# Service bulletin 17NA190

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: 10137405
- Published by NHTSA: 2018\-05\-21
- Manufacturer's number: 17NA190
- Manufacturer's date: 2018\-03\-21
- NHTSA component: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\)

## NHTSA's summary

This informational bulletin provides information for technicians during diagnosis for DTC U0420.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10137405-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10137405-0001.pdf)

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

## Components

Transmission and driveline, Automatic transmission, Transmission control module

## Trouble codes named

U0420

## Vehicles listed

- 2017 to 2018 BUICK LACROSSE
- 2016 to 2018 CHEVROLET MALIBU

## 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 \(TCM/PCM/TECM\)

## Other bulletins for the same vehicles and component

- [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.
- [PIC6448](/bulletins/10204461.md), 2021-12-13, Service bulletin: ELECTRICAL SYSTEM; EQUIPMENT; POWER TRAIN:AUTOMATIC TRANSMISSION. This Preliminary information communicates That Techline connect is Not supporting the progaming of the T6 PIM / HPCM. and advies them to call Techline.
- [06\-00\-89\-031D](/bulletins/10201098.md), 2021-09-07, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION; POWER TRAIN; ENGINE. OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification
- [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.
- [06\-00\-89\-031D](/bulletins/10190503.md), 2021-04-20, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE. OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification
- [16\-NA\-407 4](/bulletins/10190232.md), 2021-04-14, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Information on Chassis Control Module \(CCM\) and Hybrid Powertrain Control Module \(HPCM\) Receives Invalid Data and Sets DTC U0422 The technician may find DTC U0422 set. The technician may also find the following DTCs set: • U1534 • U1538 Based on analysis with the BCM and Hybrid Powertrain Control Module \(HPCM\) teams, during vehicle startup \(on occasion\) the PEPS module arbitration along with high bus traffic leads to the BCM or HPCM setting the door open switch virtual device availability \(VDA\) to unavailable. The BCM or HPCM does not update the VDA back to Available until the door switch changes state \(this signal is event based as opposed to periodic\). The ICCM and HPCM sets the U0422 DTC after 1 second of either the door ajar VDA or door open VDA being unavailable
- [16\-NA\-175](/bulletins/10190229.md), 2021-04-13, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:INTERNAL:GEARS; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. SHAKE AND/OR SHUDDER DURING LIGHT THROTTLE ACCELERATION BETWEEN 40 AND 128 KM/H \(25 AND 80 MPH\) AT A STEADY STATE.
- [150089004C](/bulletins/10188403.md), 2021-03-08, Service bulletin: SUSPENSION:FRONT:MACPHERSON STRUT; SUSPENSION:FRONT:SHOCK ABSORBER; POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT. This service bulletin provides technicians with updated information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage.
- [060089031F](/bulletins/10184501.md), 2020-12-21, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE. This service bulletin provides information on OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification.

JSON: [/v1/bulletins/10137405](/v1/bulletins/10137405)

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