1988 Mitsubishi Galant Service and Repair Manual

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Fits the 1988 Galant — Sigma Sedan 4-Door ·
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1988 Mitsubishi Galant 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 diagnose issues correctly, follow proven repair steps, and use wiring diagrams and system sections to track faults faster.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Electrical diagnostics with wiring diagrams
  • Coverage across major systems: engine, transmission/driveline, brakes, steering, suspension, HVAC, and more

Trims covered

  • Sigma Sedan 4-Door

Engines covered

  • 3.0L 2972CC 181Cu. In. V6 GAS SOHC 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
No active recalls The 1988 Mitsubishi Galant has no recalls on file with NHTSA.
TSB #10170852

This Technical Service Bulletin updates the door adjustment procedure in the Body Section of the applicable service manuals.

TSB #52633

VALVE LASH ADJUSTER PROCEDURES - SERVICE MANUAL REVISION. *TW

TSB #50618

ANTENNA TIGHTENING TORQUE. *TW

19960625Component: SEATS:FRONT ASSEMBLY:RECLINER

FAILURE ON THE FRONT PASSENGER SIDE SEAT WHEN DRIVING THE SEAT MOVES. *AK

19960515Component: STEERING:HYDRAULIC POWER ASSIST SYSTEM

POWER STEERING FAILED.

19960426Component: SEAT BELTS:FRONT:BUCKLE ASSEMBLY

BUCKLE UNLATCHES AFTER LATCHING. DEALER MADE FOUR ATTEMPTS TO FIX. *AK

19951020Component: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM

PROBLEMS WITH THE OIL AND EXHAUST SYSTEM LEAKING OIL REPLACED TRANSMISSION. TT

19950425Component: SEAT BELTS:FRONT:BUCKLE ASSEMBLY

DRIVERS SIDE SEAT BELT BUCKLE BROKE, CAN'T LOCK IT, THERE IS A PIECE OF PLASTIC INSIDE. TT

Showing the 5 most serious of 7 complaints filed with NHTSA.

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