2018 Chevrolet Suburban Service and Repair Manual

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Factory-Grade Data

2018 Chevrolet Suburban 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

  • HD Sport Utility 4-Door
  • Premier Sport Utility 4-Door
  • LS Sport Utility 4-Door
  • LT Sport Utility 4-Door

Engines covered

  • 6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated
  • 6.0L 5967CC 364Cu. In. V8 FLEX OHV Naturally Aspirated
  • 5.3L 5328CC 325Cu. In. V8 FLEX OHV Naturally Aspirated
  • 5.3L 5328CC 325Cu. 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

2018 Chevrolet Suburban Recalls & Complaints

NHTSA #19V76100024/10/2019Component: SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED

General Motors LLC (GM) is recalling certain 2015-2020 Chevrolet Suburban, Tahoe, and GMC Yukon, and 2014-2018 Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles equipped with a

Consequence

Unintended activation of the driveline-protection system will cause unintended braking on

Remedy

GM will notify owners, and dealers will reprogram the EBCM, free of charge. The recall be

NHTSA #26V28900007/05/2026Component: POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE)

General Motors, LLC (GM) is recalling certain 2026 Cadillac Escalade and Escalade ESV, Chevrolet Silverado 1500, Suburban, and Tahoe, and GMC Sierra 1500, Yukon, and Yukon XL vehic

Consequence

Front or rear wheel lockup increases the risk of a crash.

Remedy

Owners are advised not to drive their vehicle until the remedy is completed. Dealers will

NHTSA #19V64500006/09/2019Component: SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM

General Motors LLC (GM) is recalling certain 2015-2017 Cadillac Escalade, 2014-2018 Chevrolet Silverado, GMC Sierra, 2015-2018 Chevrolet Suburban, Tahoe, GMC Yukon vehicles. The a

Consequence

As the vacuum level drops, the brake assist decreases, increasing braking effort, extendin

Remedy

GM will notify owners, and dealers will reprogram the Electronic Brake Control Module, fre

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 #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 #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.

TSB #11027601

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

TSB #11026863

This Preliminary information communicates a diagnostic tip for an issue where the starter stays engaged after the engine starts. Dealers are to suspect/monitor the crankshaft position sensor.

Showing the 8 most recent of 1251 technical service bulletins on file with NHTSA.

20190701Component: AIR BAGSCrash reported2 injured

INVOLVED IN A SERIOUS FRONT END COLLISION AND AIRBAGS DID NOT DEPLOY. HIT BETWEEN FRONT WHEEL AND FRONT BUMPER. WAS LEAVING A STOP SIGN WHEN HIT. VEHICLE THAT HIT ME WAS GOING AT L

20180423Component: AIR BAGSCrash reported2 injured

TL* THE CONTACT OWNS A 2018 CHEVROLET SUBURBAN. WHILE DRIVING 75 MPH, A VEHICLE CRASHED INTO A GUARDRAIL AND BOUNCED BACK ONTO THE ROADWAY. AS A RESULT, THE CONTACT CRASHED INTO TH

20191205Component: POWER TRAINCrash reported

VEHICLE WAS PARKED AND ENGINE OFF AND KIDS WERE GETTING INTO CAR WHEN ONE OF THE KIDS PULLED IN THE SHIFTER AND SHIFTED THE VEHICLE INTO GEAR. THE VEHICLE BEGAN TO ROLL. THE SUBUR

20260515Component: POWER TRAIN

My husband was driving our 2018 Chevy Suburban when it suddenly stopped accelerating and he could no longer shift gears. Luckily, this happened while he was driving down a gravel

Showing the 4 most serious of 110 complaints filed with NHTSA.

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