Stalled out

[OR VietVet]

I appreciate that and as a veteran my self let me say to you. "THANK YOU FOR YOUR SERVICE" ... I have no choice but to keep on keepin on lol. I have more time than money so it just means more garage time.

Right back at ya'. Hopefully you get this problem figured out asap.

 

[Tatman48]

Right back at ya'. Hopefully you get this problem figured out asap.

Will keep ya posted.... Ever forward!

 

[iamdub]

This stalling while rolling to stop torque converter problem and the electrical problems caused by ground connection problems are well documented here on the forum. Many threads about dirty MAF and throttle body cleaning as well and a bunch of fuel pump problem scenarios. IMO, these seem to be a top 5 of many hair pulling problems on here.

Would shifting to neutral before rolling to stop confirm or dismiss this?

This failure will throw a code. If there isn’t a code, it’s almost certain a mechanical failure.


Sent from my iPhone using Tapatalk

Not always. If the erroneous info that a faulty TPS (or any sensor for that matter) is sending the PCM is still within operating parameters, expected or not, then a code may not be thrown.

 

[OR VietVet]

I believe that shifting to neutral would prevent the stall with a bad convertor. My mom, years ago, had a Buick FWD car and this was happening to her and before I fixed it for her I just unplugged at the trans and it stopped the problem till I got in there.

Yes, parameters can be very wide before a code could be set but the driver can still experience the problems and those damn dealer techs will just say that no code so drive it till it is towed in.

 

[vettes980]

I believe that shifting to neutral would prevent the stall.

I also had this thought and originally ruled out the TC bc of it. The trans shop I ended up at said it isn’t always the case.


Sent from my iPhone using Tapatalk

 

[vettes980]

Yes, parameters can be very wide before a code could be set but the driver can still experience the problems and those damn dealer techs will just say that no code so drive it till it is towed in.

I bought my Yukon with the TPS codes present and it would run like normal so the thought of it stalling and being the cause and not throwing codes is wishful thinking.

Your sentiment is widely known however and it is why I replaced numerous sensors chasing my stalling issue.


Sent from my iPhone using Tapatalk

 

[OR VietVet]

In neutral the TC is just spinning. It is not supposed to be engaging anything, if I remember right but I am not a trans tech. I do know about when people start there engines in park and they feel a lurch forward that something is not right but I forget what that was all about. Someone here will cue me in.

 

[vettes980]

In neutral the TC is just spinning. It is not supposed to be engaging anything, if I remember right but I am not a trans tech. I do know about when people start there engines in park and they feel a lurch forward that something is not right but I forget what that was all about. Someone here will cue me in.

But if the computer can’t disengage the TC when it tries to come to a stop, wouldnt putting it in neutral also fail to disengage it?


Sent from my iPhone using Tapatalk

 

[OR VietVet]

That is why I say I am not a trans tech. To me, if the computer cannot disengage the TC electrically, then shifting to neutral does it mechanically. But for all I know I am blowing smoke out my ass with that understanding. I wish I was better at transmission workings inside that case.

 

[vettes980]

That is why I say I am not a trans tech. To me, if the computer cannot disengage the TC electrically, then shifting to neutral does it mechanically. But for all I know I am blowing smoke out my ass with that understanding. I wish I was better at transmission workings inside that case.

Lol, same here! Not an expert on transmissions either. I just know coasting up and into my driveway in neutral still resulted in a stall numerous times, then after pouring in that snake oil on the recommendation from my trans shop it magically stopped it from stalling. My rig would stall like clockwork after so many minutes of driving everyday and since that trip to the trans shop it has staled once.


Sent from my iPhone using Tapatalk

 

[OR VietVet]

Magic fluid unstuck something. Wish it was always that easy.

 

[vettes980]

Lol, same here! Not an expert on transmissions either. I just know coasting up and into my driveway in neutral still resulted in a stall numerous times, then after pouring in that snake oil on the recommendation from my trans shop it magically stopped it from stalling. My rig would stall like clockwork after so many minutes of driving everyday and since that trip to the trans shop it has staled once.


Sent from my iPhone using Tapatalk

Hasn’t stalled once.


Sent from my iPhone using Tapatalk

 

[vettes980]

Magic fluid unstuck something. Wish it was always that easy.

IKR, I feel like I hit the lottery. Unfortunately there’s still probably something failing but I get to kick the can down the road a bit.


Sent from my iPhone using Tapatalk

 

[Tatman48]

Buddy of mine said to confirm. Shift I to tow haul before stopping and it never stalled after. Which confirmed torque converter

 

[Alden]

Hey all I had a weird thing happen this morning. I have an 08 yukon xl denali and just to give background. I had recently had abs ad traction control issues that causes a limp mode. i thought I was going to have to change ecm. I tightened grounds on battery and truck runs great. well this morning I left for work as normal and while coming to a stop she stalled out. she wouldnt start back up. I called for a tow but thenI decided to try to start it again and turned the key and gave it gas and it roared to life. I drove it back home and it ran until I slowed down to pull into driveway and it stalled again. started up the same way by giving it gas and pulled the rest of the way up to property. truck sat there running great while I started other car and when I shut it off it started right back up. no check engine light at all. and only thing on dash is suspension system and service brakes soon. I recently changed caliper and I dont think I got all the air out which is why I believe the service brakes soon is on as the rotors and pads are new front and rear. anyway The stalling is what I am lost on. I replaced the fuel pump last year. I hope that is not the issue again.

 

[Alden]

Hey all I had a weird thing happen this morning. I have an 08 yukon xl denali and just to give background. I had recently had abs ad traction control issues that causes a limp mode. i thought I was going to have to change ecm. I tightened grounds on battery and truck runs great. well this morning I left for work as normal and while coming to a stop she stalled out. she wouldnt start back up. I called for a tow but thenI decided to try to start it again and turned the key and gave it gas and it roared to life. I drove it back home and it ran until I slowed down to pull into driveway and it stalled again. started up the same way by giving it gas and pulled the rest of the way up to property. truck sat there running great while I started other car and when I shut it off it started right back up. no check engine light at all. and only thing on dash is suspension system and service brakes soon. I recently changed caliper and I dont think I got all the air out which is why I believe the service brakes soon is on as the rotors and pads are new front and rear. anyway The stalling is what I am lost on. I replaced the fuel pump last year. I hope that is not the issue again.

Sounds familiar. My 99 2door was doing same thing and ended up being fuel pump fuse under the hood.

 

[Alden]

Try fuel pump fuse

 

[Tatman48]

Magic fluid unstuck something. Wish it was always that easy.

I put that stuff in and mine hasn't stalled one time since I put it in. My fluid is not dark and is normal pinkish color and I know the filter hasn't been changed since I bought the truck. Possibly time for a new trans filter. But at 199k I am weary of a trans flush as I have heard that creates more problems. But so far that additive has helped. I was switching to tow haul mode as I slowed to a stop which kept me from stalling as well.

 

[vettes980]

I put that stuff in and mine hasn't stalled one time since I put it in. My fluid is not dark and is normal pinkish color and I know the filter hasn't been changed since I bought the truck. Possibly time for a new trans filter. But at 199k I am weary of a trans flush as I have heard that creates more problems. But so far that additive has helped. I was switching to tow haul mode as I slowed to a stop which kept me from stalling as well.

How’s the stalling issue?


Sent from my iPhone using Tapatalk

 

[jz57]

I am 2nd one after vettes980 , the symptom in this thread is mostly related to transmission shift, locked torque converter solenoid or other speed shift solenoid, except "N".

The following solution may apply:

1) Install an external auxiliary transmission cooler
2) Drop transmission pan, replace filter and ATF fluid with synthetic one.
3) Add ATF modification, like vettes980 did, or use Lube Guard ATF Protectant

The similar issue happened among 2009 Dodge/Chrysler minivan, the engine stalled after getting off hi-way and at at stoplights. There was a TSB issued to replace solenoid pack.

Similar symptom threads:

2007 Denali hot stall:

https://www.tahoeyukonforum.com/threads/07-denali-hot-stall.26430/page-3

2007 GMC Denali stalls after towing:

https://www.tahoeyukonforum.com/threads/2007-gmc-denali-stalls-after-towing.73312/

Stalled out:

https://www.tahoeyukonforum.com/threads/stalled-out.117045/

Torque converter stays locked up, either from a failing TC or the solenoids or the valve body controlling it. Try a bottle of this before you do anything. This is the cheapest thing you can do. And search this formum for my issue. I’ve documented my issues pretty extensively and I had the same symptoms. Including the crappy feeling you have right now with someone telling you have a failing trans.