21-034-22

Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Uponfurther investigation the technician may find that the following Diagnostic Trouble Code (DTC) has been set: P0735 - Gear 5 Shift Incorrect Ratio. Customers may comment on one or more of the following: Low speed tip in bumps/hesitation. Low speed coast down bump in tow/haul mode. The following enhancement is also available: Low speed coast down throttle improvements during hot/cold conditions/faulted HybridControl Processor (HCP) system state.