# 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.

- Type: Service bulletin
- NHTSA id: 10178266
- Published by NHTSA: 2020\-08\-10
- Manufacturer's number: 20NA071
- Manufacturer's date: 2020\-06\-01
- NHTSA component: ELECTRICAL SYSTEM; SERVICE BRAKES, HYDRAULIC:POWER ASSIST; ENGINE

## 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

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10178266-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10178266-9999.pdf)

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

## Components

Brakes, Electrical system, Engine

## Trouble codes named

P0557, P0558

## Vehicles listed

- 2018 to 2020 BUICK ENCLAVE
- 2017 to 2020 CADILLAC XT5
- 2020 CADILLAC XT6
- 2019 to 2020 CHEVROLET BLAZER
- 2018 to 2020 CHEVROLET TRAVERSE
- 2017 to 2020 GMC ACADIA

## Recalls for the same vehicles and component

- [16V802000](/recalls/nhtsa/16V802000.md), 2016-11-04: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER
- [2016542](/recalls/tc/2016542.md), 2016-11-03: Brakes

## Other bulletins for the same vehicles and component

- [00\-06\-01\-026R](/bulletins/11026017.md), 2025-12-03, Service bulletin: ENGINE. This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
- [23\-NA\-153](/bulletins/11024485.md), 2025-10-25, Service bulletin: ENGINE. The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the customer that it is normal for the delay.
- [15\-NA\-010](/bulletins/11020254.md), 2025-07-07, Service bulletin: ENGINE. This service bulletin provides information to dealership personnel for new vehicles with less than 1,000 miles that may not pass California smog inspection or smog inspection in other states.
- [24\-NA\-068](/bulletins/11019547.md), 2025-06-16, Service bulletin: ENGINE; ELECTRICAL SYSTEM. This service bulletin provides a procedure to test and replace the battery distribution fuse block if found the cause of the DTC and electric coolant pump inoperative.
- [21\-NA\-240](/bulletins/11019543.md), 2025-06-16, Service bulletin: ENGINE. This service bulletin provides diagnostic repair information to correct an oil leak in the engine.
- [PIE0794E](/bulletins/11019515.md), 2025-06-12, Service bulletin: ENGINE. This engineering information \(EI Lite\) ends the need for gathering further information using the Field Product Reporting \(FPR\) App process for vehicles where customers comment on having oil leaking from the oil pan that drives a warrantable item type of repair on said vehicles.
- [25\-NA\-100](/bulletins/11019503.md), 2025-06-12, Service bulletin: ENGINE. This warranty administration bulletin provides policy information on vehicles outside of a California Emissions State who move to and register their vehicle in a California Emission State may be entitled to the 7 year, 70,000\-mile Emission Select State Component Limited Warranty.
- [24\-NA\-139](/bulletins/11019378.md), 2025-06-07, Service bulletin: FUEL/PROPULSION SYSTEM; ENGINE. This service bulletin provides a procedure to replace the FPDCM if found to cause customers concerns of Crank No Start, Stalling, Malfunction Indicator Lamp \(MIL\) Illuminated – DTC P023F or P129F Set.
- [24\-NA\-229](/bulletins/11019017.md), 2025-06-03, Service bulletin: ELECTRICAL SYSTEM. This bulletin provides a procedure on how to check for a battery drain utilizing the Picoscope and how to measure the load on the system that may be causing a drain.
- [25\-NA\-087](/bulletins/11017595.md), 2025-05-02, Service bulletin: ELECTRICAL SYSTEM. This service bulletin provides information on the proper Reflective High Temperature Heat and/or Insulating Tape to use for certain repairs, such as Wiring Harness Repairs.

JSON: [/v1/bulletins/10178266](/v1/bulletins/10178266)

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