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1991 Cadillac Deville CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Cadillac REPAIR SHOPS DON'T WANT YOU TO KNOW
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- Component Locations
- Wiring Diagrams
- Technical Service Bulletins
- Specifications
- 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

A/C & HEATER SERVICE PROCEDURES FOR 1991 Cadillac Deville AUTOMOBILES
A/C & Cooling System Maintenance -> General Motors Corp. -> Allante & 1990-92 Fleetwood & 1990-2002 Cadillac DeVille, Eldorado & Seville
Vehicle: 1991 Cadillac Deville 4.9 V8 GAS
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BRAKE SERVICE PROCEDURES FOR 1991 Cadillac Deville AUTOMOBILES
ANTI-LOCK BRAKES, GENERAL MOTORS -> 1991 Bonneville, DeVille, Eighty Eight, Fleetwood, LeSabre, Ninety Eight & Park Avenue (Treves Type) -> DIAGNOSIS & TESTING -> ABS System Self-Diagnosis Description -> Anti-Lock Warning Lamp -> DESCRIPTION -> DIAGNOSTIC PROCEDURES -> History & Current ABS Codes -> Note On Intermittents -> WIRING DIAGRAMS
Vehicle: 1991 Cadillac Deville Touring 4.9 V8 GAS
DESCRIPTION
Anti-Lock Warning Lamp
The amber Anti-lock warning lamp is located in the instrument panel cluster. This lamp will illuminate when the EBCM detects a malfunction in the anti-lock brake system. The warning lamp is intended only to warn the driver that a condition has been detected which results in partial or total reduction of the anti-lock brake system. Under this condition full operation of the standard hydraulic braking system is available. If both the red Brake and the amber Anti-Lock brake lights are illuminated, there may be something wrong with the hydraulic ...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 1991 Cadillac Deville AUTOMOBILES
General Motors Corp./Saturn Passenger Cars -> Fuel Pressure Relief -> Except Aveo, LaCrosse, LeMans (1988-93), Malibu & Malibu Maxx (2004-05), Metro, Nova, Prizm, Spectrum & Storm -> Engine Fuel Pressure Service Port -> Engines Less Fuel Pressure Service Port
Vehicle: 1991 Cadillac Deville 4.9 V8 GAS
Do not smoke or allow an open flame of any type when working on or near any fuel system related components. The highly flammable vapor mixtures may ignite, resulting in serious personal injury.
Prior to disconnecting fuel lines, the fuel system pressure must be relieved to prevent accidental spray of fuel.
After the battery has been disconnected and reconnected, some abnormal driveability symptoms may occur. The vehicle may need to be driven while the vehicle relearns its adaptive strateg...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1991 Cadillac Deville AUTOMOBILES
CV AXLE SHAFT, Replace
Vehicle: 1991 Cadillac Deville 4.9 V8 GAS
- Raise and support vehicle, then remove tire and wheel assembly.
- Install a brass drift or a screwdriver to prevent rotor from turning.
- Remove shaft nut and washer.
- Remove lower ball joint cotter and nut, then loosen ball joint using ball joint separator tool No. J-29330. If removing right axle, turn wheel to left, if removing left axle, turn wheel to right.
- Separate joint by using a pry bar between suspension support and lower control arm.
- Pull out on lower knuckle area and with a plasti...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1991 Cadillac Deville AUTOMOBILES
Alternator, Replace
Vehicle: 1991 Cadillac Deville Touring 4.9 V8 GAS
- Disconnect battery ground cable.
- Remove accessory drive belt.
- Remove upper front bolt.
- Remove radiator.
- Raise and suitably support vehicle.
- Remove front engine splash shield.
- Loosen rear alternator bracket from engine.
- Remove top bolt.
- Remove front lower mounting bolt.
- Remove lower rear mounting bolt.
- Remove upper rear mounting bolt.
- Remove duct from back of alternator.
- Disconnect regulator electrical connectio...
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MAINTENANCE LAMP RESET PROCEDURES FOR 1991 Cadillac Deville AUTOMOBILES
General Motors Corp./Saturn Cars -> Low Washer Fluid Indicator ->
Vehicle: 1991 Cadillac Deville Touring 4.9 V8 GAS
The windshield washer solvent tank has a switch that closes when the wash...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1991 Cadillac Deville AUTOMOBILES
Radiator, Replace
Vehicle: 1991 Cadillac Deville Touring 4.9 V8 GAS
- Disconnect battery ground cable from battery.
- Drain coolant into a suitable container.
- Remove left and right cooling fans.
- Remove coolant reservoir hose from radiator filler neck.
- Remove upper radiator hose.
- Remove engine oil cooler lines from radiator.
- Remove transaxle oi...
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SERPENTINE BELT SERVICE PROCEDURES FOR 1991 Cadillac Deville AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 1991 Cadillac Deville Touring 4.9 V8 GAS
- Disable airbag system.
- Rotate belt tensioner upward from drive bel...
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COMPONENT LOCATION DIAGRAMS FOR 1991 Cadillac Deville AUTOMOBILES
Component location diagrams for most 1991 Cadillac Deville cars and light trucks sold in the U.S. from 1990+.
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![]() Components on diagram: |
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WIRING DIAGRAMS FOR 1991 Cadillac Deville AUTOMOBILES
OEM drawn wiring diagrams for most 1991 Cadillac Deville cars and light trucks sold in the U.S.
![]() Components on diagram: |
![]() Components on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1991 Cadillac Deville AUTOMOBILES
OEM TSB listings for most 1991 Cadillac Deville cars and light trucks sold in the U.S. from 1985+.
Document: Car and Truck Fix It Right the First Time Issues Vehicle: 1991 Cadillac Deville 4.9 V8 GAS Auto Systems: |
Document: GM TIRE WARRANTY PROGRAM CLAIMS GOODWILL GUIDELINES - REVISED Vehicle: 1991 Cadillac Deville 4.9 V8 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1991 Cadillac Deville AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1991 Cadillac Deville 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 Cadillac Deville 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 Cadillac Deville 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 Cadillac Deville 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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