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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 id10191193
Published by NHTSA2021-05-03
Manufacturer's number18NA358
Manufacturer's date2021-03-19
NHTSA componentSTRUCTURE

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

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
20155912015-12-09. Structure
20151182015-03-18. Structure
14V4890002014-08-08. STRUCTURE

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
24-NA-0032025-04-15. Service bulletin. This technical bulletin provides a procedure to correct the condition of Sunroof Wind / Air Deflector Inoperative.
05-08-51-001L2025-03-08. Service bulletin. This informational bulletin provides a procedure on how to remove the paint stain that may present itself under the shipping film.
22-NA-2442025-02-12. Service bulletin. This warranty administration service bulletin provides information about GM Accessories - Dealer-Installed, Repaired or Replaced During Warranty Coverage Period.
10-08-110-001L2025-02-11. Service bulletin. This service bulletin provides information on proper use of floor mats.
21-NA-0432024-12-10. Service bulletin. This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold (prepping) to the customer.
22-NA-2442024-11-13. Service bulletin. This warranty administration service bulletin provides information about GM Accessories - Dealer-Installed, Repaired or Replaced During Warranty Coverage Period.
23-NA-2192024-11-05. Service bulletin. This service bulletin provides information on Concerns or Questions Regarding Installation of Dealer Installed Accessories.
23-NA-1642024-09-12. Service bulletin. This technical bulletin provides repair information to correct a customer concern of Vehicle Will Lock and Unlock (Active Functions Work) but Will Not Crank or Start (Loss of Passive Functions Do Not Work)
22-NA-2442024-05-30. Warranty extension. This service bulletin provides information about GM Accessories - Dealer-Installed, Repaired or Replaced During Warranty Coverage Period.
PIE02782024-04-08. Service bulletin. Engineering Information.