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  1. NT1078

    Air ride compressor runs, no inflation?

    Hi all, This literally just occurred. Came outside to find my Envoy XL, 5.3 on the rear bump stops. Normally the rear air ride has been functioning great. When I stsrt it, the compressor runs but bags do not inflate. I have tried standing on the bumper to coax it, but no luck. Any suggestions...
  2. NT1078

    AC Compressor clutch?

    Hi all, I think the clutch on my AC compressor has gone. It was slowly rotating, producing some cold air, then would blow the #30 fuse under the hood. Each time I replaced the fuse, it would blow. Thinking the clutch is gone. Has anyone had success in replacing the clutch only? Recommended...
  3. NT1078

    TBSS Wheels are on!

    Whoo, GMC caps came in today through EBay. For those looking it turns out GMC Acadia caps do the trick
  4. NT1078

    TBSS Wheels are on!

    Thanks! They're 255/55. I might need to drop the rear air bags slightly when I tow our trailer, but that's a little ways off so far. Threw the speedo off by about 3km but I am ok with it. Cheers! Adam
  5. NT1078

    TBSS Wheels are on!

    Zoowee mama what a difference appearance wise they make! Now I just need to find some GMC center caps.
  6. NT1078

    How to release air from rear air bags?

    The OD of the TBSS wheel measures 2" greater which I calculated will affect hitch height by 1". The hitch was a little high before so I am thinking another 1" will do it. Note: The hitch cant be adjusted in height, it's a weight distribution hitch already set to lowest position. Cheers!
  7. NT1078

    How to release air from rear air bags?

    Hi all, 2003 Envoy 5.3 XL here. I would like to drop my rear air suspension by 2". I read it's easy to do by pulling the fuse so it learns the new height, however you need to release the air first. Anyone with experience with this? I do not wish to replace the air, it works perfectly (at the...
  8. NT1078

    TBSS Wheels on my Envoy

    The rims have 255/55R/20 tires. Will they fit my stock Envoy XL ok?
  9. NT1078

    TBSS Wheels on my Envoy

    Would anyone know of a source for GMC center caps for these wheels?
  10. NT1078

    TBSS Wheels on my Envoy

    Hi, This might have been asked many times but I failed to see anything in Search. In the spring I will need new tires for my 2003 Envoy XL with 5.3. I have found a good price for TBSS wheels. Will I have any issues? Rubbing? Speedo? My vehicle sits at factory height with functional air...
  11. NT1078

    Doors the same?

    Hi all. Do 5 and 7 passenger Envoys have the same front and passenger doors? Thanks, Adam
  12. NT1078

    Periodic rough idle, codes within thread. Plz help!

    Might have it solved! Replaced the other o2 sensor and put in a new fuel filter, and had the oil pressure switch replaced (unrelated but nice to have the gauge working) Over the past few days it has been running well, fingers crossed!
  13. NT1078

    Periodic rough idle, codes within thread. Plz help!

    These are great videos, thanks very much. I am leaning towards intake gaskets as my problems do seem more prevalent when the engine is cold. My drive to work is very short so it doesn't get much chance during the week to heat up properly, unless there is a long lineup at the Drive Thru, lol...
  14. NT1078

    Periodic rough idle, codes within thread. Plz help!

    So here is an update: Bank 1 sensor 1 has been replaced and I am no longer getting the P1133. What I am getting now us PO300 and a PO174. It still occasionally acts up, but it comes and goes, strange. I gave it a Seafoam can in the tank and have been running higher octane gas. I also changed the...
  15. NT1078

    Periodic rough idle, codes within thread. Plz help!

    Yesterday afternoon I got as far as putting it on ramps and sliding my big butt under for a look. I am thinking of changing the bank 1 sensor 1 o2 as I threw P1133 a few times. I got as far as getting a wrench on which slipped off, then I noticed the wire disappears beyond the bell housing. I...
  16. NT1078

    Periodic rough idle, codes within thread. Plz help!

    No kidding. It was nice that I didn't get charged for that part, holy. The base of the plugs were all very black and sooty, they certainly needed to be changed regardless. Interesting you suggested the battery, as I just came in from doing that. I disconnected it for at least 20mins and drove...
  17. NT1078

    Periodic rough idle, codes within thread. Plz help!

    So, here is an update of sorts. Have now changed all plugs and wires, gave it a Seafoam treatment and it was at tge garage today. It was still misfiring and carrying on. He changed the MAF at a cost of $270. Took it for a drive, all was good. Then it started again, so he put in my old MAF so I...
  18. NT1078

    Waterpump leak? Video within

    Oh, lemme go in and fix that up.
  19. NT1078

    Waterpump leak? Video within

    You're thinking it may be the gasket only causing the leak? Yes, it has the 5.3l
  20. NT1078

    Waterpump leak? Video within

    Hi all, I believe this is a sign my waterpump is on the way out. Please review to confirm my suspicions. Thanks, Adam
  21. NT1078

    Periodic rough idle, codes within thread. Plz help!

    Ok, here are some links to videos of data I have collected from the scanner. I am hoping someone can decipher it.
  22. NT1078

    Periodic rough idle, codes within thread. Plz help!

    These are great suggestions, thank you all. I have in my posession right now a good Snap On scanner that I borrowed from work over the weekend, trouble is I don't know how to decipher the data. I will post some photos and videos of some scans, perhaps you fine folk could decipher it?
  23. NT1078

    Periodic rough idle, codes within thread. Plz help!

    Thanks, are you suggesting it could be the broken valve seat I read about? Wouldn't that make it a constant misfire? This one comes and goes.
  24. NT1078

    Periodic rough idle, codes within thread. Plz help!

    Thanks for the info. Here is what I did today: Traded coil pack #1 and #3 and still saw a cylinder 1 misfire. Replaced #1 spark plug snd the #1 ignition wire and still suffering a #1 misfire. Whatever is going on is causing black smoke from the tail pipe and the smell of unburned fuel. The...
  25. NT1078

    Periodic rough idle, codes within thread. Plz help!

    I think I see something, a #1 misfire. Is the #1 driver's side, closest to front of motor?
  26. NT1078

    Periodic rough idle, codes within thread. Plz help!

    So my latest development is I have noticed the smell when its idling poorly of unburnt fuel. It is pretty strong. We have a good Scan Tool at work I am hoping to hook on and see what it comes up with.
  27. NT1078

    Periodic rough idle, codes within thread. Plz help!

    To clarify mine is indeed the 5.3l V8 model
  28. NT1078

    Periodic rough idle, codes within thread. Plz help!

    Thanks so much for the advise, I will start with that and go from there. Today it seems to be behaving itself, so it is very random, but seems more so when the vehicle is properly warmed up. I have access to a 3/8" torque wrench, hopefully that will suffice. I assume you are referring to intake...
  29. NT1078

    Periodic rough idle, codes within thread. Plz help!

    Hi all, I am experiencing a periodic rough idle however when given some gas it runs fine. It drives good, no loss of power however the curb idle performance varies- sometimes fine, other times quite rough. Earlier today I removed the MAF sensor to clean it and checked the air filter. I cleared...

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