2018 Buick Regal Sportback Service and Repair Manual
2018 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
- 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
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.
A reduction of braking performance can increase the risk of a crash.
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.
General Motors LLC (GM) is recalling certain 2018 Buick Regal vehicles. During the manufacturing process, the rear seat belts may have been improperly routed around the bolster bracket on the rear outboard seats, which can cause inadequate restraint of the passengers.
If the seat belt fails to adequately restrain the passengers in a crash, it can increase the risk of injury.
GM will notify owners, and dealers will inspect the rear outboard seat belts, correcting the routing of the seat belts as necessary, free of charge. The recall began May 14, 2018. Owners may contact Buick customer service at 1-800-521-7300. GM's number for this recall is 18117.
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."
A loss of power brake assist can extend the distance required to stop the vehicle, increasing the risk of a crash.
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.
This preliminary information communicates information about how to determine if a wheel and tires size change is available.
This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.
This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
This service bulletin provides information on Tire Sidewall Irregularities.
This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
This Preliminary Information communication provides information to the technician about vehicles that have had multiple repair attempts that are being performed on customers vehicles that exhibit vibration conditions without utilizing the s
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.
Showing the 8 most recent of 564 technical service bulletins on file with NHTSA.
On Monday, August 14th, at approximately 5 pm, my wife and I were traveling in our 2018 Buick Regal towards a red streetlight. I began applying my brakes to come to a stop. I was several car lengths behind a vehicle that was up ahead. My car's engine then revved up and our vehicle kept on going and jerking front and back although I was applying the brakes. Our car failed to stop so I struck the stationary vehicle. I kept on applying the brakes, but the car kept on going and jerking until I struck the car in front a second time. Our vehicles engine continued to revve up and the brakes continue
September 10, 2022 I was backing out of my driveway, but the car would not slow down, and I hit a tree on my neighbor's easement across the street. After a minute, I decided to move the car, put the car in drive, and again the car would not slow down, and wound up hitting the porch of my neighbor 2 houses over. I have used my left foot for braking since 1966, so it is not a case of mixing up pedals. My wife called 911, the police and ambulance showed up, and I was taken to the hospital. After x-rays, ultrasound, and 2 CT scans, it was determined that I did not have a brain bleed and I wa
VEHICLE WAS IN MOTION: 'DRIVING THROUGH AN EMPTY PARKING LOT. 'FOLLOWED ROAD AROUND THE BUILDING. 'BLINDED BY SUNLIGHT. 'HIT STATIONARY POLE HEAD ' ON. WEATHER CONDITIONS : HEAVY RAIN : PRIOR TO 2:00PM LIGHT RAIN AND SUNSHINE BETWEEN : 2:45PM AND 3:04PM FAULT OR PROBLEM DESCRIPTION: KNEE / LOWER EXTREMITY AIRBAG DEPLOYMENT. HIGH RISK OF LOWER EXTREMITY INJURY FOR BOTH IN-POSITION AND OUT-OF-POSITION SMALL FEMALE DRIVERS. MY LEFT FOOT WAS FORCED UPWARD DUE TO THE FORCE OF CRASH. THE AIRBAGS DEPLOYED WITH SUCH FORCE, IT SNAPPED MY LEFT FOOT DOWNWARD. THE
TL* THE CONTACT OWNS A 2018 BUICK REGAL. THE CONTACT PURCHASED THE VEHICLE IN FEBRUARY OF 2018, BUT DID NOT OBTAIN IT UNTIL JUNE 15, 2018. WHILE IN A DRIVE-THRU LINE, THE CONTACT REMOVED HIS FOOT FROM THE BRAKE PEDAL AND THE VEHICLE LURCHED FORWARD AND CRASHED INTO A POLE. THE FRONT DRIVER SIDE FENDER, BUMPER, AND HEADLIGHT WERE DAMAGED. THERE WERE NO INJURIES AND A POLICE REPORT WAS FILED. THE DEALER (GREINER BUICK GMC, 14555 CIVIC DR., VICTORVILLE, CA 92394) WAS CONTACTED AND REFERRED THE CONTACT TO AN AUTHORIZED BUICK BODY SHOP FOR THE DAMAGES. THE FAILURE WAS NOT DIAGNOSED BY THE DEALER. T
TL* THE CONTACT OWNS A 2018 BUICK REGAL. WHILE DRIVING THROUGH A DRIVE'THRU, THE BRAKE PEDAL WAS DEPRESSED, BUT THE VEHICLE INADVERTENTLY ACCELERATED AND CRASHED INTO A POLE. THE CONTACT EXITED THE VEHICLE, INSPECTED THE DAMAGE, AND CONCLUDED THAT THE VEHICLE WAS ABLE TO BE DRIVEN. THE DEALER (GREINER BUICK GMC, 14555 CIVIC DR., VICTORVILLE, CA 92394, (760) 245-3451) WAS CONTACTED, BUT THE VEHICLE WAS NOT TAKEN TO THE DEALER FOR DIAGNOSTIC TESTING. THE VEHICLE WAS TAKEN TO AN AUTO BODY SHOP WHERE IT WAS AWAITING REPAIRS FOR THE BODY DAMAGE. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. T
My car was part of recall number 22V465, which was supposed to fix a problem with the electronic brake assist system. The recall repair was done in 2023, but after my battery recently died, the same problem has come back — my brakes are very firm, and I have to press hard to stop. The car is showing trouble codes C028F:04, C1586:04, and V0420:71, all related to the electronic brake control module.
This issue is related to the gear shifter on the vehicle. When stopping the car and putting it into park the dashboard shows the message "Shift to Park." this vehicle has only 50,000 miles on it and this issue cause safety issues as the battery on the vehicle will drain as the car can't be turned off with this message. This issue has been reported for this vehicle in NHTSA Bulletin #10252775. However, the manufacturer is stating that it doesn't link to the cars VIN #. With 10 years + of vehicles in the GM family showing this issue and the issue being all over the internet, the issue must be re
Was driving home from work and my brakes suddenly stopped working, if I press all the way down on the brakes they somewhat work. Checked brake fluid and brake lines and everything seems fine. Could this be from vacuum power brake assist fail?
Showing the 8 most serious of 19 complaints filed with NHTSA.
