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2016 GMC Canyon diesel
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Read all the post on diesel shudder problem, I have the same problem. Had trans computer updated, trans oil and filter changed, $500 later, no help. Has anyone received help from GM yet?
 

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There have been reports of torque converter clutch issues with some 6-speeds, unfortunately it sounds like you're at that point since you've tried everything else. The only help from GM here would be replacing it under warranty, but outside of warranty don't expect any help. There's no recall for the issue, you're stuck having the torque converter replaced on your own dime from the shop of your choice.
 

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Was having extreme transmission shudder before my DPF clogged up entirely... Refuse to pay the $3000 that GM wants for the DPF replacement and installation.
As of now, I have bought DPF flush liquid, a bi-directional OBD reader and some band clamps to see if I cannot clean my DPF and regen myself...
Next issue to solve is a new Torque Converter and Transmission bell housing along with a couple of the shift kits offered by Sonnax. This was my post before my DPF clogged up and my truck turned into lawn art...

Once I get my tranny mechanically sorted out, I am going to do a non-delete tune and just keep cleaning my DPF as needed...
I already had my DEF module and pump replaced along with my second CAT... that was "under GMs dollar" but still cost me $1500 for all the other sensors and misc stuff that they claimed were bad and needed replacing.
 

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All I can say is that if you do have to replace your torque converter , consider the revmax unit .Some folks have reported good results with this stouter unit and it is what I would use if I were ever in your situation .

if you do consider tuning your truck , don't forget the trans tune . The stock factory trans tune is half baked , to say the least .
 

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2016 Z71 CCSB 2.8 Diesel
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Ouch. I bought my 2016 last summer. The day I drove it off the lot, it was shuddering suddenly. I took it back and Chevy dealership replaced everything on their dime. Sorry about your luck. I recently started having power steering problems and Chevy offered me a 100 dollar voucher. The dealership offered to take 700 off the price so asking them seems to be better if you need cost assistance.
 

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Read all the post on diesel shudder problem, I have the same problem. Had trans computer updated, trans oil and filter changed, $500 later, no help. Has anyone received help from GM yet?
Replaced my torque converter under warranty at about 45k miles after numerous visits to the dealer for suttering. It finally just stuck in 3rd gear. Ended up being a combination of 4 instances of main wire harness chafing and the Torque converter. I had lost all confidence in the truck and it was my work truck to tow my trailers. Now at just under 70k, the replaced torque converter and the repaired wire harness its been rock solid. Here in Florida (flat and straight) I get 15mpg all day long pulling a 22ft pontoon work boat with 1500 of extra gear on it. When I Pull my 20' aluma flat bed with 1000lb gear I'm getting 26mpg. These mpg make me a happy camper with my 2016 CC LT 2x4 LB 2.8 with a smart cap.
 

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My 2017 GMC Canyon 2.7 Diesel started shuddering at about 35,000 miles. The dealer made a superficial diagnostic test, determined it was a faulty solenoid and made the repair. The problem resurfaced at 62,000 miles. This time, upon closer inspection, the dealer discovered I needed a new transmission at a cost of $6,400. Note that the shuddering can lead to transmission failure, especially if you're towing. If you have a shuddering problem, have the dealer drop the pan and perform a complete transmission diagnostic.

I filed a suit against GMC and have just closed negotiations with them. They will replace my transmission and give me a 36 month/100,000 mile warranty on the new one. They will also pay more than $10,000 in attorney's fees. It was as clear to GMC as it was to me that the shuddering problem led to the transmission failure, yet I could not get GMC to budge and replace the transmission at their cost. In such cases, I find an attorney that specializes in auto warranty issues. If you've got a good case, they'll accept it and they'll represent you at no cost. It's wasteful to go that route, but that's the only equalizer against the giant.
 

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My 2017 GMC Canyon 2.7 Diesel started shuddering at about 35,000 miles. The dealer made a superficial diagnostic test, determined it was a faulty solenoid and made the repair. The problem resurfaced at 62,000 miles. This time, upon closer inspection, the dealer discovered I needed a new transmission at a cost of $6,400. Note that the shuddering can lead to transmission failure, especially if you're towing. If you have a shuddering problem, have the dealer drop the pan and perform a complete transmission diagnostic.

I filed a suit against GMC and have just closed negotiations with them. They will replace my transmission and give me a 36 month/100,000 mile warranty on the new one. They will also pay more than $10,000 in attorney's fees. It was as clear to GMC as it was to me that the shuddering problem led to the transmission failure, yet I could not get GMC to budge and replace the transmission at their cost. In such cases, I find an attorney that specializes in auto warranty issues. If you've got a good case, they'll accept it and they'll represent you at no cost. It's wasteful to go that route, but that's the only equalizer against the giant.
Correction: 2.8L Diesel
 

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I have a 2016 Canyon diesel with 40,000 miles and it had to have tranny rebuild for same problem (shuddering). I possibly could have got by with just replacing the torque converter but since it was tore down I hade a new valve body installed at the dealers suggestion. I also have a 2014 GMC Terrain with 70,000 miles that DID have to have a complete trans rebuild. I’d like to see a class action lawsuit as I have friends with GM products with the same issues.
 
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