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  1. McDermut

    99 Yukon Radiator Replacement - Suggestions?

    Correct, no external cooler on the driver's side, only the cooler previously pictured on the passenger side. When I removed the hard lines of the radiator the passenger side was transmission and driver's side was oil, with each having about a cup or so of fluid coming from the lower connections.
  2. McDermut

    99 Yukon Radiator Replacement - Suggestions?

    Thank you very much!
  3. McDermut

    99 Yukon Radiator Replacement - Suggestions?

    RA is what I've been using to try and find the correct radiator, however between the two radiators that have four hard lines instead of two I haven't yet found one with matching RPO codes. Here's what RA has for OEM: And here are my complete RPO codes:
  4. McDermut

    Unknown rough idle and bottom

    Has anyone else tried this? Are there any potential issues in it?
  5. McDermut

    99 Yukon Radiator Replacement - Suggestions?

    This is looking into the grill on the passenger side, what exactly am I looking at here?
  6. McDermut

    99 Yukon Radiator Replacement - Suggestions?

    So my radiator has reached the point where it needs to be replaced. Age plus having well water run through it at one point (not me) has been causing cooling issues. I'm confident I can replace it myself, the hardest part I expect will be removing and reattaching the oil/trans lines connections...
  7. McDermut

    Thermostat Issues

    I have a 99 Yukon 5.7, what is the typical operating temp on the gauge for city driving or on the highway?
  8. McDermut

    Barn doors locked and won't open

    I just had the same exact same thing happen to my '99 Yukon's barn doors the other day. There's no resistance when you pull the handle up and the click you usually hear and feel is gone. Is there any more advice on fixing this issue? What I've read here is great I'm just bringing the thread back...
  9. McDermut

    99 Yukon AC Blower & HVAC Panel Not Working

    It did. I replaced the blower motor and blower motor resistor which has solved my HVAC problems. For my truck when you have the blower on max with both the AC and cabin circulation buttons pushed the flap behind the blower motor opens which makes the motor more audible. When you switch the...
  10. McDermut

    99 Yukon 5.7l V8 Fuel Filter Replacement

    You're correct, it was a 5/8" on the fuel line and if I recall correctly a 13/16 on the filter. Penetrating oil and rags were definitely necessary, and the way the filter is positioned makes for a tight workspace. Everyone's advice into account it went off without a problem, many thanks!
  11. McDermut

    Idiot Question Time - Trans Fluid Dipstick Level

    Okay so probably my most ridiculous and likely obvious question to-date, but I want to make sure before I go any further and potentially mess something up. I checked my automatic transmission fluid level and I'm not entirely sure if I need to add more or if I'm at capacity. I have yet to find a...
  12. McDermut

    99 Yukon 5.7l V8 Fuel Filter Replacement

    Thank you both very much! I wasn't aware the fittings were softer and required a flare wrench, looks like I'll be headed to the hardware store. Would y'all happen to remember what size flare wrench and open-end wrench were used on the filter? It's not so much for me as for anyone referencing...
  13. McDermut

    99 Yukon 5.7l V8 Fuel Filter Replacement

    I'm looking to replace my fuel filter, which is likely long overdue. I wanted to know if there's a specific process I should follow to depressurize the fuel line and avoid air in the line as much as possible. I've heard having the engine running and pulling the fuse is one way, but I want to...
  14. McDermut

    99 Yukon AC Blower & HVAC Panel Not Working

    Thanks for the advice! I'm still trying to figure out how water got that far in the first place.
  15. McDermut

    4WD Switch/Service 4WD Light Issue?

    I replaced my old OEM radio with another slightly newer OEM unit, which you have to take the dash panel off then unplug the headlight and 4WD switches to do so. After I plugged everything back in, hooked the battery back up, and started the truck my Service 4WD dash light came on and stayed on...
  16. McDermut

    Got-to and to-avoid parts brands/MFGs?

    I'm currently looking to order a few parts from RockAuto, and was wondering if there are any parts manufacturers I should stay clear of? On the flip side, what manufacturers are consistent and reliable in yall's experience? I've seen brands such as AC Delco, Standard Motor Products, Dayco, etc...
  17. McDermut

    99 Yukon AC Blower & HVAC Panel Not Working

    Thank you! I pulled the blower motor and it was completely shot. Somehow water got in and rusted the lower half of the interior motor mechanism. The rod was broken off from the motor and the plastic fan had broken off completely and even worn down some of the housing plastic. You can see in the...
  18. McDermut

    99 Yukon AC Blower & HVAC Panel Not Working

    Thank you very much! I've pulled the blower motor and it's most definitely dead. I appreciate the tip about vehicle info, I'm still trying to upload a pic of my RPO codes to my signature, but I've updated it to have at least basic info at the moment. I certainly understand how that can be helpful.
  19. McDermut

    99 Yukon AC Blower & HVAC Panel Not Working

    Hello all! So I've had this issue(or issues) for about a little under a year now, but it all finally completely went kaput a couple months ago. The issues I've had are: - The AC blower motor started making a type of very loud harsh grinding noise intermittently when the AC or heater was on. It...
  20. McDermut

    New Member from Texas

    Thank y'all! She has been pretty well maintained, but I've had to replace and work on a couple things mechanically since I got it, just from being used as a farm truck and age.
  21. McDermut

    New Member from Texas

    Indeed, however it's been a long time since it was used to push cattle, back when they were still living at the farm and grazing cows. BTW I didn't name it, that was my grandfather not too long after he bought it I believe. He had a rather whimsical side that came out frequently. It never...
  22. McDermut

    New Member from Texas

    Here she is!
  23. McDermut

    New Member from Texas

    Thank you all very much for the warm welcome! I had some internet issues so I've been focused on surviving a now all-online semester. I did finally have a chance to take some decent pics in good weather.
  24. McDermut

    New Member from Texas

    Hello All! I'm a new member to this forum from the Texas Panhandle. I've been driving for almost three years now, and am currently attending college. My first and current vehicle is a 1999 GMC Yukon SLT 4-Door Utility (4X4), with a stock 5700 V8 "Vortec" engine. It's got 134300 miles on it and...

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