1

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    high beams HIKARI Ultra LED Headlight Bulbs Conversion Kit -HB3/9005, Prime LED 12000lm 6K Cool White https://www.amazon.com/dp/B077B7GJ5J/ref=cm_sw_r_cp_tai_mtm0DbYBC7WYW Low beams HIKARI Ultra LED Headlight Bulbs Conversion Kit -H11(H8,H9), Prime LED 12000lm 6K Cool White...
  18. gpracer1

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    low beams are normal looking, high beams will blind your ass. Hikari brand.
  19. gpracer1

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    Installed LED high beams to match the LED lows that I already had in. Stupid amount of light on high.
  20. gpracer1

    Brakes squeal when coming to a stop

    When you install new pads, spray a coat of disc brake quiet on the back of the pad....dont go nuts but a good coat. Let it dry ( it will be super sticky) , use brake clean and paper towel to remove any on the edges, grease the edges where it contacts the calipers and install. Most brake noise...
  21. gpracer1

    WOOT.com Range AFM disabler $119 today

    Just in case anyone is looking for one.
  22. gpracer1

    MPG towing and not towing (if not in right section please move )

    IR temp gun, the cats should be hotter than the rest of the exhaust system if working.
  23. gpracer1

    P0171 code and stalles at stop

    Try running the known good gas you have now until it gets low, if it does it again fill it all the way up (record number of gallons) and see if it is fixed again. It may be a fuel level problem, or reported fuel level like it says you have a 1/4 tank but its really emtpy-ish and you are...
  24. gpracer1

    07 5.3 Knock Sensor Issue

    Almost sounds like fuel pump low pressure or fuel starvation/filter, runs lean under acceleration then you get knock and it goes to limp.
  25. gpracer1

    Major FLAW discovery with Electronic throttle control with MAP sensor equipped engines

    I have to call BS on this. The MAP sensor is for sensing load, to adjust timing, shift points, injector pulse width, etc in harmony with other sensors like throttle position, O2 sensors and many others. It does not "command full throttle" if it fails. It is like you are stating a fact.

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