Auto start/Stop feature on Buick 2018 Envision

Bob G.

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I just read that the 2019 Buick Envision will enable you to turn off the auto Start/Stop feature; Since I have just purchased a 2018 will Buick/GM provide a retro fix to the 2018. I life in an area with entrance gated and many round about, this stop feature is going to get someone hurt.
 

Zeroboostbuick

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2018 Regal Sportback - 2010 Yamaha R6 (track bike) Past cars: 92 LeSabre, 98 Regal, 02 GrandPrixGT
#2
If there is a way to retrofit the feature for the previous year car it might or might not be worth the hustle.
Hard to perceive how GM would go about this.... but...

I know for a fact that the GM tech gurus that do the computer programing could easily re-write the ECM-TCM-CCM-BCM-FSCM to disable the start-stop, but weather they're allowed to do so or not is another matter. It would literally take the GM tech fella at the dealership less than 5 minutes to do the service.
 

stoopid

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#3
I know for a fact that the GM tech gurus that do the computer programing could easily re-write the ECM-TCM-CCM-BCM-FSCM to disable the start-stop, but weather they're allowed to do so or not is another matter. It would literally take the GM tech fella at the dealership less than 5 minutes to do the service.
It might be akin to changing the engine programming to reduce efficiency and increase power, after the vehicle's release to market, which would create regulatory issues (CAFE, possibly others). Whether someone in the community can come up with a defeat is a different story, but don't expect GM to do it.
 

Zeroboostbuick

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2018 Regal Sportback - 2010 Yamaha R6 (track bike) Past cars: 92 LeSabre, 98 Regal, 02 GrandPrixGT
#4
It might be akin to changing the engine programming to reduce efficiency and increase power, after the vehicle's release to market, which would create regulatory issues (CAFE, possibly others). Whether someone in the community can come up with a defeat is a different story, but don't expect GM to do it.
HP tuners is working on it but who knows how long and what vehicles will have that support.

So far HPTunets has no support for my 2018 Regal. Even the scanner won't read most of the PID's. One bonus is the the new Regal's E80 ECM has wideband 02 sensors instead of narrowband. But I can't scan KR which to me is just as if not more important.
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NormT

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#5
I had to contact HPTuners support for my E80 2016 Envision 2.0T. You just have a different software version as they may as you to send a debug file, a copy of your tune... I love stop/start and only wish it stopped more often. On our 2017 Acadia Limited we had to have internet connection to read the file. I was still missing PIDs can be found again working through support. I had to clear Vehicle in scanner after downloading the latest beta last week.

Though my battery is not charging on deceleration like it use too while I'm flashing new ecu tunes every couple weeks. I also installed a trailer hitch which has an already installed plug but have lost stop/start since...coincidence?
 

Bob G.

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Thanks for the many replies, and your correct this is nothing more than software update. Now how do we get this to GM and have them answer weather or not they would do this. In my area with the many roundabouts this is a matter of safety
 
170
32
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S.W. Ontario Canada
Buick Ownership
2018 Regal Sportback - 2010 Yamaha R6 (track bike) Past cars: 92 LeSabre, 98 Regal, 02 GrandPrixGT
#7
I had to contact HPTuners support for my E80 2016 Envision 2.0T. You just have a different software version as they may as you to send a debug file, a copy of your tune... I love stop/start and only wish it stopped more often. On our 2017 Acadia Limited we had to have internet connection to read the file. I was still missing PIDs can be found again working through support. I had to clear Vehicle in scanner after downloading the latest beta last week.

Though my battery is not charging on deceleration like it use too while I'm flashing new ecu tunes every couple weeks. I also installed a trailer hitch which has an already installed plug but have lost stop/start since...coincidence?
It makes sense the stop/start disabled itself if it thinks the car is towing something.
 
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Regal TourX Essence | Moon Blue Metallic
#8
HP tuners is working on it but who knows how long and what vehicles will have that support.

So far HPTunets has no support for my 2018 Regal. Even the scanner won't read most of the PID's. One bonus is the the new Regal's E80 ECM has wideband 02 sensors instead of narrowband. But I can't scan KR which to me is just as if not more important.
I hope there's an HPT update. I probably won't tune anything on the car until my bumper-bumper warranty is up, but I would like to dial in the tune a little better and see if I can firm up the trans.
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170
32
28
S.W. Ontario Canada
Buick Ownership
2018 Regal Sportback - 2010 Yamaha R6 (track bike) Past cars: 92 LeSabre, 98 Regal, 02 GrandPrixGT
#9
I hope there's an HPT update. I probably won't tune anything on the car until my bumper-bumper warranty is up, but I would like to dial in the tune a little better and see if I can firm up the trans.
One problem we might have is our ECM and TCM could be locked. And we'd have to take them out and send to hpt to have them unlocked. And i think it costs $200 to unlock each one. Then the trans alone would need 4 credits ? I think.

I hope that's not the case about the unlocking.
 
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