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1998 GMC Jimmy CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT GMC 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 1998 GMC Jimmy AUTOMOBILES
Component Replacement & Adjustment -> Light Duty Trucks & Vans -> Control Assembly, Replace -> Astro, Bravada & Safari -> C & K Series -> G & P Series -> Montana, Silhouette, Trans Sport & Venture -> S & T Series
Vehicle: 1998 GMC Jimmy Envoy 4.3 V6 GAS
Astro, Bravada & Safari
- Set parking brake and move gear selector to the 1st gear position.
- Lower tilt steering column to its' lowest position.
- Grasp edges of instrument cluster trim plate and pull away from instrument panel.
- Remove accessory switches from cluster trim plate by releasing tabs located on sides of switches.
- Disconnect headlamp and accessories electrical connectors, then remove cluster trim plate.
- Remove control assembly retaining screw from lefthand side of control assembly.
- Disconnect electrical and vacuum conn...
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BRAKE SERVICE PROCEDURES FOR 1998 GMC Jimmy AUTOMOBILES
Anti-lock Brakes -> Kelsey-Hayes -> System Service -> 1997-2000 C & K Series Except 1999-2000 Sierra, Silverado & 2000 Suburban, Tahoe & Yukon -> 1997-2000 w/310 ABS -> 1999-2000 Sierra, Silverado & 2000 Suburban, Tahoe, Yukon & 2001 C & K Series -> 2000-01 w/325 ABS -> Astro & Safari -> Brake Pressure Modulator Valve (BPMV) -> Brake System Bleed -> C & K Series Except C3500HD -> C3500HD -> Component Replacement -> Electronic Brake Control Module (EBCM) -> Front Wheel Speed Sensor -> G Van -> Installation -> Manual Bleed -> P Series -> Pressure Bleed -> Removal -> S & T Series
Vehicle: 1998 GMC Jimmy 4.3 V6 GAS
Brake System Bleed
Gravity and vacuum bleeding procedures are not recommended for use with the anti-lock brake system. The manual bleed procedure is the preferred method, although pressure bleeding is also possible. Do not pump the brake pedal during the bleeding process, as fluid aeration may occur.
Manual Bleed
- Raise and support vehicle, then connect a clear plastic tube to brake bleed screw at righthand rear wheel.
- Place free end of tube in a glass jar partially filled with clean brake fluid. Ensure end of tube remains submerged in fluid and master cylinder reservoir is kept full.
- ...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 1998 GMC Jimmy AUTOMOBILES
General Motors Corp./Saturn Light Trucks, SUVs & Vans -> Fuel Filter Replacement -> Gasoline Engines Except Equinox, Montana SV6, Relay, Rendezvous w/3.6L Engine, Terraza, Uplander & Vue (2004-06) & 2004-06 Envoy, Rainier & TrailBlazer -> Returnless Fuel System
Vehicle: 1998 GMC Jimmy Envoy 4.3 V6 GAS
Returnless Fuel System
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. Pri...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1998 GMC Jimmy AUTOMOBILES
DRIVESHAFT U-JOINT, Replace -> Assemble -> Disassemble
Vehicle: 1998 GMC Jimmy 4.3 V6 GAS
Never clamp propeller shaft tubing in a vise. Clamping could dent or deform the tube causing an imbalance or unsafe condition. Always clamp on one of the yokes and support the shaft horizontally. Avoid damaging the slip yoke sealing surface. Nicks may damage the bushing or cut the lip seal.
Disassemble
- Support propeller shaft in a line horizontal with table of a press.
- Mark propeller shaft in order to show which end connects to transmission and which end goes to rear axle.
- On models equipped with external snap ring retainers, proceed as follows:
- Disassemble snap rings by ...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1998 GMC Jimmy AUTOMOBILES
Starter, Replace
Vehicle: 1998 GMC Jimmy Envoy 4.3 V6 GAS
Upon removal of starter, note if any shims are used. If shims are used, they should be installed in their original locations. After installation, if starter is noisy during cranking, remove one .015 inch double shim or add one .015 inch single shim to the outer bolt. If starter makes a high pitched whine after firing, add .015 inch double shims until noise ceases.
- Disconnect battery ground cable.
- R...
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MAINTENANCE LAMP RESET PROCEDURES FOR 1998 GMC Jimmy AUTOMOBILES
General Motors Corp./Saturn Trucks -> All Wheel Drive (AWD) System Warning Lamp ->
Vehicle: 1998 GMC Jimmy 4.3 V6 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 Jimmy AUTOMOBILES
Heater Hose, Replace -> Inlet -> Outlet
Vehicle: 1998 GMC Jimmy 4.3 V6 GAS
Inlet
- Drain cooling system into a suitable container.
- Reposition heater core inlet hose clamp at intake manifold fitting.
- Remove hose from intake manifold fitting.
- Reposition heater hose inlet clamp at heater core.
- Remove heater inlet hose from heater core.
- Remove hose from vehicle.
- Reverse proc...
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SERPENTINE BELT SERVICE PROCEDURES FOR 1998 GMC Jimmy AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 1998 GMC Jimmy 4.3 V6 GAS
- Remove belt tensioner pulley retaining bolt...
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COMPONENT LOCATION DIAGRAMS FOR 1998 GMC Jimmy AUTOMOBILES
Component location diagrams for most 1998 GMC Jimmy 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 1998 GMC Jimmy AUTOMOBILES
OEM drawn wiring diagrams for most 1998 GMC Jimmy cars and light trucks sold in the U.S.
![]() Components on diagram: |
![]() Components on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1998 GMC Jimmy AUTOMOBILES
OEM TSB listings for most 1998 GMC Jimmy cars and light trucks sold in the U.S. from 1985+.
Document: Revised General Motors New Vehicle Tire Warranty Program Vehicle: 1998 GMC Jimmy 4.3 V6 GAS Auto Systems: |
Document: New Website for AFIT, TPM, and VDR Updates Vehicle: 1998 GMC Jimmy 4.3 V6 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1998 GMC Jimmy AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1998 GMC Jimmy 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 Jimmy 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 Jimmy 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 Jimmy 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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