2019 Buick Regal Sportback Service and Repair Manual

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2019 Buick Regal Sportback service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Built for technicians and DIY owners, this manual helps you troubleshoot accurately, follow step-by-step repair procedures, and use wiring diagrams and system sections to diagnose problems faster.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Electrical coverage with wiring diagrams
  • Coverage across key systems: engine, transmission, brakes, steering, suspension, HVAC, and more

Trims covered

  • Preferred II Hatchback 4-Door
  • Base Hatchback 4-Door
  • Essence Hatchback 4-Door
  • Preferred Hatchback 4-Door
  • Avenir Hatchback 4-Door
  • GS Hatchback 4-Door

Engines covered

  • 2.0L 1998CC 122Cu. In. l4 GAS DOHC Turbocharged
  • 3.6L 222Cu. In. V6 GAS DOHC Naturally Aspirated

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Hybrid & Electric Vehicle Systems
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams
NHTSA #18V57600030/08/2018Component: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER

General Motors LLC (GM) is recalling certain 2018-2019 Chevrolet Equinox, Impala, Cruze, Volt and Bolt EV vehicles, GMC Terrain vehicles, Buick Lacrosse and Regal vehicles, Cadillac XTS and XTS Professional vehicles and 2018 Chevrolet Malibu vehicles. The rear brake caliper pistons may have an insufficient coating causing gas pockets to form, potentially reducing rear brake performance.

Consequence

A reduction of braking performance can increase the risk of a crash.

Remedy

GM will notify owners, and dealers will bleed the vehicle's brake system, free of charge. The recall began October 11, 2018. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is 18279.

NHTSA #19V76200024/10/2019Component: SEATS

General Motors LLC (GM) is recalling certain 2019-2020 Buick Regal vehicles. The driver or passenger front seat frames may have a lower crossbar that was improperly welded.

Consequence

Seats with improper welds may not provide adequate protection in the event of a crash, increasing the risk of an injury.

Remedy

GM will notify owners, and dealers will inspect the crossbar welds on the front seats. If the crossbar is improperly welded, the seat back frame will be replaced, free of charge. Interim notices informing owners of the safety risk were mailed November 26, 2019. Owners received a second notice and the recall began February 20, 2020. Owners may contact Buick customer service at 1-800-521-7300. GM's number for this recall is N192278300.

NHTSA #22V46500030/06/2022Component: SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM

General Motors, LLC (GM) is recalling certain 2018-2020 Buick Regal vehicles. In the event of a vacuum-power brake assist failure, a software error in the electronic brake control module (EBCM) may result in a loss of power brake assist. As such, these vehicles fail to conform to Federal Motor Vehicle Safety Standard No. 135, "Light vehicle brake systems."

Consequence

A loss of power brake assist can extend the distance required to stop the vehicle, increasing the risk of a crash.

Remedy

Dealers will update the EBCM software, free of charge. Interim owner notification letters advising owners of the safety risk were mailed on August 19, 2022. Owner notification letters were mailed September 16, 2022. Owners may contact Buick's customer service at 1-800-521-7300.

TSB #11030974

This preliminary information communicates information about how to determine if a wheel and tires size change is available.

TSB #11030092

This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.

TSB #11030091

This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.

TSB #11029950

This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC'ss

TSB #11027697

This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC's

TSB #11027601

This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.

TSB #11026104

This service bulletin provides information on Tire Sidewall Irregularities.

TSB #11026017

This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.

Showing the 8 most recent of 545 technical service bulletins on file with NHTSA.

06/09/20Component: SUSPENSION,POWER TRAIN,ELECTRICAL SYSTEM

Dear NHTSA, I am submitting a formal complaint regarding a 2019 Buick Regal, which I purchased as a used vehicle in 2023 with approximately 19,000 miles. Since owning the car, I have added only 14,000 miles, yet I have experienced multiple significant and ongoing issues that raise serious concerns about the safety, reliability, and warranty service associated with this vehicle. Vehicle Problems: Suspension Issues: Shortly after purchase, the car has had persistent suspension problems, which negatively affect stability and ride quality. The dealership has replaced multiple suspension compone

06/06/20Component: SUSPENSION,POWER TRAIN,ELECTRICAL SYSTEM

My car has had suspension issues for 2 years and I have repeatedly taken the car to the dealership.

04/22/20Component: POWER TRAIN

Intermittent Shift to Park Message Displayed While Vehicle in Park. See #19-NA-206 (through DTC B000A may not be set!). Caused by poor design of shift position switches! This is a KNOWN issue for many GM vehicles including my 2019 Buick Sportback, for nearly 20 years. GM should be made to fix this. In addition to not being able to start car and running down battery because of car power still being on and endangering the personal safety of every person using GM vehicles, it is possible Steering Lock may or may not occur and many vehicle accessories may not operate correctly. GM needs

02/13/20Component: POWER TRAIN,ENGINE

PCV system failed causing excess pressure to blow out the rear main seal and crankcase seal resulting in an oil leak. No lights and no codes were on the dashboard. The only symptom was a high pitched squealing sound during very cold weather. The problem has been reproduced by the dealer. The problem first appeared the first winter owning the vehicle.

01/09/20Component: TIRES

The contact owns a 2019 Buick Regal TourX equipped with Continental Pro Contact tires, Tire Size: 235/50/R18, and DOT [XXX] . The contact stated that while driving on several occasions at various speeds, he observed what he believed to be the tires vibrating. The vehicle was taken to an independent mechanic where it was diagnosed that the belt separated on the inside of the passenger and drivers rear tires. The vehicle was repaired. The manufacturer was notified of the failure. The failure mileage was approximately 38,000. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA)

09/26/20Component: POWER TRAIN

The contact owns a 2019 Buick Regal. The contact stated after parking the vehicle, the “Shift to Park” message was displayed. The contact shifted the gear shifter back and forth to park until the message disappeared. The vehicle was taken to the dealer where it was diagnosed with a failed gear shifter unit and console. The contact was informed that the gear shifter unit and console needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 39,500.

07/17/20Component: SEATS

When I was braking at an intersection, the driver's seat broke and slide all the way forward causing me to jam the brake all the way, then the recoil sent the seat flying all the back. After the orignal pop where something broke, the seat freely slides all the way forward and back.

04/14/20Component: ELECTRICAL SYSTEM,FUEL/PROPULSION SYSTEM

Hello, I am the original owner of my 2019 Buick Regal Sportback which shows a "shift to park message when I attempt to shut off the car and the car shifter is in the park position. I am unable to turn off lights, radio, or accessories. This condition runs down the battery and prevents me from starting the car as the shifter stays locked in position unless the car is running. This should be covered under the GM drivetrain warranty. Please help.

Showing the 8 most serious of 18 complaints filed with NHTSA.

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