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  1. Mechanic421

    Denali Issues

    Ford is not any better!
  2. Mechanic421

    Transmission 3rd and 4th gear fall out

    You my want to check out sonnax web site. They have a 4l60 heavy duty truck build. I just built my self but have not installed yet ,hope it works. But any way sonnax said beast is not the way to go. Check out their smart shell. Not trying to step on any toes! So hope no one is offended that I am...
  3. Mechanic421

    Urgent- Please help identify part

    Not a problem it will be fun to bolt up with transmission fully installed I do that part with transmission hanging.
  4. Mechanic421

    Urgent- Please help identify part

    Metal bracket should be bolted to top transmission stud.
  5. Mechanic421

    H D sonnax truck 4L65E

    Has anybody here built or had built the heavy duty truck 4l65e transmission on sonnax website. If so your thoughts. I have ordered all my parts for the build . It will be my first transmission but I will have help from a experienced builder!
  6. Mechanic421

    Long term fuel trim issue no codes

    May have a small fuel leak in one of the fuel lines inside the intake manifold.
  7. Mechanic421

    Not sure is AWD is working

    My truck has no service lites on and rarely spins any tires but when it does I never notice traction control brake or it’s way late. Side note I live in Florida no snow and never had it in snow!
  8. Mechanic421

    Not sure is AWD is working

    All wheel drive is not four wheel drive. I have a 06 denali xl same system. Computer should apply brakes but system sucks! Try turning off traction control and lots of gas!
  9. Mechanic421

    Let's see your keys

    Don’t want to talk about it!
  10. Mechanic421

    Jet throttle body or Hypertech max energy?

    Same air box on the 6.6 duramax!
  11. Mechanic421

    AWD VS 4WD

    Awd has a open differential in the transfer case. 4wd locks front and rear together and gear reduce aka low . Awd should use braking system to help with traction.
  12. Mechanic421

    Rear Differential outer pinion bearing

    Remove locking pin then axles. Remove diff but do not mix up diff shims. Drive pinion out with nut on end of pinion. Drive outer race out then drive new race in ,place outer bearing in housing,seal then replace crush sleeve and pinion nut. Set pinion preload and torque cap bolts.
  13. Mechanic421

    Ac compressor help

    Put a/c gauge on the truck and scan a/c for codes.
  14. Mechanic421

    Steering wheel buttons not lighting up

    They all can't be bad even being dorman you need a wiring diagram. Sometimes you can find them online.
  15. Mechanic421

    Steering wheel buttons not lighting up

    Dorman is very hit and miss probably bad part if the other buttons are lighting up.
  16. Mechanic421

    2015 Denali Radio will not stay OFF!

    Have truck scanned for codes.
  17. Mechanic421

    GMT 800 Towing Package?

    I have 05 Denali xl also and I pull a 7 by 16 trailer . But wish I had 2500 .You probably haven't pulled your boat up some mountain yet? 4l65e has too small of a converter!
  18. Mechanic421

    GMT 800 Towing Package?

    A Half ton is not going to like 6000 pounds just saying.
  19. Mechanic421

    Just bought our first Denali

    Good luck ,I love my 05 Denali.
  20. Mechanic421

    New to this gas suv thing!

    Fabtech lifts! I have installed many lifts and they are the best.
  21. Mechanic421

    Am I making a mistake? Single vs. dual speed transfer case

    You will need low range for deep sand . I live in Florida we have lots of deep sand! Usually low gear is needed. I have a 05 Denali xl and you won't catch me near deep sand , kind of wish I had low maybe in to future.
  22. Mechanic421

    2005 Denali Yukon won't take fuel- NOT THE EVAP SOLENOID

    A good scanner can functions test vent valve and purge solenoid. Smoke machine would help . But not always accessible. Basically there is a restriction somewhere in the vent system.
  23. Mechanic421

    How to disconnect and remove rear AC

    They make caps to close off rear lines. But why! I live in Florida,love my rear a/c I point rear vent at my neck!
  24. Mechanic421

    Broken axle

    Ball joints broke!
  25. Mechanic421

    Fuel issue here looking for help

    Fuel pressure tester they will not start till some were like 55psi. But will run on less pressure.

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