2020 Trail boss DFM shudder

[ZJulian82]

Hey! I was just curious if they ever fixed it. I think I feel the same thing from time to time. It’s subtle but can definitely feel it. I also feel like the lower gears shift harder from time to time, which I was told all is related to the DFM. I ordered the Pulsar LT so I can deactivate the DFM and hoping it shifts a lot smoother once that’s done. Because outside of that I love this truck. But it’s currently driving me nuts holding my breath every time I start driving to see how the gears are going to shift lol

[sfargo]

I have a similar issue with my 2021 5.3/10S trail boss with only 1000 miles. At low rpm it seems to lurch and chug like its running out of fuel Ive taken it to the dealer and they replied it had a bad camshaft positioning sensor so after over a week in the shop Rotolo Chevrolet of Fontana CA , gave me back truck and said it was fixed. I said id like to test drive first and it was still not fixed. They tried to tell me that's how truck drives and i replied that cant be true or no one would buy this vehicle. It shakes so bad it make me nausious. I almost had an accident in freeway traffic yesterday because it started bucking and the only way to get it to stop is apply throttle and nearly rear ended the car in front of me due to the lurch it takes after stuttering. I've tried to reach out to gm customer service but have had very little response. Somebody please help i need a functioning vehicle thats safe to drive and this trail boss isnt it.

[ajs800]

On 5/18/2021 at 5:11 PM, ZJulian82 said:

Hey! I was just curious if they ever fixed it. I think I feel the same thing from time to time. It’s subtle but can definitely feel it. I also feel like the lower gears shift harder from time to time, which I was told all is related to the DFM. I ordered the Pulsar LT so I can deactivate the DFM and hoping it shifts a lot smoother once that’s done. Because outside of that I love this truck. But it’s currently driving me nuts holding my breath every time I start driving to see how the gears are going to shift lol

what engine tranny combo do you have?  I'm considering purchasing the pulsarLT as well but when I run mine in "L9" it still misses/bucks/shutters when lightly accelerating at cruising speeds so in my case, not so sure it's the DFM.