SilveradoTB217

Update on my 2020 TB 5.3L w/ 10spd: As of today my truck is back at the dealer for a check engine light that came on. I still have a constant low speed shutter, but a new torque converter and transmission valve body have been installed on my truck. I'm starting to think it has something to do with the angle of the driveline or pinion shims on the Trailboss & AT4 models(because of the 2" lift on the trucks) I will keep you guys posted on what the check engine light ended up being. I've got 19k miles on my truck now and its starting to concern me that this issue can't be resolved. On another note: If your a GY Duratrac hater like myself, this truck drives a lot better with Goodyear Ultraterrain AT's(exclusively sold at Discount Tire) I got my Goodyear to swap my duratracs out for them at 1200 miles after multiple failed attempts at high #'s on the road force with the Duratracs. If I end up keeping this truck, I will probably be going back to BFG Ko2's.

Good deal. I'm hoping and assuming that's what my truck is doing b/c your initial post described mine to a T! I love the truck but this issue has been aggravating after coming from a 2017 Silverado with the "chevy shake" issue. Thanks for the response and I will update after my dealer visit.

I'm having this exact same issue in my 2020 Trailboss with the 5.3. The shudder happens after the truck is in top gear and DFM is activated, then you apply very light tip of the throttle and it feels like you just drove over a section of rumble strips until the truck drops to a lower gear. My truck is going back to the dealer tomorrow. I had it at the dealer for the last 2 weeks and they replaced the torque converter. After I picked it up this past Friday, I got a mile down the road and the issue still occurred. I've got 18k miles on my truck and it didn't start getting bad until about 15k. Now I have what seems to be a driveline vibration that's stemming from the DFM acting up. Can you give me an update on what the dealer ended up doing on your truck? I'm going back to my dealer tomorrow morning.

2020 LT Trailboss w/ the 10spd - I also am experiencing this same shutter...mine seems to be more noticeable when the truck is cruising at 20-40mph and only when the accelerator is applied. I have 6400 miles on my truck and will be curios if it gets worse. I previously had a 2016 with the infamous "chevy shake" and I HOPE this isn't something similar in the. making with this new truck. I will be following along to see what your dealer says. Keep us posted. Thanks!