If diagnosis for a transmission condition leads to the replacement of the Electronic Transmission Range Selector (ETRS) assembly on 2020-2022 CT4, CT5, XT4, XT5, XT6; and 2021-2022 Escalade models, keep in mind that the assembly is only serviced as a complete unit. (Fig. 15) The shift knob is not serviced separately and there are not any internal components that can be repaired in the dealership. The ETRS system does not have any mechanical linkage to the transmission.
Fig. 15
Do not attempt to remove any of the parts of the ETRS assembly when making repairs. When requested by the Warranty Parts Center (WPC), the assembly should be returned as a complete unit. If the assembly is in several pieces or is damaged, it prevents the unit from being tested as part of the engineering investigation for a root cause of failure. Do not attempt to take the assembly apart or make any repairs to the unit.
Following are examples of parts received at the WPC that could not be tested for internal failures. One assembly had the top of the shift lever knob removed, damaging the unit. (Fig. 16)
Fig. 16
In another example, the shift lever knob was damaged by prying on it in order to remove it from the unit. (Fig. 17)
Fig. 17
Refer to the appropriate Service Information for more details on ETRS assembly diagnosis and repairs. If the ETRS assembly is replaced, it may be necessary to perform programming and setup procedures for the Gear Shift Control Module.
– Thanks to Tom Burlingame
