1990 Buick Reatta Service and Repair Manual

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Factory-Grade Data

1990 Buick Reatta 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.

Built for technicians and DIY owners, this manual helps you troubleshoot accurately, follow step-by-step repair procedures, and use wiring diagrams and system sections to diagnose problems faster.

What’s included

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

Trims covered

  • Base Convertible 2-Door
  • Base Coupe 2-Door

Engines covered

  • 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

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Vehicle Safety Data

1990 Buick Reatta Recalls & Complaints

NHTSA #90E04300430/10/1990Component: AIR BAGS:FRONTAL

THREADED INFLATOR COMPONENTS MAY HAVE BEEN DAMAGED DURING ASSEMBLY WHICH MAY ALLOW COMPONENTS TO SEPARATE WHEN INFLATOR RECEIVES A SIGNAL TO DEPLOY THE AIR BAG.

Consequence

INFLATOR COMPONENT SEPARATION ALLOWS HOT COMBUSTION GASESTO ESCAPE INTO THE PASSENGER COMPARTMENT WH

Remedy

REPLACE AIR BAG MODULES CONTAINING POTENTIALLY DEFECTIVE INFLATORS.

NHTSA #91V15800013/09/1991Component: SERVICE BRAKES, HYDRAULIC:BRAKE FLUID LOW WARNING: LAMP

BRAKE INDICATOR LIGHT MAY NOT LIGHT WHEN IGNITION IS IN THE "ON" POSITION, THE PARKING BRAKE IS APPLIED, AND THE SHIFT SELECTOR IS IN THE PARK OR NEUTRAL GEAR RANGE.

Consequence

VEHICLES WOULD NOT MEET THE REQUIREMENTS OF FMVSS 101AND 105.

Remedy

REPLACE THE PROM IN THE BODY COMPUTER MODULE TO PREVENT THIS CONDITION FROM OCCURRING.

NHTSA #90V03100012/02/1990Component: AIR BAGS:FRONTAL:SENSOR/CONTROL MODULE-INACTIVE

THE FORWARD SENSOR FOR THE AIR BAG MAY HAVE BEEN INCORRECTLY CONSTRUCTED WITH PART OF THE WIRING HARNESS TO THE SENSOR REVERSED.

Consequence

THE REVERSAL OF THE WIRES COULD CAUSE DELAY IN THE DEPLOYMENT OF THE AIR BAG AND INCREASE THE SEVERI

Remedy

REPLACE FORWARD DISCRIMINATING SENSOR AS NECESSARY.

NHTSA #90V16400006/09/1990Component: POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:FLOOR SHIFT

TRANSAXLE SHIFT CONTROL CABLE MAY DISENGAGE FROM THE FROM THE FLOOR SHIFT CONTROL WITH LOSS OF GEAR INDICATOR REFERENCE AND SHIFT SELECTOR OPERATION.

Consequence

DRIVER WOULD NOT BE ABLE TO DETERMINE ACTUAL GEARPOSITION THE TRANSAXLE IS IN, WHICH COULD RESULT IN

Remedy

INSTALL A TRANSAXLE SHIFT CONTROL CABLE RETAINING CLIP TO PREVENT CABLE DISENGAGEMENT.

TSB #10246631

Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules

20001008Component: SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITEDCrash reported

INTERMITANT FAILURES WHERE ABS WOULD EITHER ENGAGE OR WHEELS WOULD LOCK AND/OR THE CAR WOULD LUNGE LEFT OR RIGHT. IN 10 MONTHS NUMEROUS DEALERSHIPS WERE NEVER ABLE TO DIAGNOSE THE PROBLEMS, ALWAYS SA

19990825Component: AIR BAGS:FRONTALCrash reported

WHILE TRAVELING AT 30 TO 40 MPH A VEHICLE JUMP LANES IN FRONT OF THE REATTA. REATTA, IN TURN, STRUCK ANOTHER VEHICLE IN THE REAR THAT CAUSED ABOUT $8000 IN DAMAGES. UPON IMPACT, THE DRIVER'S SIDE A

19971209Component: SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITEDCrash reported

WHILE DRIVING AT 45-50 MPH THE DEFECTIVE BRAKING SYSTEM CAUSED THE BRAKE PEDAL TO BE HARD, AND ONE WHEEL LOCKED UP, CAUSING AN ACCIDENT. *AK

20200320Component: SERVICE BRAKES

WE HAVE HAD THE CAR OVER 10 YEARS AND IT HAD A HARD PEDAL WHEN YOU FIRST START IT UP THEN AS WE USE THE BRAKES THEY WORK BETTER

20070427Component: SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED

COMPLETE FAILURE OF ANTI BRAKE SYSTEM ON MY 1990 BUICK REATTA ALSO-- AS SPECIFICALLY REPORTED FROM OTHER REATTA OWNERS. DEALER STATES THERE ARE PROBLEMS --- REATTA INTERNET SITES STATES THERE ARE MAJO

Showing the 5 most serious of 30 complaints filed with NHTSA.

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