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Valve Body Replacement - 2023 Silverado Custom Trail Boss

Michael Lung
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brianf60 Enthusiast

brianf60

Posted
Posted
6 hours ago, TonyTumm said:

 

GM failed me every step of the way on this one. I was paying for a truck I was afraid to use as a truck.

This is exactly where I’m at. I made a huge mistake by buying 2 brand new trucks (Tahoe & Silverado Trailboss) at the same time. I can’t believe I’m saying this but I should have bought one Chevy and one Dodge. Then at least I wouldn’t have both affected by the same flaws.

 I really is said. Both my wife and I really do love our vehicles but we are afraid to drive them any real distance knowing that it may cost us thousands of dollars if it breaks down. Even though hey are under warranty.

 

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Michael Lung
Michael Lung

Man, this thread really took off. Sorry to hear about everyone having similar issues as I did. I’m about 5000 miles into my new transmission and it’s still running fine *knocks on wood*. Keep pressuri

stan hopkins
stan hopkins

Quick update - Got GM customer care involved yesterday and advised them when this hits 30 days on 11-30 I will be looking to make a lemon law claim. They called me back today and advised me the valve

Michael Lung
Michael Lung

As the OG on this thread, first I’d like to start by saying I’m sorry for the people STILL getting dinged with this valve body issue. As far as for me, about 20K miles since the replacement and things

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MCL New Member

MCL

Posted
Posted
On 5/22/2025 at 1:12 PM, Debra Hall said:

What sucks is we have a multi week road trip planned in 2 weeks and it's not looking like I'm going to have my tow vehicle for our trailer.  First Chevy purchase and so far not impressed.   

I feel this. I had always owned Fords, bought a '23 Sierra 3500 Denali Duramax 7 weeks ago. 5 weeks ago I got the P0700/P0747, while 3-states away. Truck is still down at the dealership. Had received one valve body already, but it "failed to calibrate" and the truck would not shift out of first gear. Still waiting on another to arrive. Nothing like buying a truck and it then being in the shop longer than you've had it in your possession, since purchase. Have thousands in rental receipts I'm waiting on GM to reimburse me for, but need to "wait for my repairs to complete", which again we have no ETA for since the parts are on back order. GM has lost any future business from me.

Tom73 Enthusiast

Tom73

Posted
Posted

I did not realize that the Allison transmissions we’re having problems. 

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