Overview
This Chevrolet Impala wiring diagram manual package provides complete electrical circuit schematics for the uploaded 2015–2016 and 2018–2020 Impala manuals.
It is designed for professional diagnostics, wiring repair, electrical troubleshooting, connector tracing, module testing, power and ground testing, retrofit planning and workshop repair reference.
The package covers major Impala electrical systems including automatic A/C, ECM engine control, BCM body control, ABS, low-speed and high-speed GMLAN communication, power distribution, ground distribution, cooling fan, exterior lighting, interior lighting, navigation, radio, supplemental restraints, transmission, shift interlock, trunk release and wiper/washer wiring.
Vehicle Coverage
- Chevrolet Impala 2015 LS
- Engine: 2.5L
- Pages: 141
- Chevrolet Impala 2016 LTZ
- Engine: 3.6L
- Pages: 145
- Chevrolet Impala 2018 Premier
- Engine: 3.6L
- Pages: 133
- Chevrolet Impala 2019 Premier
- Engine: 3.6L
- Pages: 133
- Chevrolet Impala 2020 LT
- Engine: 3.6L
- Pages: 122
- Engine circuit coverage included:
- 2.5L VIN A
- 2.5L VIN L
- 3.6L VIN 3
- 3.6L VIN N
- Total package size:
- 674 pages
- Approx. total file size: 44.61 MB
- Format: PDF
- Language: English
The engine-performance sections include 2.5L and 3.6L variants, including 2.5L VIN A / VIN L and 3.6L VIN 3 / VIN N circuits where included by the manuals.
Technical Highlights
- Complete Chevrolet Impala electrical wiring coverage
- ECM / Engine Control Module circuits
- BCM / Body Control Module wiring
- ABS and brake control wiring
- Low-speed and high-speed GMLAN data line diagrams
- Automatic A/C and HVAC control module wiring
- Cooling fan and A/C compressor circuits
- Power distribution and fuse block diagrams
- Ground distribution circuits
- Exterior lights, headlights, backup lamps and horn wiring
- Interior lights, courtesy lamps and instrument illumination circuits
- Navigation, radio, camera and infotainment circuits
- Forward collision alert / driver-assistance wiring where included
- Electronic power steering circuits
- Power seats, heated seats, memory-related wiring and seat controls
- Power door locks, mirrors and power windows
- Shift interlock, starting, charging and automatic transmission wiring
- Supplemental restraints, trunk release, warning systems and wiper/washer circuits
Table of Content
- Air Conditioning
- Automatic A/C circuit
- HVAC control module wiring
- HVAC control switch circuits
- Blower motor and blower motor speed control
- A/C compressor clutch wiring
- A/C compressor solenoid valve wiring
- A/C refrigerant pressure sensor circuit
- Windshield temperature and inside moisture sensor
- Ambient light / sunload sensor
- Interior air temperature sensor
- Evaporator temperature sensor
- Air outlet, recirculation and temperature control switch wiring
- Rear defogger relay control links
- Anti-Lock Brakes
- Anti-lock brakes circuit
- Electronic Brake Control Module wiring
- Brake apply sensor wiring
- Wheel speed sensor circuits
- Traction control switch wiring
- ABS power, ground and data communication links
- Anti-Theft
- Forced entry circuit
- Pass-Key / immobilizer circuit
- Keyless entry control module wiring
- Remote function actuator wiring
- Door lock and anti-theft links
- Security indicator and BCM anti-theft communication
- Body Control Modules
- Body Control Module circuit
- BCM power, ground and signal wiring
- Lighting, locks, HVAC and cluster links
- Headlight switch and parking lamp signal links
- Brake apply sensor and traction control switch links
- Remote function actuator receive signal
- Trunk / rear compartment release signal
- Wiper/washer and warning system links
- Low-speed and high-speed GMLAN communication
- Computer Data Lines
- Computer data lines circuit
- Low-speed GMLAN serial data
- High-speed GMLAN serial data
- Network bus circuits
- Data link connector wiring
- ECM, BCM, ABS, HVAC, instrument cluster, radio and transmission communication
- Cooling Fan
- Cooling fan circuit
- Cooling fan low-speed relay wiring
- Cooling fan high-speed relay wiring
- Cooling fan speed control relay wiring
- Left and right cooling fan motor circuits
- Engine coolant temperature links
- ECM cooling fan control wiring
- Cruise Control
- Cruise control circuit
- Adaptive cruise control links where included
- Distance sensing cruise control module wiring
- Brake apply sensor links
- Steering wheel switch communication
- ECM and BCM cruise control links
- Defoggers
- Rear defogger circuit
- Rear defogger switch wiring
- Rear defogger indicator wiring
- Rear defogger relay control
- HVAC and BCM defogger links
- Electronic Power Steering
- Electronic power steering circuit
- Power steering control module wiring
- Steering control signal wiring
- GMLAN communication links
- Power distribution and ground links
- Engine Performance
- 2.5L VIN A engine performance circuit
- 2.5L VIN L engine performance circuit
- 3.6L VIN 3 engine performance circuit
- 3.6L VIN N engine performance circuit
- ECM power, ground and relay wiring
- Fuel injector and ignition coil circuits
- Accelerator pedal position sensor wiring
- Throttle body control wiring
- Fuel tank pressure sensor circuit
- Primary fuel level sensor circuit
- Engine oil pressure and oil level sensor wiring
- Camshaft and crankshaft position sensor circuits
- Engine coolant temperature sensor wiring
- EVAP purge and emission control circuits
- Oxygen sensor and fuel composition sensor wiring where included
- A/C pressure and compressor relay control links
- High-speed GMLAN drivetrain communication
- Exterior Lights
- Backup lamps circuit
- Exterior lamps circuit
- Headlamp switch park lamp signal wiring
- Stop lamp, marker lamp and turn signal wiring
- Puddle lamp and exterior lighting links
- BCM-controlled exterior lighting circuits
- Ground Distribution
- Ground distribution circuits
- Engine ground points
- Chassis ground points
- Instrument panel ground circuits
- HVAC, lighting, infotainment and module grounds
- Battery current sensor and body ground links
- Headlights
- Headlights circuit
- Headlamp switch wiring
- Low beam and high beam control
- Headlamp switch off / on signal wiring
- HID and non-HID headlamp variants where included
- BCM-controlled headlight links
- Horn
- Horn circuit
- Horn relay wiring
- Horn switch signal wiring
- BCM horn control links
- Instrument Cluster
- Instrument cluster circuit
- Driver information center wiring
- Engine coolant temperature gauge wiring
- Warning indicator wiring
- GMLAN communication links
- Interior Lights
- Courtesy lamps circuit
- Instrument illumination circuit
- Interior lamp dimming control
- Interior lamp defeat switch wiring
- Backlight dimming circuits
- BCM-controlled interior lighting links
- Memory Systems / Seats
- Driver power seat circuit
- Passenger power seat circuit
- Heated seat circuit
- Passenger heated seat switch signal
- Seat module power and ground wiring
- Memory-related seat and mirror wiring where included
- Navigation / Camera / Driver Assistance
- Navigation circuit
- Radio / infotainment display wiring
- Rear view camera circuit where included
- Forward collision alert wiring where included
- Parking assist / object detection wiring where included
- Display, antenna and communication module links
- Power Distribution
- Power distribution circuits
- Battery fuse block wiring
- Underhood fuse block wiring
- Instrument panel fuse block wiring
- Relay, fuse and ignition feed diagrams
- Starter relay and ECM power feeds
- HVAC, ABS, BCM, radio and transmission power feeds
- Power Door Locks
- Power door locks circuit
- Door latch and lock actuator wiring
- Driver door lock switch signal
- Child security lock motor wiring
- Remote function actuator links
- BCM door lock control wiring
- Power Mirrors
- Power mirrors circuit
- Mirror adjustment wiring
- Heated mirror / defogger links where included
- Exterior mirror and BCM-related circuits
- Power Top / Sunroof
- Power top / sunroof circuit
- Sunroof switch and motor wiring
- Roof opening panel power and ground circuits
- Power Windows
- Power windows circuit
- Window switch and motor wiring
- Door harness connections
- BCM and body communication links
- Radio
- Radio circuit
- Audio amplifier wiring
- Speaker wiring
- Antenna and infotainment communication links
- Navigation and display interface links
- Shift Interlock
- Shift interlock circuit
- Shift lock solenoid control
- Brake apply signal wiring
- Transmission shift lever position indicator
- BCM and transmission interlock links
- Starting / Charging
- 2.5L starting and charging circuits
- 3.6L starting and charging circuits
- Starter relay wiring
- Starter pinion relay wiring where included
- Generator and battery feed circuits
- Battery current sensor wiring
- ECM start and charge control links
- Supplemental Restraints
- Supplemental restraints circuit
- Inflatable restraint sensing and diagnostic module wiring
- Driver and passenger airbag circuits
- Seat belt and pretensioner wiring
- Passenger presence and restraint warning links
- SRS diagnostic communication
- Transmission
- 2.5L transmission circuit
- 3.6L transmission circuit
- Automatic transmission assembly wiring
- Transmission Control Module wiring
- Transmission fluid pressure switch circuit
- Transmission internal mode switch wiring
- Control solenoid valve assembly wiring
- Tap up / tap down switch signal
- GMLAN drivetrain communication links
- Trunk, Tailgate, Fuel Door
- Trunk release circuit
- Rear compartment lid release wiring
- Rear closure handle switch signal
- Liftglass / rear compartment lid release signal
- BCM trunk release control links
- Warning Systems
- Warning systems circuit
- Instrument cluster warning indicators
- Brake, restraint and system status warning links
- Driver information center warnings
- Collision warning links where included
- Wiper / Washer
- Wiper/washer circuit
- Windshield wiper switch low signal
- Wiper motor wiring
- Washer pump and switch circuits
- BCM wiper/washer control links
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