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  1. SnowBuck

    Check Engine Light

    Found an additional code (P0160). Replaced Oxygen sensor. CEL now out. HOWEVER - discovered this: key to ON CEL is on. Start car CEL goes off. BUTT...if you very quickly stop and then key to ON = no CEL. Turn off, wait 5 seconds and to ON = CEL ON. Almost like something is resetting?!?!? Would...
  2. SnowBuck

    Check Engine Light

    Yes...cel light ON when you turn the key. But Now it goes OUT when started, as normal. What's going on? Been out for 3 days now ?!?!?!? UPDATE: the cel is now BACK ON !!!!!
  3. SnowBuck

    Check Engine Light

    P0650 - Malfunction Indicator Light (MIL) Control Circuit. Came on for 2 days. Now it went off ?!?!?!? What's going on. Anything to worry about?
  4. SnowBuck

    Name That Part

    How did you know I just got a new windshield? LOL It broke when I was up in NJ so I was stuck. Used the worst company ever - Auto Glass Now. Not only did they fail to replace that trim that I now have to buy (right side missing)...there was broken glass all over the floor and console, and they...
  5. SnowBuck

    Name That Part

    2005 Yukon XL Found this laying on top of the battery ???? No clue where it came from !!!! The stamped numbers come up nowhere. 15111339/15045455/151265204/CAV.2 It also has "Carlisle Eng. Prod." stamped on it ?!?!? Did a mechanic lay it there from another car?!?
  6. SnowBuck

    Excessive DownShifting

    2005 Yukon XL 170K miles Recently noticed on the slighted grade, it would down shift. On a flat highway, pressing the pedal at all, like to pass, it would down shift ?!? Would a tranny service help ? Is it from a lack of power? Is it just old age?
  7. SnowBuck

    Intermittent Start - SOLVED

    YOU ARE RIGHT ON !!!!! The Dealer said "We didn't do it!" LOL NOT OEM. The tab was missing, and it must have just corroded or something to make an intermittent contact. Cut it outta there! All's fine now. WHO'D KNOW!?!?!? Just dumb luck I found it when replacing the ignition switch as a...
  8. SnowBuck

    Intermittent Start - SOLVED

    THAT's exactly what my mechanic thought. I AM the 2nd owner. There a thing that pulls out of a part that was screwed to the lower dash. But - it has no tab or anything to easily pull it out. Without it = disabled. But...I can't help thinking it might be an OEM thing...radio controlled...
  9. SnowBuck

    Intermittent Start - SOLVED

    GOT IT ! But - what IS IT ?!?!? While installing a new ignition switch, found this. When holding in Start and nothing...hitting this caused it to start. Looks like some sorta starter interrupt. Taking it out = full start! Has "6900A" on it.
  10. SnowBuck

    Intermittent Start - SOLVED

    Nothing worse then "intermittent" problems. My final solution = install a Remote Start button under the dash !!!!
  11. SnowBuck

    Intermittent Start - SOLVED

    Replaced the Starter solenoid.
  12. SnowBuck

    Intermittent Start - SOLVED

    I think you mean the ECM (Engine Control Module) ? Replaced it. Passlock system wouldn't let it start til I had the Dealer program it. Worked fine for a month, then back to intermittent start.
  13. SnowBuck

    Intermittent Start - SOLVED

    No power to the starter, that's why I replaced the ECM and starter relay. Still intermittent start.
  14. SnowBuck

    Intermittent Start - SOLVED

    Turn the key on. Dash lights come on. Turn to Start = nothing (no crank)! Try 5 or 6 times and maybe it'll start. Runs fine after that...but it's a crapshoot if it'll start again. May go weeks before this happens again. Replaced: battery, Engine Control Module (programmed by Dealer), Starter Relay.
  15. SnowBuck

    SynBlend vs FullSyn

    2005 YukonXL. Always used FULL Synthetic. Last garage did an oil change with Synthetic Blend!!! Should I go and get another oil change???
  16. SnowBuck

    Mandatory Onstar?

    In the middle of West Virginia mountains...maybe Banjo Mtn, I broke down. Hit OnStar and got a reply. Something like "Out of service area" or "No connection" or something like that. OnStar is a TOTAL WASTE !!!
  17. SnowBuck

    Whop Whop Whop sound from exhaust

    Case Closed Warped exhaust manifold.
  18. SnowBuck

    Whop Whop Whop sound from exhaust

    2005 XL. Always had it and was curious what & why. Only on cold startup and goes away after you drive it. Mentioned it when I picked it up from Dealer for something else and they say "normal". Just wondered after all these years what it is.
  19. SnowBuck

    Quoted hours for an oil pan gasket replacement?

    I had it done...drove it in, said I'd pick it up the next morning! They had to drop the front diff (I wouldn't be prepared to do in the driveway). And the gasket is riveted in!!! Yes, replace the O-ring. They also cleaned the intake screen (was 80% sludged up). That was the cause of low oil...
  20. SnowBuck

    Disconnecting 2021 OnStar

    Broke down once in the mountains of WV. Hit the OnStar and got "No Service in Your Area". Canceled it when I got home. BTW - absolutely true = I don't/never have owned a cell phone! Now I wonder if my Smart TV is watching ME ??? LOL
  21. SnowBuck

    Low oil pressure

    You typed the words right off my post on a similar thread. Exact same problem: SLUDGE! Cleaned out the pan & screen...didn't need the O-ring but did it at that point. Pressure back to normal.
  22. SnowBuck

    Any help would be greatly appreciated! LOW OIL PRESSURE

    2005 XL had low oil pressure (22 at idle, 35 highway). Dropped the pan (a pain as you need to lower the front diff) and used a spatula to clean out the SLUDGE. The screen was like 80% blocked too. O-ring was fine but replaced it anyway. IT'S FIXED NOW: 38 at idle, 42-50 highway. That was all it...
  23. SnowBuck

    2021 Yukon XL At4 Dead before leaving Dealer Lot

    You all have convinced me. Keep what I got (already did BOTH banks of lifters). Really wanted a Callaway conversion (560hp) on a new Yukon XL...but too many problems listed here on 2021's. Saw an older Callaway in the parking lot: "Sir...will you please quit licking my car"! LOL LOL Man, was...
  24. SnowBuck

    Why the Red Light?

    Garage said grounds were a corroded mess. Disconnected and cleaned all grounds, new ends and washers. We'll see.
  25. SnowBuck

    Why the Red Light?

    2005 XL. Once-in-a-while I'll be driving, everything acts normal, and I'll see the N (red light) is on !?!?! If I stop and restart, it's off. Happened twice now.

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