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1994 GMC G25/G2500 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!

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Get Full Access Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 1994 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!
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Using the Automotix DIY repair procedures will save you hundreds and even thousands of dollars! In addition, it will save you hours of touring the city searching for GMC mechanics you can trust. The Automotix DIY solution is particularly affordable. A full access to the entire DIY repair procedures and diagrams for your 1994 GMC G25/G2500 VAN vehicle will cost less than a single gallon of gas. Here are some of the DIY repair tips and procedures you will find here:

A/C & HEATER SERVICE PROCEDURES FOR 1994 GMC G25/G2500 VAN AUTOMOBILES

Component Replacement & Adjustment -> Light Duty Trucks & Vans -> CONDENSER, REPLACE -> ASTRO & SAFARI -> BRAVADA & S & T Series -> C & K SERIES -> G & P SERIES -> LUMINA APV, SILHOUETTE & TRANS SPORT
Vehicle: 1994 GMC G25/G2500 VAN Rally 6.5 V8 DIESEL

ASTRO & SAFARI

  • Disconnect battery ground cable.
  • Recover refrigerant from A/C system.
  • Remove grille and front end panel.
  • Disconnect radiator tie bar support at top.
  • Disconnect refrigerant lines from condenser, then cap lines and open fittings.
  • Remove condenser.
  • Reverse procedure to install.

C & K SERIES

  • Remove the battery ground cable.
  • Recover refrigerant from A/C system.
  • Remove grille assembly.
  • Remove condenser inlet and discharge lines, then cap all connections.
  • Remove the condenser to radia...

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BRAKE SERVICE PROCEDURES FOR 1994 GMC G25/G2500 VAN AUTOMOBILES

Power Brake Units -> Delco-Moraine Brake Boosters -> Description -> Operation -> Single Diaphragm Type -> Tandem (Dual) Diaphragm Type
Vehicle: 1994 GMC G25/G2500 VAN Vandura 5.0 V8 GAS

In order to properly service power brake systems, a thorough understanding of the various power assist systems is necessary. These systems provide a mechanical assist, acting to increase the force applied to the master cylinder piston by the driver while decreasing the effort necessary to obtain acceptable stopping performance. Two basic types of power assist mechanisms are used: vacuum assist diaphragm assemblies which use engine vacuum and in some cases vacuum from an external vacuum pump, and hydraulic assist assemblies which use hydraulic pressure developed by an external pump (...

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FUEL FILTER REPLACEMENT PROCEDURES FOR 1994 GMC G25/G2500 VAN AUTOMOBILES

General Motors Corp./Saturn Light Trucks, SUVs & Vans -> Component Locations -> C/K, G & R/V Series w/6.2L, 6.5L & 6.6L Diesel Engines
Vehicle: 1994 GMC G25/G2500 VAN Rally 6.5 V8 DIESEL

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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1994 GMC G25/G2500 VAN AUTOMOBILES

DRIVESHAFT, Replace -> One Piece Driveshaft -> Two Piece Driveshaft
Vehicle: 1994 GMC G25/G2500 VAN Rally 4.3 V6 GAS

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 1994 GMC G25/G2500 VAN AUTOMOBILES

Starter, Replace
Vehicle: 1994 GMC G25/G2500 VAN Vandura 5.0 V8 GAS

  • Disconnect battery ground cable.
  • Raise and support vehicle.
  • Remove starter to engine brace and heat shields, if equipped.
  • Remove starter motor mounting bolts and lower ...

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MAINTENANCE LAMP RESET PROCEDURES FOR 1994 GMC G25/G2500 VAN AUTOMOBILES

General Motors Corp./Saturn Trucks -> Traction Control System (TCS)/Electronic Stability Control (ESC) Warning Lamp ->
Vehicle: 1994 GMC G25/G2500 VAN Rally 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 t...

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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1994 GMC G25/G2500 VAN AUTOMOBILES

Radiator, Replace
Vehicle: 1994 GMC G25/G2500 VAN Vandura 4.3 V6 GAS

  • Drain coolant from radiator into a suitable container.
  • Remove upper fan shroud bolts and upper fan shroud.
  • Remove upper insulators and brackets.
  • Remove upper and lower radiator hoses.
  • Disconnect and plug transmission fluid cooler lines.
  • Disconnect and plug engine oil cooler lines.
  • Remove lower fan shroud r...

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SERPENTINE BELT SERVICE PROCEDURES FOR 1994 GMC G25/G2500 VAN AUTOMOBILES

Serpentine Drive Belt, Replace
Vehicle: 1994 GMC G25/G2500 VAN Vandura 4.3 V6 GAS

  • Rotate tensioner counterclockwise, using a 1/2 inch breaker bar with a socket placed on tensioner ...

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COMPONENT LOCATION DIAGRAMS FOR 1994 GMC G25/G2500 VAN AUTOMOBILES

Component location diagrams for most 1994 GMC G25/G2500 VAN cars and light trucks sold in the U.S. from 1990+.

Fuel Pump Relay & Cowl Wiring Diagram for 1994 GMC G25/G2500 VAN Vandura 5.0 V8 GASFuel Pump Relay & Cowl Wiring Diagram for 1994 GMC G25/G2500 VAN Vandura 5.0 V8 GAS

Components on diagram:
  • Fuel Pump Prime Connector
  • Fuel Pump Relay
  • Auxiliary Cooling Fan Relay
  • Connector C-100
  • Connector C-122
  • Components Locations Diagram for 1994 GMC G25/G2500 VAN Vandura 4.3 V6 GASComponents Locations Diagram for 1994 GMC G25/G2500 VAN Vandura 4.3 V6 GAS

    Components on diagram:
  • Data Link Connector
  • Vehicle Speed Sensor
  • Manifold Absolute Pressure Sensor
  • Oil Pressure Switch
  • Knock Sensor
  • CLICK HERE TO GET FULL ACCESS TO 1994 GMC G25/G2500 VAN PARTS/COMPONENTS LOCATION DIAGRAMS!

    WIRING DIAGRAMS FOR 1994 GMC G25/G2500 VAN AUTOMOBILES

    OEM drawn wiring diagrams for most 1994 GMC G25/G2500 VAN cars and light trucks sold in the U.S.

    1994 GMC G25/G2500 VAN Rally 4.3 V6 GAS Wiring Diagram1994 GMC G25/G2500 VAN Rally 4.3 V6 GAS Wiring Diagram

    Components on diagram:
  • Brake Warning Indicator
  • Park Brake Warning Switch
  • Flow Switch
  • Hydro-Boost Pressure Warning Switch
  • Brake Warning Alarm Buzzer
  • 1994 GMC G25/G2500 VAN Vandura 4.3 V6 GAS Wiring Diagram1994 GMC G25/G2500 VAN Vandura 4.3 V6 GAS Wiring Diagram

    Components on diagram:
  • Light Switch
  • Hi Beam Indicator
  • Headlamp Dimmer Switch
  • LH/RH HI/Lo Beam Headlamp Assembly
  • CLICK HERE TO GET FULL ACCESS TO 1994 GMC G25/G2500 VAN WIRING DIAGRAMS!

    TECHNICAL SERVICE BULLETINS FOR 1994 GMC G25/G2500 VAN AUTOMOBILES

    OEM TSB listings for most 1994 GMC G25/G2500 VAN cars and light trucks sold in the U.S. from 1985+.

    Document: Car and Truck Fix It Right the First Time Issues
    Vehicle: 1994 GMC G25/G2500 VAN Rally 4.3 V6 GAS

    Auto Systems:
  • Labor Times, Manuals, Warranty, Aids
  • Document: Bumps or Rust Colored Spots in Paint Due to Rail or Iron Dust
    Vehicle: 1994 GMC G25/G2500 VAN Rally 4.3 V6 GAS

    Auto Systems:
  • Finishes, Body Structure, Frame, Bumpers
  • CLICK HERE TO GET FULL ACCESS TO 1994 GMC G25/G2500 VAN TECHNICAL SERVICE BULLETINS!

    COMPONENT/PARTS SPECIFICATIONS FOR 1994 GMC G25/G2500 VAN AUTOMOBILES

    BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1994 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 1994 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 1994 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 1994 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

    CLICK HERE TO GET FULL ACCESS TO 1994 GMC G25/G2500 VAN SPECIFICATIONS DATA!

    Shop online for auto body parts, engines, wheels, lights...

    Click here to view more details1974 GMC G25/G2500 Van Shock Absorber and Strut Assembly, Front, Rear.

    Source: Auto Body Parts Store

    $105.99

    Click here to view more details about 1974 GMC G25/G2500 Van Mirror, Passenger Side1974 GMC G25/G2500 Van Mirror, Passenger Side, Non-folding; Below eyeline type; A high quality, OE replacement mirror; Backed by 2-year Kool Vue limited warranty..

    Source: Auto Body Parts Store

    $37.65

    Click here to view more details1979 GMC Pickup Fullsize C/K Radiator, Radiator; Aluminum; 3-Row; 28-1/4 X 17 X 1- 7/8, , .

    Source: Wheels / Rims, Mirrors & Lights Store

    $434.50

    Click here to view more details1974 GMC G25/G2500 Van Vandura L6, 4.1 L, 250 CID Rebuilt Engine, Without smog, three bolt starter, without integral intake manifold., Warranty: 3-Year/100,000 Mile, .

    Source: Rebuilt Engines Store

    $1,186.00

    Click here to view more details1992 GMC G25/G2500 VAN Used Headlight, Driver Side, single lamps, Very Good.

    Source: Used Auto Parts Store

    $85.00

    Click here to view more details1988 GMC G25/G2500 VAN Used Fan Clutch, 5.7, AUTO, 4X2 GAS, CKID, Very Good.

    Source: Used Auto Parts Store

    $70.00
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