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I will soon as I get back to North Carolina. But I have read where people have had issues with the TCCM on these trucks.

It was doing this while the fuses and encoder motors were plugged in. I switched the truck to 2wd and unplugged them and removed t case fuse to try and exclude them from possible causes of the malfunction. When in motion the front shaft will try and turn but then pops because it can't. I sure...

Ok guys sorry I haven't been on here I've been traveling with my job( im in Vegas now ). But before I left I had my wife drive forward while I layed on the ground and looked. Come to find out the front drive shaft is trying to turn but it's not even in 4wd. That's the poping and clunking so...

Ok the only code that came back was a multi plug misfire. I didnt change the wires when I swapped out those gimmick E3 plugs someone put in with some NGK IX Iridium's as soon as I bought the truck from my sister 4 weeks ago. I'll change the wires like I should have and the rotor cap too for...

Oh and Slims, no programmer has been installed on this truck.

Ok guys here is an update: Im going to get a code scan today. I was also going to put up a video but the Yukon (aka. Octane) is fine today. Weird huh? No problems at all, no popping, clunking, or jerking. Smooth trans. shifts and all. I mean seriously what the hell!?!?!? Like I said strange...

Re: What is the clunking and poping even in neutral? I will try and get a video up today, I have not had scanned for codes yet. When I acclerate it pops, clunks and jerks, then when i shift to neutral and let it idle, it will surge a fews times like it wants to shut off and hell it did once...

HI everyone I’m the new guy, hope everybody is doing well. I've done some searches and I think I may have a unique problem then again I may not be alone in this situation so here goes: My 1999 Yukon Denali pops and clunks when it’s cold and also shutters like it’s going to shut off, but it stops...