Vehicle briefly stops accelerating for a couple seconds at low speeds.

[kjac]

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

Edited November 24, 2022 by kjac

[silveradosid]

which transmission

[kjac]

2 hours ago, silveradosid said:

which 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? 

[kjac]

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.

Edited November 24, 2022 by kjac

[silveradosid]

you need to find out if it has the new updated transmission fluid

[diyer2]

If it were my truck I would service the trans.

[GMCustomerService]

On 11/23/2022 at 11:45 PM, kjac said:

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

This is certainly not what we like to hear, kjac.  Please know, customer satisfaction is extremely important to us. Our team would be more than happy to take a closer look into the concerns with your 2019 Sierra 1500 SLE. To do so, please send an email to [email protected] with ATTN: kjac/GM Trucks in the subject line.

Please include your contact information, VIN, a brief description of your concern, and the name of your preferred dealership. We look forward to hearing from you. To learn more about GM’s privacy policy, please visit https://www.gm.com/privacy-statement.html.
 
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