2020 GMC Canyon Service and Repair Manual

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Factory-Grade Data

2020 GMC Canyon service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Designed for technicians and DIY owners, this manual helps you troubleshoot accurately, follow step-by-step repair procedures, and reference wiring diagrams and system sections quickly while you work.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Wiring diagrams and electrical sections
  • Powertrain, brakes, steering, suspension, HVAC and more

Trims covered

  • All Terrain Extended Cab Pickup 4-Door
  • SLT Crew Cab Pickup 4-Door
  • SL Extended Cab Pickup 4-Door
  • All Terrain Crew Cab Pickup 4-Door
  • Base Extended Cab Pickup 4-Door
  • Denali Crew Cab Pickup 4-Door
  • SLE Crew Cab Pickup 4-Door
  • Base Crew Cab Pickup 4-Door
  • SLE Extended Cab Pickup 4-Door

Engines covered

  • 3.6L 222Cu. In. V6 GAS DOHC Naturally Aspirated
  • 2.8L 171Cu. In. l4 DIESEL DOHC Turbocharged
  • 2.5L 2457CC 153Cu. In. l4 GAS DOHC Naturally Aspirated

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Hybrid & Electric Vehicle Systems
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams

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Vehicle Safety Data

2020 GMC Canyon Recalls & Complaints

No active recalls The 2020 GMC Canyon has no recalls on file with NHTSA.
TSB #11032777

This PI provides diagnostic tips for diagnosing electric trailer brakes issues.

TSB #11030974

This preliminary information communicates information about how to determine if a wheel and tires size change is available.

TSB #11030092

This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.

TSB #11030091

This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.

TSB #11029950

This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC'ss

TSB #11027701

This PI advised dealer technicians of possible causes of diesel fuel contamination in gasoline powered vehicles and advises of warranty direction.

TSB #11027697

This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC's

TSB #11027689

This PI communicates the proper part numbers for transmission connectors and internal harness to prevent confusion when ordering

Showing the 8 most recent of 857 technical service bulletins on file with NHTSA.

20240108Component: AIR BAGSCrash reported1 injured

The contact owned a 2020 GMC Canyon. The contact stated that while driving at 45 MPH, he crashed into the vehicle in front. The contact stated that the vehicle was switching lanes abruptly, and did no

20260115Component: POWER TRAIN

The main issue is the transmission... It shudders. Now I have to change the oil every 10K miles on it, or it will start shuddering again. It first started when the truck had 50K or a little more mil

20251016Component: SERVICE BRAKES, HYDRAULIC

The contact owns a 2020 GMC Canyon. The contact stated that while her son was attempting to park the vehicle in a parking garage, there was a loud screeching sound coming from the vehicle while depres

20251016Component: ENGINE AND ENGINE COOLING

The contact owns a 2020 GMC Canyon. The contact stated that while her son was attempting to park the vehicle in a parking garage, there was a loud screeching sound coming from the vehicle while depres

20250129Component: ELECTRICAL SYSTEM

The contact owns a 2020 GMC Canyon. The contact stated upon depressing the brake pedal and turning the key in the ignition switch to turn off the vehicle, the key failed to turn to the OFF position an

Showing the 5 most serious of 19 complaints filed with NHTSA.

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