I had same prob with 2022 silverado 6.6 diesel. Shift to park message, took it into dealer thinking just 2 years old now, Has got to be covered by warrantee... $1177.67 later Its got 3 year/36000 mi warrantee. 53920 miles on my truck!! So I guess 5 year\50000 mi drivetrain warrantee is up too already. Cant win