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  1. Merc1973

    Rusty Fuel Line and Filter

    What are the odds that i will be successful in removing and replacing my filter without destrying the lines? See picture. I've been soaking it in PB blaster a few nights in a row to prep.
  2. Merc1973

    New water pump and fan clutch? SOLVED

    At 309k miles I am ready for my 3rd water pump. The bearings are loud I thought it was my alternator so I change that, apparently those bearings were all so trashed so its not as loud, but i can tell by spinning water pump pulley by hand those bearings are also on their way out. Since the fan...
  3. Merc1973

    How do you guys like the 15-20's?

    I'm looking at a 2016 Suburban LS with 5.3, cloth, Max trailer package, smooth ride air shocks, 20" wheels with 61k miles. Dealer wants $39k. I test drove it today, first time in this model year. I've driven a rental 2008 Tahoe, and this is more powerful. Smooth with positive feeling shifts...
  4. Merc1973

    Body Mounts?

    I think My body mounts have seen better days. There's a small clunk where this on is located when going up my driveway at an angle and pulling out from my street little faster than normal. Double checked all control arm bolts and all control arms new this year. Im guess they're not supposed to...
  5. Merc1973

    Factory ride height?

    Does anybody know the factory Hub to fender height in the front on a 4x4 yukon SLT? How far is the lower control arm supposed to be from the bump stops?.
  6. Merc1973

    Trailer lights malfunctioning (((SOLVED)))

    Recently my trailer lights have been functioning. My Yukon has the factory trailer hitch and wiring . The trailer I recently rewired and installed new lights last summer. And it work Normal. I even tried to switch adapters without any change Now when I plug them in and use turn signal all...
  7. Merc1973

    Loose exterior door handle

    My driver's door handle is getting more loose with age. I fear one day is not going to open and finally break. Anyone have this too? Need to find the worn part inside the door.
  8. Merc1973

    Oil leak

    I have an oil leak in Yukon with 277,000 miles. I'm not sure if it's coming from the rear main seal or the rear part of the oil pan gasket or if there is a gasket at the oil filter adapter. The rear main seal was changed with a NAPA brand at about 245,000 miles when I put in a reman...
  9. Merc1973

    LT or P tires & Tire size Questions

    What the consensus on running LT tires vs P tires on our trucks? I occasionally tow but its just a DD most times. Also, will running larger diameter tires cause premature wear on the transmission? I'd like this truck to last as long as possible
  10. Merc1973

    Hub-centric rings?

    I have some free wheels i got. However they do not sit in the hub, only on the studs. Im looking to get some aluminum rings. What is the hub size for our trucks?
  11. Merc1973

    New towing mirrors from Amazon?

    My driver side mirror is just about unusable since the defrost fluid inside is leaking. Has anyone gotten those new towing mirrors where is built-in turn signal power mirror and defrost from Amazon? I'm looking at these YITAMOTOR Compatible for Chevy Towing Mirrors, Chevrolet Silverado Side...
  12. Merc1973

    Help. Speedometer reading crazy and erratic shifting???

    Truck: 03 Yukon 4x4, 266k miles, reman trans installed at 250k, fresh ATF fluid last summer (drain and refill only). Just started this morning on the way to work while stuck in traffic. It's not the step motors in the gauges, but the speedometer will move up and down erratically reading much...
  13. Merc1973

    Body Mount Bushings?

    Anyone replaced their body mounts? Mine look like they will just fall off, so much damn rust. $50 each for Dorman or Energy polyurethane kit for $200 looks like the only options.
  14. Merc1973

    List of GM wheels to fit the GMT-800?

    Is there a list of GMC/Chevy models and years for take-offs to directly fit our GMT-800 trucks?
  15. Merc1973

    New Front suspension/steering Questions

    At 260k my factory front end is shot. I have already replaced things that dont need alignment like pitman arm, idler arm and idler bracket, swaybar bushings and endlinks and shocks. I need to order the tie rod ends and upper/lower control arms. Im going with AC Delco Professional from rock...
  16. Merc1973

    Stock bottom end 4.8 out of high mileage Tahoe runs 7's in a fox body

    I found this on another fourm, thought I would share it here: At 3:40 of the video owner starts to talk about his setup (just before that you can see his run). 4.8 stock bottom end runs 7's at TX2K19 plus many more fast street cars.
  17. Merc1973

    A/C not working after new parts.

    Installed a new Denso AC condenser since it was visibly leaking, new NAPA orifice tube and line, new 4-seasons accumulator, new rubber seals soaked in PAG46 and replaced appropriate PAG46 oil in each part today. Sucked down to 30 psi for 45 minutes, held. Put in 3.5 cans of r134a idling at 1500...
  18. Merc1973

    Rust Repair Cost?

    I have to fix this rust, it looks awful... Not sure if its from the rear HVAC evaporator or just winter salt. About how much do you think it would cost to grind it out, weld in a patch and repaint this lower part of the rear quarter panel? Surprisingly this is the only rust on the body. The...
  19. Merc1973

    Stop roof liner separation?

    I want to stop the roof liner fabric from falling down. SO far it's only in this spot at the passenger side front at the windshield. I do not have a sunroof. I'm afraid to drive with windows open since it flaps from the wind. What's the easiest way to attack this?
  20. Merc1973

    Front end suspension/steering replacement?

    Well, Its time at 240k to replace the factory control arms/ball joints, sway bar bushing/links, tie rods, pitman arm, idler arms, idler arm bracket. Question is between the two premium lines: Moog Problem solver/HD or AC Delco Professional. Anyone who has replaced these parts have a...
  21. Merc1973

    New Rear Differential Cover Bolts?

    Im looking and can't seem to find new Diff cover bolts. I have a new diff cover and the old bolts look too crusty to save. Anyone have a link? Pictoral diagrams dont show them. Are they Metric or SAE? Will these ARP bolts work? https://www.summitracing.com/parts/ARP-437-3001/
  22. Merc1973

    Replcing intake gasket with questions

    (I can't change my title spelling error) I'm finally able to replace my bad intake gasket giving me a whistle sound, rough idle at times and Bank 1&2 running lean codes. I have the new: -Fel-pro gasket set MS9016T -AC Delco 15-11057 T-stat and water inlet assembly -Dorman knock sensor harness...
  23. Merc1973

    Replace rear HVAC ceiling temp sensor/aspirator?

    Have anyone replaced the rear one yet? Mine buzzes and I have No Heat in the rear at all, even on max temp. A/C works fine. I bought two of these sensors, one for front and rear. My front finally stopped buzzing and died totally and have no heat until i put HVAC control on max (in front)...
  24. Merc1973

    03 Yukon. No Start, just Click

    Happened at work today. Now getting towed home. Tried jumper cables, jumper pack, cleaning and tightening battery terminals, hitting starter and solenoid while some else turns key. Turn of key just gives ONE loud CLICK of the starter solenoid. So it must be the starter. It's original at...
  25. Merc1973

    2500 Front control arms on a 1500 Yukon?

    Anyone ever done this? Is it possible? I notice front control arms of the 2500 ans 3500 GMT-800 have different geometry, allowing for a taller suspension and sturdier design? Would these fit if one wanted to lift the front a little bit, maybe with keys. Would this keep the ball joints and a...

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