# Service bulletin 22\-NA\-107

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: 10213253
- Published by NHTSA: 2022\-06\-04
- Manufacturer's number: 22\-NA\-107
- Manufacturer's date: 2022\-05\-20
- NHTSA component: ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION

## NHTSA's summary

This service bulletin provides repair information to correct a customer concern of a Service AWD Message in DIC at Ignition On with DTC C056D Set.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10213253-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10213253-9999.pdf)

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

## Components

Electrical system, Transmission and driveline, Automatic transmission

## Trouble codes named

C056D

## Vehicles listed

- 2020 to 2022 BUICK ENCLAVE
- 2020 to 2022 BUICK ENVISION
- 2020 to 2022 CADILLAC CT4
- 2020 to 2022 CADILLAC CT5
- 2020 to 2022 CADILLAC XT6
- 2019 to 2022 CHEVROLET BLAZER
- 2018 to 2022 CHEVROLET EQUINOX
- 2018 to 2022 CHEVROLET TRAVERSE
- 2018 to 2022 GMC ACADIA
- 2018 to 2022 GMC TERRAIN
- 2022 GMC TERRAIN NA

## Recalls for the same vehicles and component

- [25V148000](/recalls/nhtsa/25V148000.md), 2025-03-06: POWER TRAIN:AUTOMATIC TRANSMISSION
- [24V839000](/recalls/nhtsa/24V839000.md), 2024-11-07: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE
- [21V817000](/recalls/nhtsa/21V817000.md), 2021-10-18: POWER TRAIN:AUTOMATIC TRANSMISSION
- [20V668000](/recalls/nhtsa/20V668000.md), 2020-10-29: POWER TRAIN:AUTOMATIC TRANSMISSION

## Other bulletins for the same vehicles and component

- [21\-NA\-169](/bulletins/10241856.md), 2023-09-06, Service bulletin: POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION. This service bulletin provides diagnostic information/procedures to aid the service technician in diagnosing 9T45/50/60 automatic transmissions with low mileage and DTCs current or history related to the control solenoids and valves.
- [20\-NA\-136](/bulletins/10241855.md), 2023-09-06, Service bulletin: POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION. This informational bulletin describes/outlines the process for the 9T65 Automatic Transmission Replacement Pilot Program \(U.S. Only\).
- [17\-NA\-066](/bulletins/10239647.md), 2023-07-25, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION; POWER TRAIN. This service bulletin provides information for automatic transmission Oil Cooler Flush and flow test.
- [16\-NA\-130](/bulletins/10232711.md), 2023-03-08, Service bulletin: POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:VALVES/VALVE BODY. This service bulletin provides information for after installation of a replacement upper valve body, the transmission may have no Reverse and no 2nd gear.
- [PIP5621C](/bulletins/10224285.md), 2022-10-17, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); POWER TRAIN. 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.
- [PIT5847E](/bulletins/10217783.md), 2022-08-15, Service bulletin: POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:COOLER/RADIATOR:HOSES AND FITTINGS. This Preliminary information communicates that a vehicle may come into the dealer with various concerns which may include a service engine light or various warning messages on the DIC. The technician is instructed to inspect a wiring harness for chaffing on a bracket which is located beneath the battery tray, at a transmission stud and at the transmission oil cooler line bracket. If damage to the harness is found the technician is instructed to repair the damaged wiring and secure the harness away from the bracket so that future damage to the harness will be eliminated.
- [18NA358](/bulletins/10212553.md), 2022-05-31, Service bulletin: EQUIPMENT ADAPTIVE/MOBILITY; POWER TRAIN:AUTOMATIC TRANSMISSION:GEAR POSITION INDICATION \(PRNDL\). This service bulletin provides a procedure to replace the upper and lower valve body housings to correct customer concerns of launch shudder, 2\-3 Upshift or 3\-2 Downshift concerns.
- [21NA169](/bulletins/10205554.md), 2021-12-27, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION. This service bulletin provides diagnostic information/procedures to aid the service technician in diagnosing 9T45/50/60 automatic transmissions with low mileage and DTCs current or history related to the control solenoids and valves.
- [990420002L](/bulletins/10200154.md), 2021-08-09, Service bulletin: POWER TRAIN:MANUAL TRANSMISSION; POWER TRAIN:AUTOMATIC TRANSMISSION; EQUIPMENT. This service bulletin provides information on Driveline Clunk Noise and what is acceptable and what is considered normal operation.
- [17337](/bulletins/10191039.md), 2021-04-29, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\). General Motors has decided to conduct a Voluntary Emission Recall involving certain 2016 model year Chevrolet Colorado, GMC Canyon; 2017 model year Chevrolet Express, GMC Savana; 2017\-2018 model year Chevrolet Colorado, Cruze, Silverado HD, GMC Canyon, Sierra HD and 2018 model year Chevrolet Equinox, GMC Terrain vehicles, equipped with a diesel engine. The engine control module in these vehicles may not properly diagnose a fault in the exhaust particulate matter sensor. Additionally, a subset of these vehicles, certain 2017 model year Chevrolet Silverado HD and GM Sierra HD vehicles, may in rare instances exhibit a condition in which the engine surges up to 2,800 RPM during vehicle coast or vehicle braking. Correction Program the engine control module, and transmission control module when applicable.

JSON: [/v1/bulletins/10213253](/v1/bulletins/10213253)

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