Wicked shake at 80km/h +

[Dambes]

Went to work today and everything was good, had my 2019 Sierra in 4wd as it was a snowstorm. Parked at the office and switched it back to 2wd. When I left i got the truck up to 85-100km/h and it started shaking really bad without stopping. Pulled into a parking lot, switched back to 4wd and then back to 2wd and restarted the truck before driving again. No other issues for the rest of my drive, just wondering if anyone else has had an issue like this?

[ILSilverado]

Well it could be transmission related or transfer case related, I’m guessing transmission torque converter related. Is it the 8 speed? Did you have it in full or part time 4WD?

[Dambes]

Yes it's the speed. I just had it switched over to 4hi for the initial drive into work and than switched back to 2hi when i got there and kept it in 2 when I left and the shake happened 

[blackbay2005]

On 1/25/2020 at 5:44 PM, Dambes said:

Went to work today and everything was good, had my 2019 Sierra in 4wd as it was a snowstorm. Parked at the office and switched it back to 2wd. When I left i got the truck up to 85-100km/h and it started shaking really bad without stopping. Pulled into a parking lot, switched back to 4wd and then back to 2wd and restarted the truck before driving again. No other issues for the rest of my drive, just wondering if anyone else has had an issue like this?

Snow/Ice on wheels throwing them off balance?