2020 Chevrolet Blazer Service and Repair Manual

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Factory-Grade Data

2020 Chevrolet Blazer 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

  • L Sport Utility 4-Door
  • RS Sport Utility 4-Door
  • True North Sport Utility 4-Door
  • Premier Sport Utility 4-Door
  • Base Sport Utility 4-Door
  • LS Sport Utility 4-Door
  • LT Sport Utility 4-Door

Engines covered

  • 2.5L 2457CC 153Cu. In. l4 GAS DOHC Naturally Aspirated
  • 3.6L 222Cu. In. V6 GAS DOHC Naturally Aspirated
  • 2.0L 1998CC 122Cu. In. l4 GAS DOHC Turbocharged

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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Payment methods

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  • Google Pay
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  • PayPal
  • Union Pay
  • Visa

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Vehicle Safety Data

2020 Chevrolet Blazer Recalls & Complaints

NHTSA #20V44600030/07/2020Component: AIR BAGS:SIDE/WINDOW:CURTAIN:INFLATOR

General Motors, LLC. (GM) is recalling certain 2020 Buick Enclave, Cadillac XT5 and XT6, Chevrolet Blazer, Silverado 1500, 2500 and 3500 and Traverse and GMC Acadia and Sierra 1500

Consequence

If the diffuser separates from the inflator during deployment, RRAB performance may be deg

Remedy

GM will notify owners, and dealers will replace the suspect RRAB modules, free of charge.

NHTSA #20V66800029/10/2020Component: POWER TRAIN:AUTOMATIC TRANSMISSION

General Motors LLC (GM) is recalling certain 2018-2019 Chevrolet Cruze and Buick LaCrosse, 2018-2020 Chevrolet Equinox, Chevrolet Traverse and GMC Terrain, 2018 Chevrolet Malibu, 2

Consequence

Missing bolts on the start-stop accumulator endcap could result in a transmission oil leak

Remedy

GM will notify owners, and dealers will inspect the start-stop transmission accumulator an

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 Chev

Consequence

Over cured tires may develop a break in the sidewall resulting in sudden air loss or a bel

Remedy

GM will notify owners, and dealers will inspect the tires, replacing them as necessary, fr

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 #11028658

This Preliminary information communicates the potential for condensation to freeze up inside the Crankcase Pressure Sensor causing dtc P04FB to set.

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 #11027617

This Preliminary information communicates the potential for condensation to freeze up inside the Crankcase Pressure Sensor causing dtc P04FB to set.

Showing the 8 most recent of 852 technical service bulletins on file with NHTSA.

20240705Component: UNKNOWN OR OTHERCrash reported2 injured

6/12/2024 In Damon Parking lot in Rochester MN. Going less than 10 miles an hr- cars in front of me and behind me looking for a parking spot. Stop and go at times. Went to turn co

20240705Component: ENGINECrash reported2 injured

6/12/2024 In Damon Parking lot in Rochester MN. Going less than 10 miles an hr- cars in front of me and behind me looking for a parking spot. Stop and go at times. Went to turn co

20240705Component: FUEL/PROPULSION SYSTEMCrash reported2 injured

6/12/2024 In Damon Parking lot in Rochester MN. Going less than 10 miles an hr- cars in front of me and behind me looking for a parking spot. Stop and go at times. Went to turn co

20251101Component: AIR BAGSCrash reported1 injured

Accident going about 50 mph and no airbags deployed

Showing the 4 most serious of 322 complaints filed with NHTSA.

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