This Buick Regal wiring diagram manual package provides complete electrical circuit schematics for the uploaded 2015, 2016, 2018, 2019 and 2020 Regal models, including Regal TourX coverage.
It is designed for workshop diagnostics, electrical troubleshooting, module testing, wiring repair, connector tracing, retrofit planning and professional repair reference.
The package covers earlier 2015–2016 Regal wiring diagrams and later 2018–2020 Regal / Regal TourX wiring diagrams, including ECM, BCM, ABS, GMLAN data networks, active bodyworks, HVAC, cooling fan, lighting, infotainment, restraints, transmission, liftgate and power distribution systems.
Vehicle Coverage
- Buick Regal 2015 Premium
- Engine: 2.4L
- Pages: 138
- Buick Regal 2016 Base
- Engine: 2.4L
- Pages: 138
- Buick Regal 2018 Essence
- Engine: 2.0L
- Pages: 195
- Buick Regal TourX 2019 Preferred
- Engine: 2.0L
- Pages: 153
- Buick Regal 2019 Preferred II
- Engine: 2.0L
- Pages: 163
- Buick Regal 2020 GS
- Engine: 3.6L
- Pages: 163
- Total package size:
- 950 pages
Technical Highlights
- Complete 2.4L, 2.0L and 3.6L engine wiring coverage
- ECM / Engine Control Module circuits
- BCM / Body Control Module wiring
- ABS and Electronic Brake Control Module circuits
- GMLAN computer data line diagrams
- Active bodyworks and pedestrian protection circuits for later models
- Power distribution and fuse block wiring
- Ground distribution circuits
- HVAC, automatic A/C, blower motor and sunload sensor wiring
- Cooling fan and A/C compressor circuits
- Exterior lights, headlamps, backup lamps and horn circuits
- Interior lights, courtesy lamps and instrument illumination wiring
- Navigation, radio, active noise, amplifier and camera circuits
- Memory seats, power seats, lumbar and heated seat wiring
- Power windows, power mirrors, power door locks and liftgate wiring
- Starting, charging, shift interlock and automatic transmission wiring
- Supplemental restraints, warning systems and wiper/washer circuits
Table of Content
- Active Bodyworks
- Active bodyworks circuit
- Pedestrian protection impact detection
- Hood hinge actuator circuits
- Inflatable restraint sensing and diagnostic module links
- Air Conditioning
- Automatic A/C circuit
- HVAC control module wiring
- A/C compressor clutch and solenoid valve
- Blower motor and blower motor control module
- Windshield temperature and inside moisture sensor
- Ambient light / sunload sensor
- Air quality sensor where equipped
- Air temperature sensors and duct sensor circuits
- Mode door, temperature door and air recirculation door actuators
- Anti-Lock Brakes
- Anti-lock brakes circuit
- Electronic Brake Control Module wiring
- Brake pressure modulator circuits
- Brake fluid level sensor
- Wheel speed sensor circuits
- Parking brake switch and park brake system wiring
- Anti-Theft
- Forced entry circuit with passive keyless entry
- Forced entry circuit without passive keyless entry
- Pass-Key circuit
- Power sounder and theft deterrent alarm module
- Keyless entry antenna and door handle wiring
- Body Control Modules
- Body Control Module circuit
- BCM power, ground and signal wiring
- Body module links to lighting, locks, windows, HVAC, seats, liftgate and data networks
- Computer Data Lines
- Computer data lines circuit
- Low speed GMLAN serial data
- High speed GMLAN serial data
- MOST serial data circuits
- Data link connector wiring
- Body, transmission, infotainment and restraint module communication
- Cooling Fan
- Cooling fan circuit
- Left and right cooling fan motor circuits
- Cooling fan relay and speed control wiring
- Cooling fan resistor and radiator support ground wiring
- Cruise Control
- Cruise control circuit
- Steering wheel control wiring
- ECM / BCM cruise control links
- Defoggers
- Defoggers circuit
- Rear defogger relay control
- Rear window defogger and indicator wiring
- Electronic Power Steering
- Electronic power steering circuit
- Steering control module wiring
- Electronic Suspension
- Electronic suspension circuit
- Chassis and suspension control wiring where equipped
- Engine Performance
- 2.4L engine performance / engine controls circuit
- 2.0L VIN X engine performance circuit
- 3.6L VIN S engine performance circuit
- ECM power, ground, sensor and actuator wiring
- Ignition coil and injector circuits
- Fuel pump and fuel level sensor wiring
- Turbocharger boost, bypass and wastegate solenoid circuits
- Intake and exhaust camshaft position circuits
- Oxygen sensor, coolant temperature and oil pressure circuits
- Throttle body, manifold pressure and fuel pressure sensor wiring
- Exterior Lights
- Backup lamps circuit
- Exterior lamps circuit
- Exterior lamps with HID headlamps
- Exterior lamps without HID headlamps
- Tail lamp, license lamp and turn signal circuits
- Ground Distribution
- Ground distribution circuits
- Engine ground points
- Chassis ground points
- Body, HVAC, lighting, infotainment and module ground circuits
- Liftgate, rear lighting and hatchback/wagon ground wiring
- Headlights
- Adaptive front lighting circuit
- Headlamps with halogen headlamps
- Headlamps without halogen headlamps
- Headlamps with high intensity discharge
- Headlamps without high intensity discharge
- Headlamp leveling and control wiring
- Horn
- Horn circuit
- Horn switch and BCM horn control wiring
- Instrument Cluster
- Collision avoidance circuit
- Head-up display circuit
- Instrument cluster circuit
- Driver information center display
- Engine coolant temperature indicator
- Instrument gauge and display communication circuits
- Interior Lights
- Courtesy lamps circuit
- Instrument illumination circuit
- Interior lighting and dimming control wiring
- Memory Systems
- Driver memory seat circuit
- Passenger memory seat circuit
- Memory mirrors circuit
- Memory seat module wiring
- Navigation / Camera / Driver Assistance
- Blind spot monitoring circuit
- Navigation circuit with active noise
- Navigation circuit without active noise
- Navigation circuit with amplifier
- Navigation circuit without amplifier
- Low, mid/high and up-level navigation circuits
- Infotainment, display and audio communication wiring
- Power Distribution
- Power distribution circuits
- Underhood fuse block wiring
- Instrument panel fuse block wiring
- Battery and module power supply circuits
- Relay, fuse and ignition power circuits
- Power Door Locks
- Power door locks with passive keyless entry
- Power door locks without passive keyless entry
- Door latch assembly wiring
- Fuel fill door lock actuator wiring
- Liftgate latch and lock-related circuits
- Power Mirrors
- Electrochromic mirror circuit
- Power mirrors circuit
- Memory mirror wiring where equipped
- Power Seats
- Driver power seat circuit
- Passenger power seat circuit
- Driver lumbar circuit
- Passenger lumbar circuit
- Front heated seats with ventilation
- Front heated seats without ventilation
- Rear heated seats circuit
- Memory seat wiring
- Power Top / Sunroof
- Power top / sunroof circuit with transparent glass fixed
- Power top / sunroof circuit without transparent glass fixed
- Power Windows
- Power windows circuit
- Window motor and switch wiring
- Driver and passenger door module links
- Radio / Audio
- Radio circuit, low level
- Radio circuit, mid level
- Radio circuit, mid/high level
- Radio circuit, up level
- Radio with active noise
- Radio without active noise
- Radio with amplifier
- Radio without amplifier
- Audio amplifier, USB, coax and speaker wiring
- Interior noise microphone and radio volume compensator circuits
- Shift Interlock
- Park brake system circuit
- Shift interlock circuit
- Starting / Charging
- Charging circuit
- Starting circuit
- Starter, generator and battery supply wiring
- Supplemental Restraints
- Supplemental restraints circuit
- Inflatable restraint sensing and diagnostic module
- Airbag, impact sensor, seat belt pretensioner and pedestrian protection wiring
- Transmission
- Automatic transmission circuit
- 8-speed automatic transmission wiring
- 9-speed automatic transmission wiring
- Transmission Control Module circuits
- Rear differential lock circuit where equipped
- Liftgate / Tailgate
- Liftgate release circuit
- Power liftgate circuit
- Liftgate control module and liftgate motor assembly wiring
- Hatchback and wagon liftgate lighting links
- Warning Systems
- Warning systems circuit
- Brake, park brake, door ajar and cluster warning circuits
- Wiper / Washer
- Wiper/washer circuit
- Windshield washer pump
- Windshield wiper switch
- Rear wiper/washer circuit where equipped
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