# Service bulletin PIP5621D

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.

- Type: Service bulletin
- NHTSA id: 10242309
- Published by NHTSA: 2023\-09\-18
- Manufacturer's number: PIP5621D
- Manufacturer's date: 2023\-08\-24
- NHTSA component: 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

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10242309-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10242309-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Transmission and driveline

## Vehicles listed

- 2016 to 2019 BUICK CASCADA
- 2015 to 2022 BUICK ENCLAVE
- 2015 to 2022 BUICK ENCORE
- 2016 to 2022 BUICK ENVISION
- 2015 to 2019 BUICK LACROSSE
- 2015 to 2020 BUICK REGAL
- 2015 to 2017 BUICK VERANO
- 2015 to 2019 CADILLAC ATS
- 2020 to 2022 CADILLAC CT4
- 2020 to 2022 CADILLAC CT5
- 2016 to 2020 CADILLAC CT6
- 2015 to 2019 CADILLAC CTS
- 2015 to 2016 CADILLAC ELR
- 2015 to 2020 CADILLAC ESCALADE
- 2022 CADILLAC ESCALADE
- 2016 CADILLAC ESCALADE ESV
- 2018 to 2019 CADILLAC ESCALADE ESV
- 2021 CADILLAC ESCALADE NA
- 2015 to 2016 CADILLAC SRX
- 2019 to 2022 CADILLAC XT4
- 2017 to 2022 CADILLAC XT5
- 2020 to 2022 CADILLAC XT6
- 2015 to 2019 CADILLAC XTS
- 2019 to 2022 CHEVROLET BLAZER
- 2017 to 2022 CHEVROLET BOLT EV
- 2015 to 2022 CHEVROLET CAMARO
- 2015 CHEVROLET CAPRICE
- 2015 CHEVROLET CAPTIVA
- 2015 to 2017 CHEVROLET CHEVEROLET SS
- 2015 CHEVROLET CITY EXPRESS
- 2015 to 2022 CHEVROLET COLORADO
- 2015 to 2020 CHEVROLET CORVETTE
- 2015 to 2019 CHEVROLET CRUZE
- 2015 to 2022 CHEVROLET EQUINOX
- 2015 to 2021 CHEVROLET EXPRESS
- 2016 CHEVROLET EXPRESS 4500
- 2017 CHEVROLET EXPRESS CUTAWAY VAN
- 2015 to 2020 CHEVROLET IMPALA
- 2015 to 2022 CHEVROLET MALIBU
- 2017 to 2019 CHEVROLET SILVERADO 1500
- 2021 CHEVROLET SILVERADO 1500
- 2015 to 2020 CHEVROLET SILVERADO 2500
- 2022 CHEVROLET SILVERADO 2500
- 2015 CHEVROLET SILVERADO 3500
- 2015 to 2020 CHEVROLET SONIC
- 2015 to 2021 CHEVROLET SPARK
- 2015 to 2022 CHEVROLET SUBURBAN
- 2015 to 2022 CHEVROLET TAHOE
- 2019 CHEVROLET TRAILBLAZER
- 2021 to 2022 CHEVROLET TRAILBLAZER
- 2015 to 2022 CHEVROLET TRAVERSE
- 2015 to 2022 CHEVROLET TRAX
- 2015 to 2019 CHEVROLET VOLT
- 2015 to 2022 GMC ACADIA
- 2015 to 2022 GMC CANYON
- 2015 to 2022 GMC SAVANA
- 2017 to 2019 GMC SIERRA 1500
- 2021 to 2022 GMC SIERRA 1500
- 2015 to 2016 GMC SIERRA 2500
- 2020 GMC SIERRA 2500
- 2015 to 2021 GMC TERRAIN
- 2022 GMC TERRAIN NA
- 2015 to 2022 GMC YUKON

## Recalls for the same vehicles and component

- [26V289000](/recalls/nhtsa/26V289000.md), 2026-05-07: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\)
- [26V085000](/recalls/nhtsa/26V085000.md), 2026-02-13: POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:VALVES/VALVE BODY; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE
- [2026061](/recalls/tc/2026061.md), 2026-02-12: Powertrain
- [2026060](/recalls/tc/2026060.md), 2026-02-12: Powertrain
- [26V083000](/recalls/nhtsa/26V083000.md), 2026-02-12: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:VALVES/VALVE BODY
- [2025118](/recalls/tc/2025118.md), 2025-03-06: Powertrain
- [25V148000](/recalls/nhtsa/25V148000.md), 2025-03-06: POWER TRAIN:AUTOMATIC TRANSMISSION
- [2024679](/recalls/tc/2024679.md), 2024-11-07: Powertrain
- [24V839000](/recalls/nhtsa/24V839000.md), 2024-11-07: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE
- [2024637](/recalls/tc/2024637.md), 2024-10-24: Powertrain

## Other bulletins for the same vehicles and component

- [25\-NA\-080](/bulletins/11026044.md), 2025-12-03, Service bulletin: POWER TRAIN. This service bulletin provides a procedure to overhaul the control valve to replace a plate and worn down check ball to correct the customers concern of No Reverse, No Shift Past Third Gear \- DTC P2732 Set.
- [24\-NA\-262](/bulletins/11026024.md), 2025-12-03, Service bulletin: POWER TRAIN. This bulletin helps aid the tech in possible 10L100 transmission noise that may be normal or abnormal depending on the concern noted.
- [25\-NA\-080](/bulletins/11024334.md), 2025-10-16, Service bulletin: POWER TRAIN. This service bulletin provides a procedure to overhaul the control valve to replace a plate and worn down check ball to correct the customers concern of No Reverse, No Shift Past Third Gear \- DTC P2732 Set.
- [23\-NA\-119](/bulletins/11024331.md), 2025-10-16, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN. This service bulletin provides service procedure information to correct a customer concern of Shift to Park Displayed on DIC When Vehicle is in\- Park, No Start \- DTC B000A Set.
- [N242454441 \-03](/bulletins/11024189.md), 2025-10-09, Service campaign: POWER TRAIN. Certain vehicles listed above, may have a condition where the transmission control valve has worn, resulting in a gradual loss of pressure within the valve. The effects can cause harsh shifting, setting a service engine soon message, reduced engine performance or P0747 diagnostic trouble code. Dealers are to install a new control valve body. The repairs will be made at no charge to the customer.
- [22\-NA\-182](/bulletins/11023369.md), 2025-09-27, Service bulletin: POWER TRAIN. This service bulletin advises the technician to check if the transmission cooler lines are twisted to correct customer concerns of Harsh Shift, Shudder, Surge, Stall, Transmission Overheating and/or High Transmission Fluid Temperature.
- [21\-NA\-238](/bulletins/11020259.md), 2025-07-07, Service bulletin: POWER TRAIN. This technical bulletin provides a procedure to inspect the front pump of the transmission for a possible leak.
- [N252494003\-01](/bulletins/11019752.md), 2025-06-26, Service campaign: POWER TRAIN. Certain vehicles listed above, may have a condition where the connecting rod and/or crankshaft engine components in these vehicles may have manufacturing defects that can lead to engine damage and engine failure. This special coverage covers if an engine failure occurs in the vehicle as a result of the condition described above for a period of 10 years or 150,000 miles \(240,000 km\), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after May 23, 2025, are covered by this special coverage and must be submitted using the labor operation codes provided with this bulletin. Claims with repair orders prior to May 23, 2025, must be submitted to the Service Contract provider. Vehicle owners or lessees who paid for repairs referenced in this Special Coverage \(“Customers”\) are eligible for reimbursement of their reasonable and customary expenses in accordance with the procedures specified below. The conditional right to reimbursement is provided by GM solely in the interest of customer satisfaction and is personal to Customers. Customers may not assign and GM does not consent to any assignment of any Customer’s right to submit reimbursement claims, or to receive reimbursement, or any other rights granted by this Special Coverage to any third party, including but not limited to service contract providers, and this Special Coverage is not intended to and does not confer any third party beneficiary, subrogation or contribution rights, or any other rights to reimbursement, against GM, whether in law, equity or otherwise, on any third parties. Dealers are to replace the engine. The repairs will be made at no charge to the customer.
- [PI0281L](/bulletins/11019516.md), 2025-06-12, Service bulletin: STEERING; POWER TRAIN; SUSPENSION. This preliminary informational \(PI\) bulletin provides information to dealership personnel that may be helpful when addressing underbody component corrosion with customers.
- [N242480631\-02](/bulletins/11018568.md), 2025-05-27, Service campaign: POWER TRAIN. Certain vehicles listed above, may have a condition where the transmission control valve has worn, resulting in a gradual loss of pressure within the valve. The effects can cause harsh shifting, setting a service engine soon message, reduced engine performance or P0747 diagnostic trouble code. This special coverage covers vehicles that return after TCM Update Product Safety N242480630 and have P0747 condition described above for a period of 15 years or 150,000 miles \(240,000 km\), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after March 6, 2025, are covered by this special coverage and must be submitted using the labor operation codes provided with this bulletin. Claims with repair orders prior to March 6, 2025, must be submitted to the Service Contract provider. Vehicle owners or lessees who paid for repairs referenced in this Special Coverage \(“Customers”\) are eligible for reimbursement of their reasonable and customary expenses in accordance with the procedures specified below. The conditional right to reimbursement is provided by GM solely in the interest of customer satisfaction and is personal to Customers. Customers may not assign and GM does not consent to any assignment of any Customer’s right to submit reimbursement claims, or to receive reimbursement, or any other rights granted by this Special Coverage to any third party, including but not limited to service contract providers, and this Special Coverage is not intended to and does not confer any third party beneficiary, subrogation or contribution rights, or any other rights to reimbursement, against GM, whether in law, equity or otherwise, on any third parties. Dealers are to install a new control valve body. The repairs will be made at no charge to the customer.

JSON: [/v1/bulletins/10242309](/v1/bulletins/10242309)

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