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Service bulletin 18NA358

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 id10183161
Published by NHTSA2020-11-30
Manufacturer's number18NA358
Manufacturer's date2020-10-16
NHTSA componentPOWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); STRUCTURE

NHTSA's summary

This technical bulletin provides a procedure to replace the upper and lower valve body housings to correct launch shudder, 2-3 Upshift or 3-2 Downshift concerns.

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

Body and frame, Transmission and driveline, Automatic transmission, Transmission control module

Vehicles listed
BUICK ENCLAVE2014, 2015, 2016, 2017
BUICK LACROSSE2014, 2015, 2016
BUICK REGAL2014, 2015, 2016, 2017
CADILLAC SRX2014, 2015, 2016
CADILLAC XTS2014, 2015, 2016, 2017, 2018, 2019
CHEVROLET EQUINOX2014, 2015, 2016, 2017
CHEVROLET IMPALA2014, 2015, 2016, 2017, 2018, 2019
CHEVROLET MALIBU2014, 2015
CHEVROLET TRAVERSE2014, 2015, 2016, 2017
GMC ACADIA2014, 2015, 2016, 2017, 2018, 2019
GMC TERRAIN2014, 2015, 2016, 2017

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

Recalls for the same vehicles and component
20V6680002020-10-29. POWER TRAIN:AUTOMATIC TRANSMISSION
16V5020002016-07-05. ELECTRICAL SYSTEM:IGNITION; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)
14V0920002014-02-21. POWER TRAIN:AUTOMATIC TRANSMISSION

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
PIE02762024-04-08. Service bulletin. Engineering Information.
PIE02702024-04-08. Service bulletin. Engineering Information.
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.
147512023-12-18. Service bulletin. HARSH 5-4 DOWNSHIFT ON DECELERATION
17-NA-0662023-07-25. Service bulletin. This service bulletin provides information for automatic transmission Oil Cooler Flush and flow test.
PIP5621C2022-10-17. Service bulletin. 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.
PIT5847E2022-08-15. Service bulletin. 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.
22-NA-1072022-06-04. Service bulletin. 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.
183692022-05-31. Service bulletin. Special Coverage. Some vehicles equipped with a 2.0L turbo engine, may have a condition where a wire within the exhaust camshaft position actuator solenoid valve may break. If this were to occur, the Malfunction Indicator Lamp would illuminate, and a diagnostic trouble code DTC P0013 (Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit) would set. The driver may experience rough engine idling or reduced engine torque/power. Dealers are to replace the exhaust camshaft position actuator solenoid valve as necessary. The repairs will be made at no charge to the customer.
18NA3582022-05-31. Service bulletin. 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.