Some customers who drive at elevations higher than 3,300 ft (1,000 m) may complain of a shift shock felt...

Bulletin number

05-003-17-3389

Component

Service brakes

Summary

Some customers who drive at elevations higher than 3,300 ft (1,000 m) may complain of a shift shock felt when shifting into 3rd, 5th and/or Reverse with no AT related DTCs stored. The symptom can be temporarily repaired using the AT initial learning procedure, but may recur after multiple driving cycles. Applicable situations: Shifting up: 2-3 or 4-5, Shifting down: 4-3 or 6-5, NOTE: Shifting from 2-3 or 4-3 is more likely to be felt due to the gear ratio. Shifting into Reverse: D-R, N-Ror P-R, Improper control logic of the TCM may cause improper learning of R-3-5 brake engaging speed when the vehicle is driven at high elevations. To correct this issue, the control logic of the TCM has been modified.

Owners of these vehicles have filed 13 complaints in the brakes category.