Recent content by mhaywoodcz

  1. mhaywoodcz

    Help Troubleshooting Fuel Trims

    I would say it can't hurt. I also had the MAF or MAP codes,(can't remember). Fuel pump would at least eliminate that issue
  2. mhaywoodcz

    Help Troubleshooting Fuel Trims

    I ran into a similar issue years back. Not the same but had high fuel trim issues. My long term trims were high after a 2+ hour road trip. After the MAF and MAP sensor replacement without changes, I found it to be a fuel pump issue. The previous owner had had the pump replaced but they didn't...
  3. mhaywoodcz

    2002 Yukon Denali making noise when decelerating

    Pads or possible U joint, front and rear always turn so I would check them also
  4. mhaywoodcz

    2002 denali front diff failure/vibration

    Update, the other shop rebalanced the drive shafts, they ended up removing weights and adding some others. Seems the first shop didn't do a good job. Either way it's a whole lot better. When I did the big brake upgrade (2023 pads/rotors) I got a newer set of wheels. The tires are new but are...
  5. mhaywoodcz

    2002 denali front diff failure/vibration

    Update, I checked all the mounting points and everything is good. Replaced the front diff, driving wise its smoother but I still have the vibration. Ive pulled the front and rear drive shafts, going to take them to a different shop tomorrow (drive line specific). I believe the last place I had...
  6. mhaywoodcz

    2002 denali front diff failure/vibration

    thanks for all the replies guys, the fluid is definitely glittery, so I ordered a reman diff from powertrain products. With 170k on the original, it's possible it's at its end. I know when I first got the Yukon it had 150k on it, diff fluid was brown glittery, so I figure it hadn't ever been...
  7. mhaywoodcz

    2002 denali front diff failure/vibration

    Forgot to add, the vibration is while rolling, neutral, or in any gear at the higher speed. It kinda drones also, kinda humm, humm, humm. Hope this helps someone decipher this and anyone else in the future
  8. mhaywoodcz

    2002 denali front diff failure/vibration

    GM Gurus, I have recently been working to solve a vibration in my 2002 Yukon Denali. Heads up this has been a fun 1. SO, 6 months or so ago I replaced the transmission with a reman from Performabuilt with a FTP torque convertor 2000stall. (just adding this to the history, you will see why soon.)...
  9. mhaywoodcz

    2005 Denali XL AWD - How does AWD work?

    Mine is a 2002 Denali with the G80. It's AWD but has the NP149 transfer case vs the newer Bosch. Don't know it has the works the same with the silicone coupler vs discs like the Bosch as far as power delivery
  10. mhaywoodcz

    2002 fuel trims loss of power after 2 hours

    Today I completed the E-fan upgrade Got the harness from ScottyBoy. Works great! went down the road and watched fuel trims, they seem to be around 0 or -1. So Im assuming that my fueling issue may be good now. Going to drive it around for a while and see. Thanks everyone for the input
  11. mhaywoodcz

    2002 fuel trims loss of power after 2 hours

    Thanks for the suggestions guys, I replace the pump yesterday. Found that who ever did the wiring last time only twisted the wires together and heat shrinker them, no solder or crimps or anything. Anyways I redid the connections with crimps and heat shrink and put it all back together. The new...
  12. mhaywoodcz

    2002 fuel trims loss of power after 2 hours

    So I sent the logs and pics to Black Bear, they believe it could be a failing fuel pump. Seems to only act up when it's hot/ few hours driving. So this weekend its fuel pump and vac line check time. Ill keep everyone posted on it
  13. mhaywoodcz

    2002 fuel trims loss of power after 2 hours

    Interesting, just weird that there are no DTCs showing up. I'll dig in and see how the vac lines and check the intake manifold, it does look a little oily on the passenger side. Thanks
  14. mhaywoodcz

    2002 fuel trims loss of power after 2 hours

    Hey Guys, Need a lil troubleshooting help. I have a stock 2002 Yukon Denali with 170k miles that starts acting stupid only during long road trips. We use this primarily for pulling the boat or camper to the beach our mountains. Usually after a good 2 hours of driving, I get issues with power...
  15. mhaywoodcz

    2002 Tahoe front end whine

    Hey Guys, not trying to thread hijack but I have a 2002 Denali, similar whine from the front end. Suspect the front diff, it had wonderful glitterness in the fluid when I changed it (new to me). If I read this correctly, can I find a 4x4 with the same gear ratio front diff and add my AWD portion...
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