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1998 GMC G35/G3500 VAN CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT GMC 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
- 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
Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 1998 GMC G35/G3500 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 G35/G3500 VAN automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 1998 GMC G35/G3500 VAN AUTOMOBILES
Component Replacement & Adjustment -> Light Duty Trucks & Vans -> Condenser, Replace -> Astro & Safari -> Bravada, S & T Series -> C & K Series -> G Series -> Montana, Silhouette, Trans Sport & Venture -> P Series -> Tracker
Vehicle: 1998 GMC G35/G3500 VAN 6.5 V8 DIESEL
Astro & Safari
- Recover refrigerant as outlined under .
- Remove grille and front end panel.
- Disconnect radiator tie bar support at top.
- Disconnect refrigerant lines from condenser. Cap lines and fittings to prevent dirt or moisture from entering system.
- Remove condenser.
- Reverse procedure to install.
C & K Series
- Recover refrigerant as outlined under .
- Remove grille assembly.
- Remove condenser inlet and discharge lines. Cap lines and fittings to prevent dirt or moisture from entering system.
- Remove condenser ...
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BRAKE SERVICE PROCEDURES FOR 1998 GMC G35/G3500 VAN AUTOMOBILES
Power Brake Units -> Delco Brake Booster -> Troubleshooting -> Brakes Grab -> Hard Pedal -> Slow Or No Release
Vehicle: 1998 GMC G35/G3500 VAN 7.4 V8 GAS
Hard Pedal
- Internal vacuum leak.
- Faulty control valve.
- Broken or damaged hydraulic brake lines.
- Collapsed or damaged vacuum hose.
- Plugged or loose vacuum fitting.
- Bad stud welds on front or rear housing on power head.
- Faulty booster diaphragm.
- Restricted air filter element.
- Worn or distorted reaction plate or levers.
- Cracked or broken pow...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 1998 GMC G35/G3500 VAN AUTOMOBILES
General Motors Corp./Saturn Light Trucks, SUVs & Vans -> Fuel Filter Replacement -> 6.5L Diesel Engine
Vehicle: 1998 GMC G35/G3500 VAN 6.5 V8 DIESEL
On models equipped with fuel injected engines, relieve fuel system pressure as outlined under "Fuel System Pressure Relief."
On models equipped with metal collar quick disconnect connectors, GM tool No. J37088-A, or equivalent, will be required to disconnect the connector. Prior to reconnecting the connector, apply a few drops of clean motor oil to the male pipe ends.
On models equipped with plastic collar quick disconnect connectors, squeeze the connector plastic retainer release tabs to release the connector. Prior to reconnecting the connector, apply a few drops of clean motor...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1998 GMC G35/G3500 VAN AUTOMOBILES
DRIVESHAFT, Replace -> One Piece Driveshaft -> Two Piece Driveshaft
Vehicle: 1998 GMC G35/G3500 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 G35/G3500 VAN AUTOMOBILES
Starter, Replace
Vehicle: 1998 GMC G35/G3500 VAN 7.4 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 G35/G3500 VAN AUTOMOBILES
General Motors Corp./Saturn Trucks -> All Wheel Drive (AWD) System Warning Lamp ->
Vehicle: 1998 GMC G35/G3500 VAN 5.7 V8 GAS
This lamp should light for a approximately 6-8 seconds when the ignition is turned On as a bulb check. If the war...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1998 GMC G35/G3500 VAN AUTOMOBILES
Heater Hose, Replace -> Bypass -> Inlet -> Outlet
Vehicle: 1998 GMC G35/G3500 VAN 5.7 V8 GAS
Inlet
- Drain cooling system into a suitable container.
- Reposition heater core inlet hose clamp at thermostat housing.
- Remove hose from thermostat housing.
- Reposition heater hose inlet clamp at heater core.
- Remove heater inlet hose from heater core.
- Remove hose from vehicle.
- Reverse procedure to install.
Outlet
- Drain cooling system into a suitable container.
- Reposition heater hose outlet clamp at heater core.
- Disconnect heater outlet hose ...
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SERPENTINE BELT SERVICE PROCEDURES FOR 1998 GMC G35/G3500 VAN AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 1998 GMC G35/G3500 VAN 6.5 V8 DIESEL
- Rotate tensioner arm counterclockwise using 3/8 inch breaker bar.
- Remove belt from pulleys.
- Route new belt over all pulleys except tensioner arm.
- Rotate tensioner arm co...
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COMPONENT LOCATION DIAGRAMS FOR 1998 GMC G35/G3500 VAN AUTOMOBILES
Component location diagrams for most 1998 GMC G35/G3500 VAN cars and light trucks sold in the U.S. from 1990+.
 LH Frame Rail Diagram for 1998 GMC G35/G3500 VAN 5.7 V8 GASComponents on diagram: |
 Behind Center Of I/P Diagram for 1998 GMC G35/G3500 VAN 7.4 V8 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 1998 GMC G35/G3500 VAN AUTOMOBILES
OEM drawn wiring diagrams for most 1998 GMC G35/G3500 VAN cars and light trucks sold in the U.S.
 1998 GMC G35/G3500 VAN 7.4 V8 GAS Wiring DiagramComponents on diagram: |
 1998 GMC G35/G3500 VAN 6.5 V8 DIESEL Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1998 GMC G35/G3500 VAN AUTOMOBILES
OEM TSB listings for most 1998 GMC G35/G3500 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 G35/G3500 VAN 5.7 V8 GAS Auto Systems: |
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Document: New Website for AFIT, TPM, and VDR Updates Vehicle: 1998 GMC G35/G3500 VAN 5.7 V8 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1998 GMC G35/G3500 VAN AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1998 GMC G35/G3500 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 G35/G3500 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 G35/G3500 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 G35/G3500 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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