Factory Idle Time-Out Solution

mrtizzom · January 11, 2022

4 hours ago, AJMBLAZER said:

It required 2 visits?

I had to go twice because the first visit, the dealer did TSB 21-NA-228 at my direction but the programming for that didn't work in my truck. When I went yesterday, they did 21-NA-056 and the programming for that one did work. If I would have known about 056 the first time, I wouldn't have had to go twice.

mrtizzom · January 11, 2022

3 hours ago, BlaineBug said:

If you have a key I don't believe it matters, the auto stop feature will still shut it down. If you notice your key is more of a button than anything. You don't have to hold the key in the start position until it starts, if you just blip it, the starter stays running until it's started anyway.

So with the key, the vehicle will run after you put it in park until you shut it off. If you have the "push to start" button, then from the factory the vehicle will idle after you put it in park for 30 minutes with the keyless fob out of the vehicle and 1 hour with the fob in the vehicle then it shuts off. This programming removes the idle time-out feature the vehicle came with so it only shuts off if the button is pushed....or it runs out of fuel...which ever comes first.

BlaineBug · January 11, 2022

54 minutes ago, mrtizzom said:

So with the key, the vehicle will run after you put it in park until you shut it off. If you have the "push to start" button, then from the factory the vehicle will idle after you put it in park for 30 minutes with the keyless fob out of the vehicle and 1 hour with the fob in the vehicle then it shuts off. This programming removes the idle time-out feature the vehicle came with so it only shuts off if the button is pushed....or it runs out of fuel...which ever comes first.

Are you sure that with the physical key it won't time out electronically regardless?

mrtizzom · January 12, 2022

16 hours ago, BlaineBug said:

Are you sure that with the physical key it won't time out electronically regardless?

I don't believe so(I could be wrong seeing as I don't have one) but I suppose that is a possibility. I had a buddy that had a 19 custom and his didn't time out after an hour but knowing GM, they could have changed the BCM programming lol

BlaineBug · January 12, 2022

2 hours ago, mrtizzom said:

I don't believe so(I could be wrong seeing as I don't have one) but I suppose that is a possibility. I had a buddy that had a 19 custom and his didn't time out after an hour but knowing GM, they could have changed the BCM programming lol

I would be interested to know.

Sunshine39 · January 26, 2022

On 1/11/2022 at 1:03 PM, mrtizzom said:

So with the key, the vehicle will run after you put it in park until you shut it off. If you have the "push to start" button, then from the factory the vehicle will idle after you put it in park for 30 minutes with the keyless fob out of the vehicle and 1 hour with the fob in the vehicle then it shuts off. This programming removes the idle time-out feature the vehicle came with so it only shuts off if the button is pushed....or it runs out of fuel...which ever comes first.

Sunshine39 · January 26, 2022

I have some questions.

I had this installed today and maybe I don't understand how to make it work.

My 2500HD has a keyfob.

First try I started the truck sitting in it, got out, pushed the lock on the remote and waited to see how long it would run. It ran about 10 minutes and shut off.

Next I just did the rgular remote start with the keyfob and it still ran 10 minutes and shut off.

Any idea what sequence I need to do to make it run longer?

Thanks fo any help

gemarsh · January 26, 2022

3 hours ago, Sunshine39 said:

I have some questions.

I had this installed today and maybe I don't understand how to make it work.

My 2500HD has a keyfob.

First try I started the truck sitting in it, got out, pushed the lock on the remote and waited to see how long it would run. It ran about 10 minutes and shut off.

Next I just did the rgular remote start with the keyfob and it still ran 10 minutes and shut off.

Any idea what sequence I need to do to make it run longer?

Thanks fo any help

Start it with the push button and try not locking it.

mrtizzom · January 26, 2022

11 hours ago, Sunshine39 said:

I have some questions.

I had this installed today and maybe I don't understand how to make it work.

My 2500HD has a keyfob.

First try I started the truck sitting in it, got out, pushed the lock on the remote and waited to see how long it would run. It ran about 10 minutes and shut off.

Next I just did the rgular remote start with the keyfob and it still ran 10 minutes and shut off.

Any idea what sequence I need to do to make it run longer?

Thanks fo any help

I don't do anything special to keep it running. Start the truck via the pushbutton, when I get out I lock it with the fob, and it stays running. If I use the remote start, I start it, let it run for a bit, push the pushbutton, and continue on. Not sure what's going on with your truck sir...

Sunshine39 · January 27, 2022

On 1/25/2022 at 10:37 PM, gemarsh said:

Start it with the push button and try not locking it.

Thanks for the suggestion but my goal is to be able to leave it running, get out and lock the door so dog can have AC and not have anyone open the door to take the dog or the truck.

This morning I tried what was suggested by getting in the truck, started with push button then got out locked the door with the remote.

it ran between 10 and 20 minutes then shut down.

I am thinking the update isn’t working properly.

I appreciate the replies

BlaineBug · January 27, 2022

You will likely have to visit a tuner to be able to make these changes for you.

Dee Cee · March 13, 2022

@mrtizzomdid the program also extend remote start? Right now it is 15 mins and off, 15 mins and off. After total of 30 mins you have to manually start. Also, did you go to Wenzel or Graff?

Joshfire72 · March 15, 2022

Tried calling the dealership and GM tech support about this, they all said that they have never heard of it. I keep going round and round with them over this and it's getting old. I'm about ready to take my truck back or sell it.

AJMBLAZER · March 15, 2022

Did you give them the TSB numbers? They look it up by that.

mrtizzom · March 15, 2022

On 3/13/2022 at 7:34 PM, Dee Cee said:

@mrtizzomdid the program also extend remote start? Right now it is 15 mins and off, 15 mins and off. After total of 30 mins you have to manually start. Also, did you go to Wenzel or Graff?

It didn't extend the remote start time...just keeps it from turning off automatically after you start it manually. I went to Graff...GM gave them a hard time about getting the programming not only for me but a buddy of mine whos also on the fire dept with me.