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1998 GMC G25/G2500 VAN 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 1998 GMC G25/G2500 VAN 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 G25/G2500 VAN automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 1998 GMC G25/G2500 VAN AUTOMOBILES
Compressor Service -> Application Chart -> Light Trucks & Vans
Vehicle: 1998 GMC G25/G2500 VAN 5.0 V8 GAS
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BRAKE SERVICE PROCEDURES FOR 1998 GMC G25/G2500 VAN AUTOMOBILES
Drum Brakes -> Precautions
Vehicle: 1998 GMC G25/G2500 VAN 6.5 V8 DIESEL
When working on or around brake assemblies, care must be taken to prevent breathing asbestos dust, as many manufacturers incorporate asbestos fibers in the production of brake linings. During routine service operations, the amount of asbestos dust from brake lining wear is at a low level because of a chemical breakdown during use and a few precautions will minimize exposure. Do not sand or grind brake linings unless suitable local exhaust ventilation equipment is used to prevent ...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 1998 GMC G25/G2500 VAN AUTOMOBILES
General Motors Corp./Saturn Light Trucks, SUVs & Vans -> Component Locations -> Late 1986-06 Chevrolet & GMC G Series w/Gasoline Engines
Vehicle: 1998 GMC G25/G2500 VAN 5.7 V8 GAS
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1998 GMC G25/G2500 VAN AUTOMOBILES
DRIVESHAFT, Replace -> One Piece Driveshaft -> Two Piece Driveshaft
Vehicle: 1998 GMC G25/G2500 VAN 6.5 V8 DIESEL
One Piece Driveshaft
- Raise and support vehicle.
- Mark rear universal joint to drive shaft flange.
- Remove retaining bolts and clamps.
- Remove propeller shaft from pinion drive flange.
- Remove propeller shaft from transmission/transfer case.
- Using tape or a rubber band, wrap the U-Joint bearing caps to ensure bearing caps do not separate from U-Joint.
- Reverse procedure to install, noting the following:
- Align reference marks made during removal.
- Torque yoke retainer bolts to 18 ft. lbs.
Two Piece Driveshaft
- Raise and support vehicle.
- Suppor...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1998 GMC G25/G2500 VAN AUTOMOBILES
Starter, Replace
Vehicle: 1998 GMC G25/G2500 VAN 5.7 V8 GAS
- Disconnect battery ground cable.
- Raise and support vehicle.
- Remove starter to engine brace and heat shields.
- Disconnect wires from solenoids.
- Remove starter motor mounting bolts, washers and lower starter. Record position of shims, if required.
- Remove starter motor from vehicle.
- Reverse procedure to install, notin...
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MAINTENANCE LAMP RESET PROCEDURES FOR 1998 GMC G25/G2500 VAN AUTOMOBILES
General Motors Corp./Saturn Trucks -> Low Coolant Lamp ->
Vehicle: 1998 GMC G25/G2500 VAN 4.3 V6 GAS
This lamp should light when engine coolant level in the radiator drops below a predetermined le...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1998 GMC G25/G2500 VAN AUTOMOBILES
Coolant Hose, Replace -> Lower -> Upper
Vehicle: 1998 GMC G25/G2500 VAN 5.0 V8 GAS
Lower
- Drain cooling system into a suitable container.
- Reposition hose clamp from radiator.
- Remove radiator outlet hose from radiator.
- Reposition hose clamp from water pump.
- Remove radiator outlet hose from water pump and from vehicle.
- Reverse procedure to in...
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SERPENTINE BELT SERVICE PROCEDURES FOR 1998 GMC G25/G2500 VAN AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 1998 GMC G25/G2500 VAN 5.7 V8 GAS
These engines use a single serpentine drive belt to drive all engine-mount accessories. All belt drive accessories are rigidly mounted with belt tension maintained by a spring loaded automatic tensioner.
- Rotate tensioner counterclockwise using suitable 1/2 inch break...
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COMPONENT LOCATION DIAGRAMS FOR 1998 GMC G25/G2500 VAN AUTOMOBILES
Component location diagrams for most 1998 GMC G25/G2500 VAN cars and light trucks sold in the U.S. from 1990+.
 Lower RH Side Of Engine Diagram for 1998 GMC G25/G2500 VAN 5.7 V8 GASComponents on diagram: |
 Below LH Side Of I/P Diagram for 1998 GMC G25/G2500 VAN 6.5 V8 DIESELComponents on diagram: |
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WIRING DIAGRAMS FOR 1998 GMC G25/G2500 VAN AUTOMOBILES
OEM drawn wiring diagrams for most 1998 GMC G25/G2500 VAN cars and light trucks sold in the U.S.
 1998 GMC G25/G2500 VAN 5.0 V8 GAS Wiring DiagramComponents on diagram: |
 1998 GMC G25/G2500 VAN 5.7 V8 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1998 GMC G25/G2500 VAN AUTOMOBILES
OEM TSB listings for most 1998 GMC G25/G2500 VAN cars and light trucks sold in the U.S. from 1985+.
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Document: Revised General Motors New Vehicle Tire Warranty Program Vehicle: 1998 GMC G25/G2500 VAN 5.7 V8 GAS Auto Systems: |
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Document: New Website for AFIT, TPM, and VDR Updates Vehicle: 1998 GMC G25/G2500 VAN 5.7 V8 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1998 GMC G25/G2500 VAN AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1998 GMC G25/G2500 VAN 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 1998 GMC G25/G2500 VAN 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 1998 GMC G25/G2500 VAN 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 1998 GMC G25/G2500 VAN 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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