# 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. - Type: Service bulletin - NHTSA id: 10183161 - Published by NHTSA: 2020\-11\-30 - Manufacturer's number: 18NA358 - Manufacturer's date: 2020\-10\-16 - NHTSA component: POWER 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 - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10183161-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10183161-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Body and frame, Transmission and driveline, Automatic transmission, Transmission control module ## Vehicles listed - 2014 to 2017 BUICK ENCLAVE - 2014 to 2016 BUICK LACROSSE - 2014 to 2017 BUICK REGAL - 2014 to 2016 CADILLAC SRX - 2014 to 2019 CADILLAC XTS - 2014 to 2017 CHEVROLET EQUINOX - 2014 to 2019 CHEVROLET IMPALA - 2014 to 2015 CHEVROLET MALIBU - 2014 to 2017 CHEVROLET TRAVERSE - 2014 to 2019 GMC ACADIA - 2014 to 2017 GMC TERRAIN ## Recalls for the same vehicles and component - [20V668000](/recalls/nhtsa/20V668000.md), 2020-10-29: POWER TRAIN:AUTOMATIC TRANSMISSION - [16V502000](/recalls/nhtsa/16V502000.md), 2016-07-05: ELECTRICAL SYSTEM:IGNITION; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\) - [14V092000](/recalls/nhtsa/14V092000.md), 2014-02-21: POWER TRAIN:AUTOMATIC TRANSMISSION ## Other bulletins for the same vehicles and component - [PIE0276](/bulletins/10252878.md), 2024-04-08, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT. Engineering Information. - [PIE0270](/bulletins/10252872.md), 2024-04-08, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:COLUMN SHIFT. Engineering Information. - [21\-NA\-245](/bulletins/10252775.md), 2024-04-05, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:COLUMN SHIFT; POWER TRAIN:AUTOMATIC TRANSMISSION:INTERNAL:PARK PAWL; ELECTRICAL SYSTEM:ADAS:PARKING ASSIST:WARNING; POWER TRAIN. This service bulletin provides repair information to correct a customer concern of seeing a Shift to Park Message Displayed in DIC. - [14751](/bulletins/10247236.md), 2023-12-18, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; UNKNOWN OR OTHER. HARSH 5\-4 DOWNSHIFT ON DECELERATION - [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. - [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. - [22\-NA\-107](/bulletins/10213253.md), 2022-06-04, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION. 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. - [18369](/bulletins/10212581.md), 2022-05-31, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; POWER TRAIN; EXTERIOR LIGHTING; POWER TRAIN:AUTOMATIC TRANSMISSION:INTERNAL:CLUTCHES/BANDS:ACTUATORS/SOLENOIDS; AIR BAGS. 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. - [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. 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