2020 GMC Yukon XL Service and Repair Manual

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Factory-Grade Data

2020 GMC Yukon XL 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

  • SLE Sport Utility 4-Door
  • Denali Sport Utility 4-Door
  • SLT Sport Utility 4-Door

Engines covered

  • 5.3L 5328CC 325Cu. In. V8 FLEX OHV Naturally Aspirated
  • 5.3L 5328CC 325Cu. In. V8 GAS OHV Naturally Aspirated
  • 6.2L 6162CC 376Cu. In. V8 FLEX OHV Naturally Aspirated
  • 6.2L 6162CC 376Cu. In. V8 GAS OHV 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 Yukon XL Recalls & Complaints

NHTSA #21V11500025/02/2021Component: TIRES

General Motors LLC (GM) is recalling certain 2020 Buick Enclave, Cadillac XT4, XT5, Escalade, Escalade ESV, Chevrolet Suburban, Tahoe, Traverse, GMC Yukon, Yukon XL, 2018-2021 Chevrolet Express, GMC S

Consequence

Over cured tires may develop a break in the sidewall resulting in sudden air loss or a belt edge sep

Remedy

GM will notify owners, and dealers will inspect the tires, replacing them as necessary, free of char

NHTSA #19V83700021/11/2019Component: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP

General Motors LLC (GM) is recalling certain 2020 Cadillac Escalade, Escalade ESV, Chevrolet Camaro, Silverado 1500, Suburban, Tahoe, GMC Sierra 1500, Yukon, and Yukon XL vehicles. The fuel pump may

Consequence

Over-pressurization can crack the fuel pump and cause leaks, increasing the risk of a fire in the pr

Remedy

GM will notify owners, and dealers will replace the fuel pump, free of charge. The recall began Dec

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 #11028700

This preliminary information communicates an issue with aftermarket LED headlights causing IPC warning messages and MIL along with several low speed lan DTCs.

TSB #11027701

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

TSB #11027698

This PI Communications information on an alternative product dealers can use to perform 19-NA-255: Wax Coating on Frame Peeling, Metal Shows Corrosion/Rusting due to issue with getting product from current supplier listed in the bulletin.

Showing the 8 most recent of 712 technical service bulletins on file with NHTSA.

20210517Component: AIR BAGSCrash reported1 injured

GMC SUV - Hydroplaned -- could not achieve Traction Control despite moving away from water patch.. Front Angle Crashed into Concrete Median; All Side Airbags Deployed, No Front Airbags Deployed.

20210517Component: TRACTION CONTROL SYSTEMCrash reported1 injured

GMC SUV - Hydroplaned -- could not achieve Traction Control despite moving away from water patch.. Front Angle Crashed into Concrete Median; All Side Airbags Deployed, No Front Airbags Deployed.

20250430Component: ENGINECrash reported

Engine failure had to replace the motor.

20250827Component: ENGINEFire reported

I was driving down the highway, and my wife and I decided to stop at Costco to get protein bars and gas for the drive home. We also had a [XXX] , [XXX] old, and [XXX] in the car. As we were approachi

20250827Component: SERVICE BRAKESFire reported

I was driving down the highway, and my wife and I decided to stop at Costco to get protein bars and gas for the drive home. We also had a [XXX] , [XXX] old, and [XXX] in the car. As we were approachi

Showing the 5 most serious of 55 complaints filed with NHTSA.

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