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Service bulletin 20NA071

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 id10174291
Published by NHTSA2020-04-27
Manufacturer's number20NA071
Manufacturer's date2020-03-20
NHTSA componentSERVICE BRAKES, HYDRAULIC:POWER ASSIST; EQUIPMENT

NHTSA's summary

This technical bulletin provides repair information to correct a customer concern of the Service Engine Soon Lamp illuminated and/or Service Power Brake Assist message displayed, with DTCs P0557 or P0558 Stored.

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

Brakes, Equipment and accessories

Trouble codes named

P0557, P0558

Vehicles listed
BUICK ENCLAVE2018, 2019, 2020
CADILLAC XT52017, 2018, 2019, 2020
CADILLAC XT62020
CHEVROLET BLAZER2019, 2020
CHEVROLET TRAVERSE2018, 2019, 2020
GMC ACADIA2017, 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
16V8020002016-11-04. SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER
20165422016-11-03. Brakes

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
23-NA-0742025-05-02. Service bulletin. This service bulletin provides a procedure to add deadener to the batter tray bracket to correct customer concerns of a Service Engine Soon (SES), Reduced Power, Service Brake, Reduced Steering and/or Stabilitrak Message Illuminated on DIC, multiple DTCs.
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.
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.
21-NA-1422025-01-18. Service bulletin. This technical bulletin provides repair information to correct a customer concern of hearing front brake grind/groan noise after sitting overnight.
17-NA-2712024-12-19. Service bulletin. This service bulletin provides a procedure to clean the back side of the rims and rotors and to correct the customer concern of wheel clicking.
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-2442024-05-30. 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.
20-NA-1322024-04-23. Service bulletin. This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.
17-NA-0522024-04-23. Service bulletin. This bulletin updates the position of General Motors on refinishing aluminum wheels. GM has determined that wheel refinishing under warranty will no longer be performed.