Chevrolet Blazer Wiring Diagram Manual 2019–2020 & 2022 – 2.0L Turbo / 2.5L / 3.6L Electrical System, ECM, BCM, ABS, GMLAN & Full Circuit Schematics

Overview

This Chevrolet Blazer wiring manual package provides detailed electrical diagrams for professional diagnostics, wiring repair, harness and connector tracing, module testing and electrical troubleshooting.

The manuals contain dedicated engine-performance circuitry for the 2.5L VIN A and 3.6L VIN S, with the later manuals adding the 2.0L VIN 4 Turbo powertrain.

Vehicle Coverage

• Chevrolet Blazer 2019 LT
  • Header engine: 2.5L
  • Engine circuits include 2.5L VIN A and 3.6L VIN S
  • 138 pages
• Chevrolet Blazer 2020 LT
  • Header engine: 2.0L
  • Engine circuits include 2.0L Turbo VIN 4, 2.5L VIN A and 3.6L VIN S
  • 156 pages
• Chevrolet Blazer 2022 Premier
  • Header engine: 3.6L
  • Engine circuits include 2.0L Turbo VIN 4 and 3.6L VIN S
  • 155 pages
• Engine circuit coverage: 2.0L Turbo / 2.5L / 3.6L
• Total package: 3 PDF manuals / 449 pages
• Approx. total file size: 30.25 MB
• Format: PDF
• Language: English

Technical Highlights

• Engine Control Module (ECM)
• Body Control Module (BCM)
• ABS / Electronic Brake Control Module
• 2.0L Turbo VIN 4 engine circuits
• 2.5L VIN A engine circuits
• 3.6L VIN S engine circuits
• High-speed and low-speed GMLAN
• Computer data lines
• Power distribution
• Ground distribution
• Automatic HVAC / A/C
• Cooling-fan circuits
• Starting and charging
• Automatic transmission
• Shift interlock
• Electronic parking brake
• Anti-theft / passive keyless entry
• Headlights and exterior lighting
• Interior lighting
• Power seats, windows and locks
• Supplemental restraints
• Wiper / washer

Table of Content

• Active Bodyworks
  • Active grille air shutter
  • ECM control
  • LIN communication
  • GMLAN interface
• Air Conditioning / HVAC
  • 2.0L Turbo automatic A/C
  • 2.5L automatic A/C
  • 3.6L automatic A/C
  • HVAC control module
  • Blower motor
  • A/C compressor
  • Temperature sensors
  • Air-door actuators
  • Cooling circuits

The 2020 2.0L HVAC section alone uses a six-part automatic A/C circuit.

• Anti-Lock Brakes
  • ABS / EBCM
  • Brake pressure modulator
  • Wheel-speed sensors
  • Electronic parking brake
  • Brake-pedal position sensing
  • GMLAN communication
• Anti-Theft & Keyless Entry
  • Forced-entry circuits
  • Passive entry
  • Door-handle antennas
  • Keyless-entry control
  • Door locks
  • Immobilizer functions
  • Liftgate integration
• Body Control
  • Body Control Module
  • Lighting control
  • Door and accessory circuits
  • Vehicle wake-up functions
  • Power and ground feeds
• Computer Data Lines
  • High-speed GMLAN
  • Low-speed GMLAN
  • Serial-data circuits
  • LIN communication
  • Module network connections
• Engine Performance
  • 2.0L Turbo VIN 4
  • 2.5L VIN A
  • 3.6L VIN S
  • ECM power and grounds
  • Fuel injection
  • Ignition
  • Turbocharger controls
  • Fuel pressure
  • Oxygen sensors
  • Camshaft and crankshaft sensors
  • EVAP controls
  • Cooling-system sensors

The 2019 manual contains an eight-part 2.5L VIN A engine circuit and a nine-part 3.6L VIN S engine circuit.

• Ground Distribution
  • Engine grounds
  • Body grounds
  • Chassis grounds
  • Instrument-panel grounds
  • Module grounds
• Headlights & Exterior Lighting
  • High / low beam
  • Adaptive front lighting where equipped
  • Turn signals
  • Parking lamps
  • Stop lamps
  • Backup lamps
  • Exterior lighting controls
• Interior Lighting
  • Courtesy lamps
  • Instrument illumination
  • Ambient lighting
• Power Distribution
  • Battery feeds
  • Underhood fuse block
  • Rear fuse block
  • ECM / TCM feeds
  • HVAC feeds
  • Ignition circuits
  • Relays and accessory circuits
• Starting / Charging
  • Starter motor
  • Starter relay
  • Generator
  • Battery circuits
  • ECM start control
• Transmission
  • Automatic transmission
  • Transmission Control Module
  • Internal mode switch
  • Shift controls
  • ECM / TCM communication
  • GMLAN network

The manuals explicitly include transmission circuitry tied to both engine-control and vehicle-data networks.

• Supplemental Restraints
  • Airbags
  • Impact sensors
  • Restraint control module
  • Seat-belt circuits
• Power Accessories
  • Power seats
  • Heated seats
  • Power windows
  • Power door locks
  • Power mirrors
  • Liftgate
• Wiper / Washer
  • Windshield wiper
  • Washer system
  • Wiper controls
  • BCM integration