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1990 GMC Safari CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT GMC REPAIR SHOPS DON'T WANT YOU TO KNOW
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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 1990 GMC Safari car and truck
repair procedures including GMC 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 GMC Safari automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 1990 GMC Safari AUTOMOBILES
A/C & Cooling System Maintenance -> General Motors Corp. -> 1990-2002 Chevrolet Astro & GMC Safari
Vehicle: 1990 GMC Safari 4.3 V6 GAS
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BRAKE SERVICE PROCEDURES FOR 1990 GMC Safari AUTOMOBILES
ANTI-LOCK BRAKES, GENERAL MOTORS -> Four Wheel Anti-Lock Brake System -> SYSTEM SERVICE -> BLEEDING EHCU MODULE
Vehicle: 1990 GMC Safari 4.3 V6 GAS
BLEEDING EHCU MODULE
The EHCU Module should be bled after replacement or if trapped air is in the unit. If bleeding is required the module must be bled thoroughly before the wheel cylinders and calipers.
There are two bleeders on top of the unit that appear to be normal bleeders, Fig. . These are modulator bleeders and must remain closed when the unit is not pressurized.
The internal bleeders are on either side of EHCU module. The valves are used to open the internal passages within the EHCU module. Both bleed valves must be rotated 1/4-1/2 a turn counterclockwise before beginning t...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 1990 GMC Safari AUTOMOBILES
General Motors Corp./Saturn Light Trucks, SUVs & Vans -> Component Locations -> 1985-05 Astro Van & Safari Van w/4.3L Fuel Injected Engine
Vehicle: 1990 GMC Safari XT 4.3 V6 GAS
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1990 GMC Safari AUTOMOBILES
DRIVESHAFT, Replace -> Front -> Rear
Vehicle: 1990 GMC Safari 4.3 V6 GAS
Front
The driveline components in this vehicle are factory system-balanced. System balance provides a smoother running driveline operation. Observe the position of all the driveline components. Accurately mark the relationship of the components before removal. These components include the propeller shafts, the drive axles, the pinion flanges, and the output shafts. All components must be reassembled in the exact relationship to each other as they were before removal. Follow the specifications, the torque values, and any measurements made prior to disassembly in order to maint...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1990 GMC Safari AUTOMOBILES
Alternator, Replace
Vehicle: 1990 GMC Safari XT 4.3 V6 GAS
- Disconnect battery ground cable.
- Remove air cleaner.
- Remove drive belt.
- Disconnect regulator electrical connector.
- Remove alternator front mounting bolts.
- Remove alternator rear mounting bolt.
- Remove alternat...
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MAINTENANCE LAMP RESET PROCEDURES FOR 1990 GMC Safari AUTOMOBILES
General Motors Corp./Saturn Trucks -> Reduce Engine Power Indicator Lamp ->
Vehicle: 1990 GMC Safari XT 4.3 V6 GAS
The Reduce Engine Power indicator lamp should light for a approximately 3 seconds when the ignition is turned On as a bulb check. If the warning lamp turns On during vehicle operation, a vehicl...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1990 GMC Safari AUTOMOBILES
Radiator, Replace
Vehicle: 1990 GMC Safari 4.3 V6 GAS
- Drain cooling system into a suitable container.
- Remove upper fan shroud.
- Remove radiator hose inlet.
- Remove radiator hose outlet.
- Remove transmission oil cooler lines.
- Remove engine oil cooler pipes.
- Remove overflow hose.
- Remove two radiator mounting bolts.
- Remov...
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SERPENTINE BELT SERVICE PROCEDURES FOR 1990 GMC Safari AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 1990 GMC Safari 4.3 V6 GAS
- Insert a 1/2 inch breaker bar into the tensioner pulley.
- Rotate tensioner counterclockwise, then remove drive belt.
- Route drive belt over all pulleys except ...
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COMPONENT LOCATION DIAGRAMS FOR 1990 GMC Safari AUTOMOBILES
Component location diagrams for most 1990 GMC Safari cars and light trucks sold in the U.S. from 1990+.
 RH Rear Of Transmission Diagram for 1990 GMC Safari 4.3 V6 GASComponents on diagram: |
 Front & Rear Door Components Diagram for 1990 GMC Safari 4.3 V6 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 1990 GMC Safari AUTOMOBILES
OEM drawn wiring diagrams for most 1990 GMC Safari cars and light trucks sold in the U.S.
 1990 GMC Safari XT 4.3 V6 GAS Wiring DiagramComponents on diagram: |
 1990 GMC Safari 4.3 V6 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1990 GMC Safari AUTOMOBILES
OEM TSB listings for most 1990 GMC Safari 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: 1990 GMC Safari 2.5 L4 GAS Auto Systems: |
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Document: GM TIRE WARRANTY PROGRAM CLAIMS GOODWILL GUIDELINES - REVISED Vehicle: 1990 GMC Safari 2.5 L4 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1990 GMC Safari AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1990 GMC Safari 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 1990 GMC Safari 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 1990 GMC Safari 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 1990 GMC Safari 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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