My 2021 Chevrolet diesel…
My 2021 Chevrolet diesel work truck with the 10 speed transmission stopped shifting. It has 83,000 miles on it so it’s still under warranty. It went into default mode. 3,000 rpm for 45 mph. We took to the local dealer who diagnosed the shift valve issue. Now it’s sitting at dealer for 3 weeks and no parts available. They have 3 other pickups there with similar issue. Not happy. I took all my tools and supplies out of it so I can get my work done.