Description
Factory Chevrolet Colorado Wiring Diagrams (2019-2020)
Complete factory-level electrical schematics for the 2019-2020 Chevrolet Colorado mid-size pickup, covering every circuit from engine management to trailer towing – the same documentation referenced by Chevrolet dealership technicians.
Powertrain & Drive Coverage
| Component | Variants Covered |
|---|---|
| Gasoline | 2.5L LCV I-4 (200 hp), 3.6L LGZ V6 (308 hp) |
| Diesel | 2.8L LWN Duramax Turbo-Diesel I-4 (181 hp) |
| Transmissions | 6-speed manual; 6L50 6-speed automatic; 8L45 8-speed automatic |
| Drive | RWD (2WD) and 4WD |
| Model Years | 2019-2020 |
| Badge Twins | GMC Canyon (shared GMT31XX platform) |
Common Colorado Repairs Covered
| System | Procedures |
|---|---|
| Body Control Module (BCM) | Parasitic draw diagnosis; BCM connector pin-out and ground circuit verification |
| Infotainment / MyLink | Radio power/ground circuits, CAN bus wiring, and USB hub connector diagrams |
| Trailer Tow Wiring | 7-pin trailer connector circuits, brake controller wiring, and trailer battery charge feed |
| 4WD Transfer Case Actuator | Transfer case encoder motor circuit, selector switch wiring, and DTC isolation for 4WD engagement faults |
Format & Delivery
PDF. Instant download; lifetime re-downloads.
Frequently Asked Questions
Why does my 2019-2020 Colorado have a parasitic battery drain, and does this manual help diagnose it?
Parasitic draw is a documented concern on this generation Colorado, often traced to BCM wake-up cycles or aftermarket accessory wiring. The manual provides full BCM connector pin-outs, ground distribution diagrams, and individual circuit feeds so you can methodically isolate the offending circuit with a multimeter.
Does the GMC Canyon share these wiring diagrams?
The Colorado and Canyon share the GMT31XX platform and many electrical architectures, but connector locations and some module configurations differ between brands. This manual covers the Chevrolet Colorado specifically; Canyon owners should source the dedicated GMC Canyon wiring diagrams for precise pin-out accuracy.
Are all three engines – including the 2.8L Duramax diesel – fully documented?
Yes. The 2.5L LCV, 3.6L LGZ, and 2.8L LWN Duramax all receive complete engine management schematics, including fuel injection control, glow plug circuits (diesel), exhaust aftertreatment wiring, and transmission control module connections for each paired gearbox.
What format is the manual?
The manual is delivered as a PDF file. It is fully searchable, zoomable for connector detail, and compatible with Windows, Mac, iOS, and Android PDF readers. No internet connection is required after download, and you may re-download at any time.
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