DkJohnstone Posted October 16 Share Posted October 16 I have a 2023 Sierra 3500 Diesel AT4. My truck broke down on Aug. 16, 2024. It is still sitting in the shop. There is no projected date for the part to arrive. I am waiting for the Transmission Control Valve. Anyone know what the delay is? Quote Link to comment Share on other sites More sharing options...
ArrowsmithPML Posted October 16 Share Posted October 16 What's wrong with it or do you know? I have a 2021 AT4 3500 and I've all sorts of DEF issues (mostly due to cold weather) but otherwise it's been pretty good. Quote Link to comment Share on other sites More sharing options...
davidm767 Posted October 21 Share Posted October 21 This time last year it took 6 weeks to get my wife's TCV on her 10-speed 10L80 3.0L Duramax. It ended up failing on their test drive and we waited another 6 weeks to get a whole new transmission. It's sad they haven't built up enough TCV spares on both the 6.6L and 3.0L to stamp out long waiting times. I've thankfully had no drivetrain issues on my '24 2500 6.6L Duramax, but my household is sitting at .500 batting average for failures so I'm skeptical at best with the reliability of these 10 speeds both 10L80 and 10L1000. Quote Link to comment Share on other sites More sharing options...
newdude Posted October 21 Share Posted October 21 On 10/16/2024 at 6:37 PM, DkJohnstone said: I have a 2023 Sierra 3500 Diesel AT4. My truck broke down on Aug. 16, 2024. It is still sitting in the shop. There is no projected date for the part to arrive. I am waiting for the Transmission Control Valve. Anyone know what the delay is? I've got one ordered August, another September. Still no parts. GM has no published ETAs for it. All you can do is wait, or trade in and get another truck. Quote Link to comment Share on other sites More sharing options...
Chevyfan3 Posted October 29 Share Posted October 29 On 10/16/2024 at 6:37 PM, DkJohnstone said: I have a 2023 Sierra 3500 Diesel AT4. My truck broke down on Aug. 16, 2024. It is still sitting in the shop. There is no projected date for the part to arrive. I am waiting for the Transmission Control Valve. Anyone know what the delay is? Possibly the latest recall involving this part has something to do with it. They might not have replacements that are not defective yet. How many miles were on your 23' when this happened? Quote Link to comment Share on other sites More sharing options...
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