NHTSA ID Number: 10187377
Manufacturer Communication Number: 17NA334
Summary
This informational bulletin explains a normal condition caused by exhaust soot blowing by the VGT pivot seal.
7 Affected Products
Vehicles
SEOCONTENT-START
Service Bulletin Bulletin No.: 17-NA-334
Date: December, 2020
INFORMATION
Subject: Information on Diesel Engine Soot Deposits at the Variable Turbine Geometry
(VGT) Pin
Brand: Model:
Model Year: VIN:
Engine: Transmission:
from to from to
Chevrolet![]()
Cruze (Gen
II – VIN B) 2017 2019
— —
Diesel
Equinox (RPO LH7) —
2018 2019
GMC Terrain
Involved Region or Country North America
Condition
4879702
Some customers may comment that combustion deposits or soot (1) can be seen coming
from the turbo actuator pin/arm (2).
Information
This is normal operation and will not affect the function of the turbocharger. There is a
small gap between the seal and the shaft to allow for proper rotation.
Do Not replace the turbocharger.
Page 2 December, 2020 Bulletin No.: 17-NA-334
Parts Information
No parts are required for this repair.
Version 2
Modified Released October 18, 2017
December 08, 2020 – Added the 2019 Model Year.
Additional SI Keywords: waste gate, wastegate
SEOCONTENT-END
1 Associated Document
Manufacturer Communications
Bulletin No.: 17-NA-334
Date: December, 2020
- Helps force air into an internal combustion engine
- Helps increase the amount of air entering your vehicle's engine to create more power with each piston stroke
- Designed, engineered, tested, and warranted for GM vehicles
- Precise fit for ease of installation
- For proper installation, locate your nearest GM dealer, independent service center, or body shop
- Helps force air into an internal combustion engine
- Helps increase the amount of air entering your vehicle's engine to create more power with each piston stroke
- Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
- GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors

- GM Engineers design and validate OE parts specifically for your Chevrolet
, Buick
, GMC, or Cadillac
vehicle
- Helps force air into an internal combustion engine
- Helps increase the amount of air entering your vehicle's engine to create more power with each piston stroke
- Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
- GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors

- GM Engineers design and validate OE parts specifically for your Chevrolet
, Buick
, GMC, or Cadillac
vehicle
- Part Number: 667-206, 49180-04051, 4918004051, 12639941, 12657396, 49180-04075, 49180-04070, 49180-04053, 12668297, 25202345, 12668293, 12668984, 12669004, 12679375, 12679387, 12679, 12685682, 4918004075, 4918004053, 4918004070. Please check the part number /model carefully insure fitment.
- Compatible Vehicle: 12685682 Turbo Turbocharger Compatible With 2016-2019 Buick
Encore 1.4L, 2016-19 Chevrolet
Cruze 1.4L, 2019 Chevrolet
Trax 1.4L, 2016+ SGM (SAIC-GM) Passenger Car with SGE LE2 Engine. - High Quality Materials: All our products are 100% fully tested to ensure top quality. This Turbocharger is made of high-quality materials, with a sturdy and durable structure that can withstand high temperatures and pressures.
- Direct replacement: This Turbo Turbocharger is manufactured with standard specifications for direct replacement and is made of high quality materials to better increase service life.
- Return and Refund Policy: If you have any questions about this product, please feel free to contact us, Your satisfaction is our top priority.
- Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
- GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors

- GM Engineers design and validate OE parts specifically for your Chevrolet
, Buick
, GMC, or Cadillac
vehicle - GM regularly updates production and service part designs to integrate new materials and technologies
Last update on 2026-07-01 / Affiliate links / Images from Amazon Product Advertising API
This product presentation was made with AAWP plugin.





