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

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Tonyrodz

Resident Resident
Joined
Feb 16, 2012
Posts
33,163
Reaction score
51,354
Location
Central Jersey
So I have been driving around getting the 200 miles relearn done on the transmission, that only took a week and it still didn't seem right so I went by the shop and he said well maybe it's not done relearning he said to drive it for another week and see what it does today made it 400+ miles and so I took it by the shop something is wrong with the 3-4 shift. He thinks it is either the tecm or a piston in the drum, so it goes back Monday.
That sux. Better be free!
 

Just Fishing

Can't fix stupid
Joined
Aug 30, 2020
Posts
4,487
Reaction score
10,082
Location
Utah
So I have been driving around getting the 200 miles relearn done on the transmission, that only took a week and it still didn't seem right so I went by the shop and he said well maybe it's not done relearning he said to drive it for another week and see what it does today made it 400+ miles and so I took it by the shop something is wrong with the 3-4 shift. He thinks it is either the tecm or a piston in the drum, so it goes back Monday.

mechanic does not have the ability to do the relearn function??!

use the tech2, just get that trans like above 170f before you do.

on a side note, hp tuners can do it too. :)
 

Just Fishing

Can't fix stupid
Joined
Aug 30, 2020
Posts
4,487
Reaction score
10,082
Location
Utah
oh yeah, tecm.
did they happen to rebuild yer tecm with the rebuild?
laminates split apparently, mine were going when i did it proactively...
that can cause the trans to be all sorts of weird if the pressure is leaking into the tecm

The parts to do it came with the shiftkit he used ;)
 

Doubeleive

Wes
Supporting Member
Joined
Nov 7, 2017
Posts
30,478
Reaction score
47,829
Location
Stockton, Ca.
oh yeah, tecm.
did they happen to rebuild yer tecm with the rebuild?
laminates split apparently, mine were going when i did it proactively...
that can cause the trans to be all sorts of weird if the pressure is leaking into the tecm

The parts to do it came with the shiftkit he used ;)
they put in a brand new tecm, I think that's what it is though something with the pressure, if I just ***** foot it around it slips in what seems like 2/3 & 3/4, if I give it more pedal it seemed to pull fine or much better anyway, when they gave it to me they put it in relearn mode and told me to take it easy on the first 200 miles because of the new clutches and yada yada
 

Doubeleive

Wes
Supporting Member
Joined
Nov 7, 2017
Posts
30,478
Reaction score
47,829
Location
Stockton, Ca.
and getting this thing to 170 would take some work, like put cardboard over the front end or in front of the coolers with the B&M pan and trucool it sits around 129 all day in the winter, it will only hit 180 in the summer 100+ deg and working it hard.
 

Just Fishing

Can't fix stupid
Joined
Aug 30, 2020
Posts
4,487
Reaction score
10,082
Location
Utah
and getting this thing to 170 would take some work, like put cardboard over the front end or in front of the coolers with the B&M pan and trucool it sits around 129 all day in the winter, it will only hit 180 in the summer 100+ deg and working it hard.

that's my problem right now, i wrote a new tune but i now need to do the relearn.
too freaking cold to get the trans hot enough.
 

Doubeleive

Wes
Supporting Member
Joined
Nov 7, 2017
Posts
30,478
Reaction score
47,829
Location
Stockton, Ca.

Rocket Man

Mark
Supporting Member
Joined
Dec 25, 2014
Posts
26,678
Reaction score
52,941
Location
Oregon
So I have been driving around getting the 200 miles relearn done on the transmission, that only took a week and it still didn't seem right so I went by the shop and he said well maybe it's not done relearning he said to drive it for another week and see what it does today made it 400+ miles and so I took it by the shop something is wrong with the 3-4 shift. He thinks it is either the tecm or a piston in the drum, so it goes back Monday.
Sucks. Good thing it’s not like mine, where I removed it, boxed it and sent it away to get built. That would really suck for you.
 

1BADI5

Elite Member
Joined
Feb 2, 2014
Posts
1,833
Reaction score
2,991
Location
DMV
Welp, just got back from looking at that enclave.
It's freakin mint.
2011, 6 speed, dual sun roofs, leather, etc.
77k on it...
$11,000

I think we are going for it...
it looks like a nightmare to work on. :(

Especially when its time for the timing chain or water pump.........have to drop the whole front cradle out
 

Just Fishing

Can't fix stupid
Joined
Aug 30, 2020
Posts
4,487
Reaction score
10,082
Location
Utah
Especially when its time for the timing chain or water pump.........have to drop the whole front cradle out

didn't think about the water pump :oops:

oh well, I'll own that when it comes time.
Most likely I'll hire the job out to the guy that removed the exhaust bolt in my Tahoe head while i did the afm delete.
he has a two post lift...

The man did a 6.2 swap in his JK jeep... :ehcapt:

Not that he needs the money, but he does odd jobs to offset the cost of his hobbies, and i totally trust him.

so i guess when the water pump needs replacing, do the cam phasers, and timing chain at the same time.
and vice versa :jester:

Or on the other side, an excuse for me to get a two post lift... hmm ;)
 

Rocket Man

Mark
Supporting Member
Joined
Dec 25, 2014
Posts
26,678
Reaction score
52,941
Location
Oregon
didn't think about the water pump :oops:

oh well, I'll own that when it comes time.
Most likely I'll hire the job out to the guy that removed the exhaust bolt in my Tahoe head while i did the afm delete.
he has a two post lift...

The man did a 6.2 swap in his JK jeep... :ehcapt:

Not that he needs the money, but he does odd jobs to offset the cost of his hobbies, and i totally trust him.

so i guess when the water pump needs replacing, do the cam phasers, and timing chain at the same time.
and vice versa :jester:

Or on the other side, an excuse for me to get a two post lift... hmm ;)
I vote for the lift, and then you can do odd jobs to offset the cost of your hobby.o_O
 

mikeyss

Full Access Member
Joined
Nov 11, 2011
Posts
1,755
Reaction score
3,389
Location
Longmont, Colorado.
Welp, just got back from looking at that enclave.
It's freakin mint.
2011, 6 speed, dual sun roofs, leather, etc.
77k on it...
$11,000

I think we are going for it...
it looks like a nightmare to work on. :(

Run away screaming from it. When I was a GM tech, we had 4 of them on average a week in the shop for trans problems, and timing issues. I got so good at dropping the engine, I'd have them out in under 45 mins. Also, changing headlights, air filter, or the oil filter suck bad. These are not good cars I'm sorry to say
 

Just Fishing

Can't fix stupid
Joined
Aug 30, 2020
Posts
4,487
Reaction score
10,082
Location
Utah
lol, figures.
Well my sister has the Chevy version of this as well.
Just got it a few weeks ago, wife decided she wanted to one up her.
I might as well get good at fixing them...

Also time to start looking at two post lifts... lol
:beer:


I also need to get some hp tuners credits, i assume i need to do some tweaking of the converter lockup like the hoe needed to prevent burn up and to totally kill the gas mileage.
:jester:


I also might get my dad to help out with the two post lift $$ if it supports my sister...
Hmmmm
:waytogo:
 

Forum statistics

Threads
137,675
Posts
1,989,125
Members
102,675
Latest member
j_jerry79
Back
Top