[llbanks522]

Just use the L6 to shut off the auto/stop function and if it’s colder than 40F the AS won’t engage in “D” anyway. On a similar (22 page thread on the AS function) someone stated that using L6 will lower your gas mileage as you won’t get the enhanced shifting of the gears that the computer gives you when your’re in “D”. Anyone test this? IMHO I don’t think the ECM would change the shifting pattern and timings when in L6 but I don’t know as I’ve only had my 2017 LT for 2 months. I really like the car (coming from a 2002 Honda Civic) BUT do not like the AS feature. I definitely notice it and it feels “clunky” at times so I use L6 90% of the time. I plan to discuss this feature with my Dealer’s Service Manager during my first free oil change.

 

[llbanks522]

My car shifts the same with L or D. And the reason it's clunky. Is because of transmission reconnecting to drive every time the engine is restarted. It's a new experience for all of us. We've never had to deal with it before. You all might as well get used to it. Or if you don't really like it. There's always the $350 - $700 option of shutting it off. Depending on which company you buy from.

The problem with the $350 to $700 option (BNR or TRIFECTA Tune) is kiss goodbye to your Factory Warranty. I’ll stay with the L6 option for now or challenge my “brake pedal habits” to “not” engage AS when stopping at a light or stop sign. (If I can remember I’m in “D” and not “L”). It is challenging for my 71 year old brain. ?

 

[llbanks522]

No one else seems to be having a problem with warranty. 1 guy even got a new piston with a big air kit and performance maf sensor installed. But yeah. That's kind of why I've been hesitant to buy it. Im pretty sure i'll break down and buy it come summer time. It's kind of an annoyance to shift to L.

I’m like you snowwy66 on being hesitant in getting a “tune” because of the warranty. I haven’t seen any member posting about losing warranty coverage over the “tune”. However, on another thread about AS someone posted the actual terms of the GM Warranty which mentioned any changes or modifications to the software will void all warranties. Rest assured if the Dealer Service Tech/Department see’s that the ECM software has been altered/flashed in any way they will use it as an excuse not to cover a warranty repair. I don’t know if that’s something the tech’s look for first or it’s something that’s picked up as an afterthought. I know with my luck it would be the first thing that they see and tell me sorry you altered the ECM program so the repair is not covered. However after all is said and done I STILL REALLY LIKE MY “HOT RED” 2017 LT. (except AS/S ?)

 

[llbanks522]

Given that the new LE2 pistons (particularly #1) have a tendency to fail in the first ~30K or so on a lot of them, I would not tune mine until well after the warranty is gone. I just want a reliable car...and if something does fail in the warranty period, zero chance that I would have to pick up the repair tab on my own dime.[/QUOTE]

Agree jblackburn. “a reliable car that’s fun to drive”
BTW Thank You, I really enjoy this forum!

 

[llbanks522]

I have found in my short time with the auto start stop(2018 TD HB Auto)that it is fairly easy to trick if you plan your approach to intersections and traffic lights by creeping up to them with partial brake pedal and not coming to a “complete” stop if safe/possible, key word safe.

I tried that approach also for awhile but it soon became a royal PITA. I drive in L6 most of the time. Other car manufacturers have the AS/S System also but some of them offer a on/off switch which you have to engage when you start up. GM has elected not to give you a switch/button to shut it off (Unless they figured the L6 option as the off switch?) In any event it looks like more and more cars will have it in the very near future, so “love it” / “hate it” we’ll have to live with it.