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  1. McDermut

    Help with Correct/Recommended Fluid for Rear Differential Fluid (2023)

    Thank you both very much for the information and advice, it doesn't please me that I cannot do the job completely but I want to do what I can now, at least whatever crawling under my car in an apartment parking lot can accomplish. I found that Lucas offers an 80W-90 gear oil, but doesn't seem to...
  2. McDermut

    Help with Correct/Recommended Fluid for Rear Differential Fluid (2023)

    Good afternoon All, I'm hoping to do a "Quick and Dirty" gear oil change on my rear differential, which will involve using a pump run through the fill hole down into the differential to siphon out the old oil and then reverse the process with fresh oil. I'm well aware this is only doing half...
  3. McDermut

    '99 Yukon Rough Idle and Unknown Noise

    Thank you all for the advice and information so far. I wanted to make an update on the issue which I haven't been able to fix yet due to mostly college mayhem and a more pressing head gasket leak onto the block. I have also been gathering more information to try and narrow down the issue(s)...
  4. McDermut

    Instrument Cluster Missing some Bulbs - Issue?

    Okay great to know, thank y'all! An LED conversion is definitely in the works.
  5. McDermut

    Instrument Cluster Missing some Bulbs - Issue?

    So I removed the instrument cluster from my '99 Yukon during some cleaning and just checking to see what's what, and I noticed that some of the bulbs were missing. I've included pics of both the left and right sides where you can clearly see where the missing ones are. This is my first time...
  6. McDermut

    Unknown Window Streaking - How to Fix?

    I've had this streaking on my driver's window since I've been driving the car. It's not been a hazard, more like an annoyance as it doesn't obstruct my view that much. However I would like to see about getting rid of it and having a normal-looking window with no concerns of it becoming any more...
  7. McDermut

    '99 Yukon Rough Idle and Unknown Noise

    Haven't adjusted the valves or replaced the spider yet, or for that matter anything that requires removing valve covers or the intake manifold. I haven't noticed any vacuum leaks but I've not actively looked, where are they typically on the 5.7?
  8. McDermut

    '99 Yukon Rough Idle and Unknown Noise

    Good evening everyone! I'm having issues trying to diagnose a rough idle and unknown engine noise I've been experiencing. Over the past six months, I've replaced the spark plugs, plug wires, cap and rotor with correct AC Delco parts but the issues are still persisting. I've made an unlisted...
  9. McDermut

    High oil pressure?

    Whatever happened with your pressure issue? I might have a similar problem with my vehicle.
  10. McDermut

    CV Boot Ripped - What Now?

    Quick question, are there different axle shaft lengths that I should check before ordering? I checked the axle that's currently on my vehicle and from each metal band securing the interior side of each boot to the other the metal shaft is about 4 inches as best as I could measure. Just...
  11. McDermut

    Dashboard and Component lighting failure

    I'm not sure, I don't have any accessories or such installed, and the bulbs are stock halogens that I haven't ever messed with. The fuse may have just been old.
  12. McDermut

    Dashboard and Component lighting failure

    I checked the fuses and #9 was fine, but #14 was blown, which according to the chart is for illumination. How I missed that the first time I'm not sure, but I replaced it and all the dash and control backlighting is working now. I think the headlight switch might also be causing problems, so...
  13. McDermut

    CV Boot Ripped - What Now?

    I checked them out, currently out of stock of the one I need unfortunately. Besides Rock Auto, any other places with reliable remanned or new axles?
  14. McDermut

    CV Boot Ripped - What Now?

    Thank you very much! I'll be ordering one in short time.
  15. McDermut

    CV Boot Ripped - What Now?

    It does, and after reading through the comments and doing some research I'll just pay to replace the CV axle. Since I'm away from home and the necessary tools the cost of labor to just replace the boot instead of the entire thing definitely isn't cost-effective.
  16. McDermut

    CV Boot Ripped - What Now?

    It's just shy of 138,000 and as far as I know both CV axles are original to the vehicle.
  17. McDermut

    Dashboard and Component lighting failure

    I'll check there, thank you.
  18. McDermut

    Oil change time - Additives?

    I opted for no additives, just the oil and an AC Delco PF52. I ran just the smallest amount of Marvel Mystery Oil that was leftover from a second gas treatment prior to making a trip home and it may have helped or not, but the old oil was pretty close to black when it came out.
  19. McDermut

    CV Boot Ripped - What Now?

    One phrase that seems to be my vehicle's motto is "If it's not one thing, it's something else" haha. I was doing an oil and filter change and while under the car I noticed the spattered grease along the inside of the wheel well, and then more accumulated on the metal parts under the CV axle...
  20. McDermut

    Dashboard and Component lighting failure

    Recently I've been having issues with the gauge cluster lights, as well as the radio and HVAC backlighting. The pictures below are what my current situation looks like. My radio's clock, as well as gear selector, Hi-beams, turn signals, E-Brake, and other indicators will light up, but all the...
  21. McDermut

    Oil change time - Additives?

    I'll be doing an oil change on my '99 Yukon, which I plan on using Mobil 1 full synthetic 10W-30 (which from what I've found on here seems to be a good choice) with either a Mobil 1 or an AC Delco filter. What I'm curious about is are there some oil additives that would help the 5.7L with the...
  22. McDermut

    What Motor Oil is everybody using?????

    I did realize that, and I'll probably make a new one I just wanted to give this thread a refresh. I've heard that as well, and it's not been very long since my last oil change but I think its time. I'll probably just stick with AC Delco, its been working for me so far.
  23. McDermut

    What did you do to your OBS GMT400 Tahoe/Yukon Today?

    Great instructions! Another on the "to do" list!
  24. McDermut

    What did you do to your OBS GMT400 Tahoe/Yukon Today?

    Nice upgrade! I'll probably do that myself but until then I just really need to flush my brakes. What size tubing did you use, and would a different size have worked better or not?
  25. McDermut

    What Motor Oil is everybody using?????

    Is there any disadvantage/harm in using a plain AC Delco filter designated for my car? Or are there better options to go with if I run Mobil 1 full synthetic 10W30? And should I bother with an oil additive? If so, which and why?

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