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Service bulletin 20NA170

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 id10186081
Published by NHTSA2021-02-01
Manufacturer's number20NA170
Manufacturer's date2020-12-11
NHTSA componentEQUIPMENT ADAPTIVE/MOBILITY; SERVICE BRAKES; EQUIPMENT; STRUCTURE

NHTSA's summary

This service bulletin provides a procedure to correct a customer concern of a Clicking Type Noise Heard Near Brake Pedal and/or I-Booster Under the Hood.

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, Brakes, Equipment and accessories

Vehicles listed
CHEVROLET BOLT EV2017, 2018, 2019, 2020

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

Recalls for the same vehicles and component
23V8450002023-12-14. SEAT BELTS:PRETENSIONER; STRUCTURE:BODY:ROOF AND PILLARS
22V9300002022-12-15. SEAT BELTS:PRETENSIONER; STRUCTURE:BODY:ROOF AND PILLARS
20216312021-10-14. Accessories
20V8080002020-12-22. SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER
20201302020-03-26. Structure
20184612018-08-30. Brakes
18V5760002018-08-30. SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER

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
25-NA-0652025-04-24. Service bulletin. This informational bulletin instructs the tech when fuel/fluid is needed to be tested and where it can be sent for analysis.
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.
21-NA-0432025-02-12. 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.
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.
22-NA-2442024-05-30. Warranty extension. This service bulletin provides information about GM Accessories - Dealer-Installed, Repaired or Replaced During Warranty Coverage Period.
23-NA-0642024-05-02. Service bulletin. This service bulletin provides information on the Transport Mode Feature, also known as Logistics mode, which is used to increase the 12V Battery stand time of the vehicle during transit and or long period of stand time at the dealerships.