WenmarOpen by Wenmar Pro

Service bulletin PIP5621C

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10224285
Published by NHTSA2022-10-17
Manufacturer's numberPIP5621C
Manufacturer's date2022-09-14
NHTSA componentPOWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); POWER TRAIN

NHTSA's summary

This Preliminary information communicates to the dealer technician that TAC recommends the utilization of the GDS2 software to aid in diagnosing automatic transmission concerns. TAC is requesting the GDS2 session logs be sent in before the dealer contacts TAC.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Transmission and driveline, Automatic transmission, Transmission control module

Vehicles listed
BUICK CASCADA2016, 2017, 2018, 2019
BUICK ENCLAVE2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
BUICK ENCORE2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
BUICK ENVISION2016, 2017, 2018, 2019, 2020, 2021, 2022
BUICK LACROSSE2015, 2016, 2017, 2018, 2019
BUICK REGAL2015, 2016, 2017, 2018, 2019, 2020
BUICK VERANO2015, 2016, 2017
CADILLAC ATS2015, 2016, 2017, 2018, 2019
CADILLAC CT42020, 2021, 2022
CADILLAC CT52020, 2021, 2022
CADILLAC CT62016, 2017, 2018, 2019, 2020
CADILLAC CTS2015, 2016, 2017, 2018, 2019
CADILLAC ELR2015, 2016
CADILLAC ESCALADE2015, 2016, 2017, 2018, 2019, 2020
CADILLAC ESCALADE2022
CADILLAC ESCALADE ESV2016 (the catalog's model; the bulletin names a series or trim of it)
CADILLAC ESCALADE ESV2018, 2019
CADILLAC ESCALADE NA2021 (the catalog's model; the bulletin names a series or trim of it)
CADILLAC SRX2015, 2016
CADILLAC XT42019, 2020, 2021, 2022
CADILLAC XT52017, 2018, 2019, 2020, 2021, 2022
CADILLAC XT62020, 2021, 2022
CADILLAC XTS2015, 2016, 2017, 2018, 2019
CHEVROLET BLAZER2019, 2020, 2021, 2022
CHEVROLET BOLT EV2017, 2018, 2019, 2020, 2021, 2022
CHEVROLET CAMARO2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
CHEVROLET CAPRICE2015
CHEVROLET CAPTIVA2015
CHEVROLET CHEVEROLET SS2015 to 2017
CHEVROLET CITY EXPRESS2015
CHEVROLET COLORADO2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
CHEVROLET CORVETTE2015, 2016, 2017, 2018, 2019, 2020
CHEVROLET CRUZE2015, 2016, 2017, 2018, 2019
CHEVROLET EQUINOX2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
CHEVROLET EXPRESS2015, 2016, 2017, 2018, 2019, 2020, 2021
CHEVROLET EXPRESS 45002016 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET IMPALA2015, 2016, 2017, 2018, 2019, 2020
CHEVROLET MALIBU2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
CHEVROLET SILVERADO 15002015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 25002015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 35002015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SONIC2015, 2016, 2017, 2018, 2019, 2020
CHEVROLET SPARK2015, 2016, 2017, 2018, 2019, 2020, 2021
CHEVROLET SUBURBAN2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
CHEVROLET TAHOE2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
CHEVROLET TRAILBLAZER2019
CHEVROLET TRAILBLAZER2021, 2022
CHEVROLET TRAVERSE2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
CHEVROLET TRAX2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
CHEVROLET VOLT2015, 2016, 2017, 2018, 2019
GMC ACADIA2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
GMC CANYON2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
GMC SAVANA2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
GMC SIERRA 15002015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 25002015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 35002015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it)
GMC TERRAIN2015, 2016, 2017, 2018, 2019, 2020, 2021
GMC TERRAIN NA2022 (the catalog's model; the bulletin names a series or trim of it)
GMC YUKON2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
26V0850002026-02-13. POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:VALVES/VALVE BODY; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE
26V0830002026-02-12. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:VALVES/VALVE BODY
25V1480002025-03-06. POWER TRAIN:AUTOMATIC TRANSMISSION
24V8390002024-11-07. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE
24V7970002024-10-24. POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:VALVES/VALVE BODY; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE
21V8170002021-10-18. POWER TRAIN:AUTOMATIC TRANSMISSION
20V6680002020-10-29. POWER TRAIN:AUTOMATIC TRANSMISSION
16V5020002016-07-05. ELECTRICAL SYSTEM:IGNITION; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)
14V1520002014-03-31. POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
PI0690B2024-04-29. Service bulletin. MIL Illuminated.
21-NA-2452024-04-05. Service bulletin. This service bulletin provides repair information to correct a customer concern of seeing a Shift to Park Message Displayed in DIC.
PIP5781A2024-02-12. Service bulletin. This Preliminary information communicates that characterizing certain parts is no longer required, the service instruction was changed but technicians are still trying to perform the function causing further confusion.
142042024-01-16. Service bulletin. Inner Tie Rod Torque
148762023-12-18. Service bulletin. 8-speed Transmission Harsh Shift
15NA0452023-12-11. Service bulletin. Rattle Noise Heard From Engine Bell Housing
140730001B2023-12-11. Service bulletin. Information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts
1407300012023-12-11. Service bulletin. Information on Transmission Adaptive Functions
PIP59442023-12-04. Service bulletin. This Preliminary Information communication advises the technician to determine if the incorrect part number TCM has been installed causing DTC P30D9 to set
23-NA-1022023-09-09. Service bulletin. This service bulletin provides a procedure to repair wiring to correct customer concerns of Driveability, Hesitation, Transmission Shifting Rough/Harsh, Malfunction Indicator Lamp (MIL) Illuminated.