GM/Chevy updated their Valve body for some 2024/2025 models. The updates were…small at best, but it’s a step in the right direction. Next Gen Drivetrain posted images of the old GM valves vs. the new GM valves, they have their opinion on whether or not this fixes the issue.
Part 1 – Customer Stories with Failures
Part 2 – Valve Body Changes
Part 3 – NHTSA Complaints for 2025 1500 2500 3500
Part 4 – Why I do this
Issues so far.
2020-2022 GMC Recall for transmission rear wheel lockup. This still seems to be affecting 2020-2025, not just 2022.
2024s had a lot of issues for a while, there are rumors there was a company that went bankrupt that was making the valve bodies, GM had to switch sources.
There are some 2025 issues, but not too many yet.
