kjac

I've had my 2019 Sierra 1500 SLT for a year now, and about 6 months ago I noticed my doors were no longer locking when I stepped away from the vehicle with the fob. I looked in the settings and found passive lock was turned off. I just figured maybe there was a software update and it reset the setting. Now it has happened a second time and I do not know why. I don't fiddle with the settings at all, I only use androidauto. I live alone and no one else drives or has access to my vehicle. The battery has never died, either, so I have no idea why this setting keeps turning off. I included a screenshot of the infotainment screen showing the setting turned off when I never turned it off.

I've had my 2019 Sierra for about 5 months and turned on Passive Door Lock mode shortly after buying the vehicle. The doors have always locked when I stepped out of range during this time, except for today. I drove to the store and after returning to my vehicle I noticed my door was unlocked, then I drove home and noticed it still wasn't locking the doors when I went inside the house. I went through the infotainment door lock settings and found that Passive Door Lock was "off", but it had been turned on for the past 5 months. I live alone, and I'm the only one who has ever driven this vehicle. The battery was never disconnected or allowed to die, and I haven't touched any of the infotainment settings since the first time I configured everything 5 months ago. What could have caused this setting to be changed with no input from me? I liked not having to worry about locking my doors with this setting, but now it feels like a false sense of security.

These are my RPO codes, but as I've come to understand, the codes with M are the transmission codes, but none of mine seem to match up with the transmission codes listed online. XXXXXXXXXXXXXXX,2019,TK10753,04,19,01,WSVSDD, AXK AY0 AZ3 A2X A7E CJ2 C6A DLF D31 EF7 E63 FJW FWI F48 GAZ GU6 G80 H0U IOS I19 J61 KW5 L84 MAH MQE NB5 NP5 NUB QDF RM7 UDD UHN UQF U2K V8D WMK XCQ YF5 Z82 Z85 Z88 3SA 4AA 6LM 7LM 8X2 9X2,8624,,,, EDIT: MQE is the new code for 2019+ models having the 8L90 8-speed transmission.

It's an automatic, but it didn't come with an owners manual so i'm not sure if it's the 6 speed or the 8 speed. I tried looking up the vin number, but it doesn't tell me what transmission it has. Any idea how I could look that up?

I recently purchased a 2019 Sierra 1500 SLE 5.3L (25,000 miles) and I've noticed this issue a few times now. It seems to happen as soon as I leave my driveway and I'm going somwhere around 5-10mph, I'll maintain the same pressure on the accelerator, however the vehicle will stop accelerating for a couple seconds and just coast, then it will resume accelerating without issue. I haven't noticed this happening at stoplights, only when I first leave my house, but i've only been driving it for a week or so. I'm not hearing any noises or any jerking motions etc... when this issue occurs, for all I know it's normal for this vehicle. This is my first GM truck. EDIT: Transmission is 8-speed 8L90