Overview
This Chevrolet Express 3500 wiring diagram manual package provides complete electrical circuit schematics for the uploaded 2015–2016, 2018–2020 and 2022 Express 3500 manuals.
It is designed for professional diagnostics, electrical troubleshooting, module testing, wiring repair, connector tracing, fleet maintenance, van conversion wiring reference and workshop repair support.
The package covers major Express 3500 electrical systems including manual A/C, passenger van HVAC, rear A/C, auxiliary HVAC, ECM engine control, BCM body control, ABS, low-speed and high-speed GMLAN communication, power distribution, ground distribution, exterior lighting, interior lighting, navigation, radio, rear view camera, parking assist, transmission, starting/charging, supplemental restraints and wiper/washer wiring.
Vehicle Coverage
- Chevrolet Express 3500 2015 LT
- Engine: 6.6L
- Pages: 101
- Chevrolet Express 3500 2016 LT
- Engine: 6.0L
- Pages: 113
- Chevrolet Express 3500 2018 LT
- Engine: 6.0L
- Pages: 105
- Chevrolet Express 3500 2019 LS
- Engine: 6.0L
- Pages: 108
- Chevrolet Express 3500 2020 Base
- Engine: 6.0L
- Pages: 106
- Chevrolet Express 3500 2022 LT
- Engine: 6.6L
- Pages: 95
- Engine circuit coverage included:
- 2.8L VIN 1 where included
- 4.3L VIN P where included
- 4.8L VIN A / VIN F where included
- 6.0L VIN B / VIN G
- 6.6L VIN L
- 6.6L VIN 7
- Total package size:
- 628 pages
- Approx. total file size: 44.33 MB
- Format: PDF
- Language: English
Technical Highlights
- Complete Chevrolet Express 3500 wiring diagram coverage
- ECM / Engine Control Module wiring
- BCM / Body Control Module circuits
- ABS and brake control wiring
- Low-speed and high-speed GMLAN data line diagrams
- Manual A/C, passenger van A/C and rear A/C circuits
- Auxiliary HVAC and auxiliary blower motor wiring
- Auxiliary fuel-fired coolant heater circuits where included
- Cooling fan clutch and cooling fan control circuits
- Power distribution and fuse block diagrams
- Ground distribution circuits
- Exterior lamps, trailer tow, headlights and horn wiring
- Interior lights and instrument illumination circuits
- Navigation, rear view camera and parking assist wiring
- Blind spot monitoring and lane departure warning circuits where included
- Power door locks, power mirrors, power seats and power windows
- Shift interlock, starting, charging and transmission circuits
- 6-speed and 8-speed transmission wiring where included
- Supplemental restraints, warning systems and wiper/washer circuits
Table of Content
- Air Conditioning
- Manual A/C circuit, cargo van
- Manual A/C circuit, passenger van
- Rear A/C circuit
- Rear A/C circuit provisions
- Front auxiliary HVAC controls
- Auxiliary HVAC mode door actuator
- Auxiliary air temperature door actuator
- Auxiliary blower motor and blower motor resistor
- Auxiliary blower motor low, medium and high speed relays
- HVAC controls switch assembly
- Blower motor and blower motor resistor wiring
- Air temperature door actuator wiring
- A/C compressor clutch circuit
- A/C low side pressure switch
- Auxiliary fuel-fired coolant heater wiring
- Coolant heater control module
- Coolant heater fuel pump and blower motor wiring
- Ambient air temperature sensor circuit
- Anti-Lock Brakes
- Anti-lock brakes circuit
- Anti-lock brakes circuit with JL4
- Anti-lock brakes circuit without JL4
- Electronic Brake Control Module wiring
- Wheel speed sensor circuits
- Brake control and ABS data communication
- ABS power, ground and fuse circuits
- Anti-Theft
- Forced entry circuit
- Pass-Key circuit
- Door lock and security wiring
- Hood switch and theft deterrent links
- Remote function actuator communication
- BCM anti-theft signal wiring
- Body Control Modules
- Body Control Module circuit
- BCM power, ground and signal wiring
- Lighting, locks, HVAC and instrument cluster links
- Power distribution and ignition feed connections
- Wiper/washer and warning system links
- Access panel release and rear body links
- GMLAN and serial data communication
- Computer Data Lines
- Computer data lines circuit
- Low-speed GMLAN serial data
- High-speed GMLAN serial data
- Data link connector wiring
- ECM, BCM, ABS, instrument cluster and transmission communication
- Radio, navigation, rear camera and parking assist data links
- Cooling Fan
- Cooling fan circuit
- Cooling fan clutch circuit
- EV fan clutch fuse and relay wiring
- ECM cooling fan control links
- Engine coolant temperature sensor wiring
- Cruise Control
- Cruise control circuit
- Brake position sensor links
- Steering / control switch wiring
- ECM and GMLAN cruise control communication
- Defoggers
- Defoggers circuit
- Rear window defogger circuit
- Defogger switch wiring
- Heated mirror and rear defogger links where equipped
- Engine Performance
- 2.8L VIN 1 engine performance circuit where included
- 4.3L VIN P engine performance circuit where included
- 4.8L VIN A engine performance circuit where included
- 4.8L VIN F engine performance circuit where included
- 6.0L VIN B engine performance circuit
- 6.0L VIN G engine performance circuit
- 6.6L VIN L engine performance circuit
- 6.6L VIN 7 engine performance circuit
- ECM power, ground and relay wiring
- Fuel injector and ignition coil circuits
- Fuel pump and fuel pressure sensor wiring
- Throttle body and accelerator pedal circuits
- Camshaft and crankshaft sensor wiring
- Engine coolant temperature sensor circuit
- EVAP purge and emissions wiring
- Oxygen sensor and exhaust sensor circuits
- Diesel glow plug and coolant heater-related wiring where included
- A/C compressor and cooling fan control links
- High-speed GMLAN drivetrain communication
- Exterior Lights
- Backup lamps circuit
- Exterior lamps circuit
- Trailer tow circuit
- Stop lamp, park lamp and turn signal wiring
- Side marker, license lamp and rear lamp wiring
- BCM-controlled exterior lighting links
- Ground Distribution
- Ground distribution circuits
- Engine ground points
- Chassis ground points
- Instrument panel ground circuits
- HVAC, lighting, infotainment and module grounds
- Rear body, auxiliary HVAC and frame ground circuits
- Headlights
- Headlights circuit
- Low beam and high beam wiring
- Headlamp switch wiring
- BCM-controlled headlamp circuits
- Horn
- Horn circuit
- Horn relay and horn switch wiring
- BCM horn control links
- Instrument Cluster
- Instrument cluster circuit
- Driver information center wiring
- Engine coolant temperature gauge links
- Warning indicator wiring
- GMLAN communication circuits
- Interior Lights
- Courtesy lamps circuit
- Instrument illumination circuit
- Interior lamp dimming control
- Front and rear interior lighting links
- BCM-controlled lighting wiring
- Navigation / Camera / Driver Assistance
- Blind spot monitoring circuit
- Lane departure warning circuit
- Navigation circuit with UYS
- Navigation circuit without UYS
- Rear view camera circuit
- Rear view camera with touch screen
- Rear view camera without touch screen
- Rear view camera with UYS
- Rear view camera without UYS
- Parking assistant circuit
- Rear object sensor wiring
- Display, radio and camera communication links
- Power Distribution
- Power distribution circuits
- Underhood fuse block wiring
- Passenger compartment fuse block wiring
- Battery feed and ignition feed circuits
- Relay, fuse and module power supply diagrams
- ECM, BCM, HVAC, ABS, radio and transmission power feeds
- Power Door Locks
- Power door locks circuit
- Door latch and lock actuator wiring
- Lock / unlock switch circuits
- Remote function actuator links
- BCM door lock control wiring
- Power Mirrors
- Power mirrors circuit
- Electrochromic mirror circuit
- Electrochromic mirror with forward collision alert
- Electrochromic mirror without forward collision alert
- Heated mirror and defogger-related wiring
- Power Seats
- Power seats circuit
- Driver seat power wiring
- Passenger seat power wiring
- Seat adjustment and lumbar circuits where included
- Seat module power and ground wiring
- Power Windows
- Power windows circuit
- Window switch and motor wiring
- Door harness and BCM window control links
- Radio
- Radio circuit
- Radio circuit with UYS
- Radio circuit without UYS
- Speaker and antenna wiring
- Audio system power and ground circuits
- Infotainment and navigation interface links
- Shift Interlock
- Shift interlock circuit
- Brake signal wiring
- Shift lock control circuit
- Transmission and BCM interlock links
- Starting / Charging
- 2.8L VIN 1 charging circuit where included
- 2.8L VIN 1 starting circuit where included
- 4.3L VIN P charging circuit where included
- 4.3L VIN P starting circuit where included
- 4.8L VIN A charging circuit where included
- 4.8L VIN A starting circuit where included
- 4.8L VIN F charging circuit where included
- 4.8L VIN F starting circuit where included
- 6.0L VIN B charging circuit
- 6.0L VIN B starting circuit
- 6.0L VIN G charging circuit
- 6.0L VIN G starting circuit
- 6.6L VIN L charging circuit
- 6.6L VIN L starting circuit
- 6.6L VIN 7 charging circuit
- 6.6L VIN 7 starting circuit
- Starter relay, generator and battery feed wiring
- ECM start and charge control links
- Supplemental Restraints
- Supplemental restraints circuit
- Inflatable restraint sensing and diagnostic module wiring
- Driver and passenger airbag circuits
- Passenger airbag disable switch and indicator wiring
- Seat belt and restraint sensor wiring
- SRS diagnostic communication
- Transmission
- Transmission circuit
- 6-speed transmission circuit
- 8-speed transmission circuit
- Transmission Control Module wiring
- Transmission range and park/neutral signal wiring
- Shift solenoid and transmission sensor circuits
- High-speed GMLAN drivetrain communication
- Trunk, Tailgate, Fuel Door
- Access panel release circuit
- Rear door / rear body release wiring
- Rear access panel and latch wiring
- BCM release control circuits
- Warning Systems
- Warning systems circuit
- Instrument cluster warning indicators
- Brake, restraint and system status warning links
- Driver information center warning circuits
- Wiper / Washer
- Wiper/washer circuit
- Wiper motor wiring
- Washer pump and switch circuits
- Wiper relay and BCM control links
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