1985 Pontiac Grand Prix Service and Repair Manual

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Covers all 1985 Grand Prix trims — Brougham Coupe 2-Door, Base Coupe 2-Door, LE Coupe 2-Door ·
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1985 Pontiac Grand Prix 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

  • Brougham Coupe 2-Door
  • Base Coupe 2-Door
  • LE Coupe 2-Door

Engines covered

  • 5.0L 305Cu. In. V8 GAS OHV Naturally Aspirated
  • 3.8L 3800CC 231Cu. In. V6 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
NHTSA #87V04600003/04/1987Component: STRUCTURE:BODY:DOOR

DRIVERS SIDE POWER DOOR LOCK SWITCH MAY SEPARATE DURING ACTUATION, EXPOSING THE ELECTRICAL TERMINAL.

Consequence

THE TERMINAL MAY CONTACT THE STEEL REMOTE MIRROR CABLE,A SHORT CAN OCCUR WITHOUT BLOWING A FUSE. TH

Remedy

INSPECT AND MODIFY POWER DOOR LOCK SWITCH AS REQUIRED.

TSB #79671

UNKNOWN

19960226Component: SEATS:FRONT ASSEMBLY:HEAD RESTRAINTCrash reported1 injured

WHEN APPLYING BRAKES THE BACK OF THE FRONT SEAT FLIES UP,PUSHING YOU INTO THE DASH ON THE PASSENGER SIDE. *AK

19960814Component: ENGINE AND ENGINE COOLING:ENGINE:GASOLINEFire reported

ENGINE FIRE. (OHIO STATE POLICE REPORT)

19961021Component: POWER TRAIN:AUTOMATIC TRANSMISSION

THE TRANSMISSION WENT COMPLETELY OUT ON THE HIGHWAY . *AK

Showing the 3 most serious of 4 complaints filed with NHTSA.

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