What did you do to your NNBS GMT900 Tahoe/Yukon Today?

[Glisella]

Rear passenger door lock actuator. Easier than I thought it would be, mainly because I was worried about clearance as I have large fumbling hands but it worked out well. About 25 mins from start to finish.

 

[CHOO CHOO]

Could be the fuel. Until you run that tank out, be sure the MAF is clean and all the harness connectors are clean and tight, particularly the MAF and throttle body ones.

So should I take it to a shop and have them look at it? Is it safe to drive around until that tanks empties and put reg in? If it's safe, I'll just run it dry and put 87-89 oct in it. I'd rather not take it to the shop and pay diagnostic fees for something I already know.

 

[wjburken]

So should I take it to a shop and have them look at it? Is it safe to drive around until that tanks empties and put reg in? If it's safe, I'll just run it dry and put 87-89 oct in it. I'd rather not take it to the shop and pay diagnostic fees for something I already know.

I think you will be fine with Stabilitrak disabled. I’d drive out the tank and refill as you mentioned.

 

[iamdub]

So should I take it to a shop and have them look at it? Is it safe to drive around until that tanks empties and put reg in? If it's safe, I'll just run it dry and put 87-89 oct in it. I'd rather not take it to the shop and pay diagnostic fees for something I already know.

If it's not stumbling or missing bad enough that you feel it, then drive it out. I'd check those other items, though. You don't wanna hurt the trans with ~200 miles of hard shifts.

 

[Doubeleive]

So should I take it to a shop and have them look at it? Is it safe to drive around until that tanks empties and put reg in? If it's safe, I'll just run it dry and put 87-89 oct in it. I'd rather not take it to the shop and pay diagnostic fees for something I already know.

drive it

 

[bfourman]

Did it shift rough as well. Mines shifting hard into second and third

Can't answer that, wife was driving it. My misfire was caused by the cyl 4 plug boot coming off the terminal.

 

[CHOO CHOO]

Well, cleaned MAF and throttle body, checked all the wires and everything seems to be ok. Light still on so I'll try to run the tank out and see what happens

 

[R3cord303]

So should I take it to a shop and have them look at it? Is it safe to drive around until that tanks empties and put reg in? If it's safe, I'll just run it dry and put 87-89 oct in it. I'd rather not take it to the shop and pay diagnostic fees for something I already know.

I’d bet a dollar that the E85 you put in was garbage. You might try dumping a couple bottles of octane booster in.

 

[CHOO CHOO]

I’d bet a dollar that the E85 you put in was garbage. You might try dumping a couple bottles of octane booster in.

For enough, I'll buy a bottle tomorrow and put it in. Any recommendations? I've never used an octane booster.

 

[gooffeyguy]

Actually get a few bottles of that Heet (yellow bottles) gas line antifreeze and water remover. It contains methanol

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18