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1991 Buick Regal CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Buick REPAIR SHOPS DON'T WANT YOU TO KNOW
Learn how to repair a car or truck, install or remove parts, wire an engine, reset warning lights, replace fuel filter, fix auto body and more. Get Automotix DIY!Select Section
- Component Locations
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- Technical Service Bulletins
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- A/C & Heater Service
- Brake Service
- Fuel Filter Replacement
- Driveline, U-Joint & CV Axles Replacement
- Starter & Alternator Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
- Serpentine Belt Service
Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 1991 Buick Regal car and truck
repair procedures including Buick engine diagrams, wiring diagrams, repair work estimating measures, technical service bulletins, auto body work
guidance, starter & alternator replacement procedures, serpentine belt replacement procedures, radiator & hose replacement procedures, tune-up &
drivability specifications, quick lube illustrations, preventive maintenance guide, engine light reset instructions, parts removal and install
procedures, fuel filter replacement directions, component location diagrams, air filter locations & replacement instructions, a/c
system specifications, and general auto service procedures. You don't have to be a car mechanic or technician to know how to fix
your Buick Regal automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 1991 Buick Regal AUTOMOBILES
A/C & Cooling System Maintenance -> General Motors Corp. -> 1990-2002 Buick Regal, Chevrolet Lumina & Monte Carlo, Oldsmobile Cutlass Supreme & Intrigue & Pontiac Grand Prix & 1997-2002 Buick Century & 2000-02 Impala
Vehicle: 1991 Buick Regal Custom 3.1 V6 GAS
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BRAKE SERVICE PROCEDURES FOR 1991 Buick Regal AUTOMOBILES
ANTI-LOCK BRAKES, GENERAL MOTORS -> Cutlass Supreme, Grand Prix & Regal (Delco-Moraine III Type) -> COMPONENT REPLACEMENT -> ACCUMULATOR, REPLACE -> ANTI-LOCK BRAKE CONTROLLER, REPLACE -> BLEEDER VALVES, REPLACE -> FLUID LEVEL SENSOR SWITCH, REPLACE -> FRONT WHEEL SPEED SENSORS, REPLACE -> MOTOR RELAY, REPLACE -> POWERMASTER III UNIT, REPLACE -> PRESSURE SWITCH, REPLACE -> PROPORTIONER VALVE ASSEMBLY, REPLACE -> RESERVOIR COVER, HOSE & RESERVOIR ASSEMBLY, REPLACE -> SOLENOID ASSEMBLIES, REPLACE -> TUBE & NUT ASSEMBLY (HIGH PRESSURE SIDE), REPLACE
Vehicle: 1991 Buick Regal Custom 3.1 V6 GAS
FLUID LEVEL SENSOR SWITCH, REPLACE
- Disconnect 2-pin connector (1), from fluid level sensor switch (2),Fig. .
- Remove fluid level sensor switch from reservoir.
- Depress locking tabs at inboard end of switch, under reservoir on opposite end of 2-pin connector.
- Reverse procedure to install. Ensure sensor switch locking tabs snap into place.
BLEEDER VALVES, REPLACE
- Depressurize Powermaster III, see "Depressurizing Powermaster III."
- Remove bleeder valves (4), Fig. . Clean valves in denatured alcohol, then dry with compressed air.Do not use lubricated compressed air.
- Reverse procedure to in...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 1991 Buick Regal AUTOMOBILES
General Motors Corp./Saturn Passenger Cars -> Fuel Filter Scheduled Maintenance -> 1980-06 Gasoline Engine Models Except Catera, LeMans (1988-93) Metro, Nova (1985-88), Saturn & Sprint -> Normal Service -> Severe Service
Vehicle: 1991 Buick Regal Custom 3.8 V6 GAS
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1991 Buick Regal AUTOMOBILES
CV AXLE SHAFT, Replace
Vehicle: 1991 Buick Regal Limited 3.8 V6 GAS
- Raise and support vehicle, then remove tire and wheel assembly.
- Remove brake caliper from steering knuckle and suspend caliper assembly.
- Remove four bolts holding hub/bearing assembly to knuckle.
- On vehicles equipped with Anti-Lock Brake System (ABS), remove ABS sensor mounting bolt, then position sensor aside to avoid damage.
- On vehicles equipped with 125C and HM-282 transaxles and right shaft of vehicles with 440-T4 transaxles, separate drive axle from transaxle using axle shaft remover tool No....
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1991 Buick Regal AUTOMOBILES
Starter, Replace
Vehicle: 1991 Buick Regal Limited 3.8 V6 GAS
- Disconnect battery ground cable.
- Remove righthand cooling fan.
- Remove drive belt.
- Remove A/C compressor upper support brace. Move compressor to side.
- Raise and support vehicle.
- Disconnect engine oil cooler lines at flex connector.
- Remove bolts from flywheel inspection cover and remove cover.
- Remove starter mou...
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MAINTENANCE LAMP RESET PROCEDURES FOR 1991 Buick Regal AUTOMOBILES
General Motors Corp./Saturn Cars -> Check Engine Or Service Now Soon Engine Indicator Lamps (Gasoline Engines w/Electronic Engine Controls Or EFI) -> Except LeMans, Metro, Prizm, Storm & Vibe
Vehicle: 1991 Buick Regal Custom 3.1 V6 GAS
The Check Engine lamp should light when the ignition is turned On. When the engine is started, the lamp should go off. If the lamp remains on for 10 seconds or constantly after the engine is started, the self diagnosis system has detected a fault condition and has stored a code in the system Electronic Control Module (ECM) or Powertrain Control Module (PCM). After diagnosis and repair, the ECM memory can be cleared of codes as follows:
On models except Cadillac with DEFI, remove the ECM/PCM fuse or disconnect the battery ground cable for approximately 30...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1991 Buick Regal AUTOMOBILES
Radiator, Replace
Vehicle: 1991 Buick Regal Limited 3.8 V6 GAS
- Disconnect battery ground cable.
- Drain engine coolant into a suitable container.
- Remove upper fan mounting bolts.
- Remove upper radiator panel.
- Remove coolant hoses from radiator and coolant recovery tank hose from radiator neck.
- Disconnect coolant fan electrical co...
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SERPENTINE BELT SERVICE PROCEDURES FOR 1991 Buick Regal AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 1991 Buick Regal Custom 3.8 V6 GAS
- On models equipped with airbag, disable airbag system.
- On all models, disconnect battery ground cable.
- Rotate tensioner counterclockwise using suitable tool to remove drive belt.
- Remove tensioner pulley attaching bolt, then remove pulley.
- Remove power steering pump from bracket and position aside.
- Loosen, but do not remove, alternator attaching bolts, then remove alter...
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COMPONENT LOCATION DIAGRAMS FOR 1991 Buick Regal AUTOMOBILES
Component location diagrams for most 1991 Buick Regal cars and light trucks sold in the U.S. from 1990+.
 Front Of Engine Compartment Diagram for 1991 Buick Regal Limited 3.1 V6 GASComponents on diagram: |
 Behind LH Side Of I/P Diagram for 1991 Buick Regal Custom 3.1 V6 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 1991 Buick Regal AUTOMOBILES
OEM drawn wiring diagrams for most 1991 Buick Regal cars and light trucks sold in the U.S.
 1991 Buick Regal Limited 3.1 V6 GAS Wiring DiagramComponents on diagram: |
 1991 Buick Regal Limited 3.8 V6 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1991 Buick Regal AUTOMOBILES
OEM TSB listings for most 1991 Buick Regal cars and light trucks sold in the U.S. from 1985+.
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Document: Car and Truck Fix It Right the First Time Issues Vehicle: 1991 Buick Regal Limited 3.8 V6 GAS Auto Systems: |
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Document: GM TIRE WARRANTY PROGRAM CLAIMS GOODWILL GUIDELINES - REVISED Vehicle: 1991 Buick Regal Limited 3.8 V6 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1991 Buick Regal AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1991 Buick Regal cars and light trucks sold in the U.S. and Canada from 1970+.
- Brake caliper mounting bolt torque
- Brake drum runout, machining, & discard specs
- Minimum brake lining thickness.
- Brake rotor runout, parallelism, machining, discard, & finish specs
A/C SYSTEM SPECIFICATIONS: Air conditioning refrigerant capacity and type as well as lubricant capacity for most 1991 Buick Regal cars and light trucks sold in the U.S. and Canada from 1980+.
- Refrigerant capacity & type, compressor oil viscosity, total system oil capacity & compressor clutch gap
COOLING SYSTEM BLEED: Cooling system bleeder valve identification, bleeder type and bleed procedures for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1986+.
PREVENTIVE MAINTENANCE: Preventive maintenance recommendations and required services for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1980+. Includes severe and routine service schedules
QUICK-LUBE and ILLUSTRATIONS: Fluid recommendations, capacities, drain plug torques, tire data, and severe service recommended preventive maintenance schedules. Information covers most 1991 Buick Regal cars and light trucks sold in the U.S. and Canada from 1980+. Engine and chassis service images.
- Automatic transmission/transaxles capacities, lubricant recommendations
- Differential/final drive capacities, lube recommendations, grades, & viscosities
- Final drive fill & drain plug torques
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Manual transmission/transaxle capacities, lube recommendations, grades, & viscosities
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Engine oil capacities, API grade recommendations, SAE viscosity recommendations, drain plug torque
- Severe service maintenance & interval recommendations
- Tire sizes, wheel nut/bolt torque, pressures & rim sizes
- Transfer case capacities, lube recommendations, grades, & viscosities
TUNE-UP & DRIVEABILITY SPECIFICATIONS: Most tune-up specifications for most 1991 Buick Regal cars and light trucks sold in the U.S. and Canada from 1980+
- Airflow sensor electrical specifications
- Tensioning specifications for systems with automatic tensioners
- Barometric pressure sensor specs
- Battery group number and cranking performance
- Crankshaft & camshaft position sensor resistance
- Engine compression pressures
- Coolant temperature sensor specs
- Computer advance.
- Diesel fuel temperature sensor resistance.
- Distributor advance specifications
- Ignition pickup coil resistance
- Exhaust gas recirculation temperature sensor resistance
- Engine fastener torque values
- Firing order diagrams
- Fuel system pressures
- Generator (alternator) specs
- Intake air temperature sensor specs
- Ignition coil specifications
- Fuel injector resistance
- Engine idle speeds
- Knock sensor resistance
- Manifold absolute pressure sensor specs
- Mixture control solenoid resistance
- Voltage regulator specs
- Spark plug applications & gaps
- Starter motor electrical specs.
- Tensioning specifications for systems without automatic tensioners
- Throttle body temperature sensor resistance
- Ignition timing in degrees at rpm
- Transmission oil temperature sensor resistance
- Throttle position sensor specs
- Vacuum sensor valve specs
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