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1993 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 1993 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!
    DIY REPAIR SAMPLES > CONTINUE EXPLORING >
    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 1993 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 1993 GMC G25/G2500 VAN AUTOMOBILES

    Manual Air Conditioning & Heater System Diagnosis & Testing -> Light Duty Trucks & Vans -> HEATER SYSTEM DIAGNOSIS & TESTING -> ASTRO, SAFARI, C, G, K, P, S & T SERIES -> Heater Functional Check -> Heater Functional Test -> Insufficient Heater Or Defrosting -> Insufficient Heating Or Defrosting -> LUMINA APV & TRANS SPORT -> TRACKER
    Vehicle: 1993 GMC G25/G2500 VAN Rally 4.3 V6 GAS

    ASTRO, SAFARI, C, G, K, P, S & T SERIES

    Heater Functional Test

    Before starting the functional test, the vehicle should be idling with coolant hot and thermostat open. Coolant temperature should be approximately 194°F.

    • Cycle the temperature lever to the extreme ends of travel in control assembly to ensure cable is properly adjusted.
    • Set mode lever to VENT position.
      • Air equal in temperature to outside air should be discharged from the instrument panel outlets.
      • Air should not blow from floor outlets, defroste...

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    BRAKE SERVICE PROCEDURES FOR 1993 GMC G25/G2500 VAN AUTOMOBILES

    Anti-lock Brakes -> Rear Wheel Anti-Lock Brake System -> Diagnosis & Testing -> 1992 -> 1993 S & T SERIES -> 1993-94 C & K SERIES & 1994 S & T SERIES -> 1993-95 -> 1995 S & T SERIES -> Accessing Diagnostic Trouble Codes -> C & K Series -> Clearing Diagnostic Trouble Codes -> Diagnostic Trouble Code Interpretation -> RWAL System -> S & T Series -> ZPRWAL System
    Vehicle: 1993 GMC G25/G2500 VAN Rally 6.2 V8 DIESEL

    Accessing Diagnostic Trouble Codes

    1992

    Diagnostic trouble codes can be accessed by connecting a TECH 1 or equivalent scan tool or by manually grounding the Assembly Line Diagnostic Link (ALDL) connector. To manually ground the ALDL connector, connect a jumper wire between terminals A and H, Fig. , and observe the flashes of the brake warning lamp. Note the following when performing the Diagnostic Circuit Check to access diagnostic trouble codes:

    • When terminals are jumped, count number of short flashes starting from initial long flash, include long flash in count.
    • The count se...

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    CLICK HERE TO GET FULL ACCESS TO 1993 GMC G25/G2500 VAN BRAKE SERVICE PROCEDURES

    FUEL FILTER REPLACEMENT PROCEDURES FOR 1993 GMC G25/G2500 VAN AUTOMOBILES

    General Motors Corp./Saturn Light Trucks, SUVs & Vans -> Fuel Filter Replacement -> 6.2L Diesel Engine
    Vehicle: 1993 GMC G25/G2500 VAN Vandura 6.2 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 1993 GMC G25/G2500 VAN AUTOMOBILES

    DRIVESHAFT U-JOINT, Replace -> Assemble -> Disassemble
    Vehicle: 1993 GMC G25/G2500 VAN Rally 6.2 V8 DIESEL

    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 1993 GMC G25/G2500 VAN AUTOMOBILES

    Starter, Replace
    Vehicle: 1993 GMC G25/G2500 VAN Rally 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 1993 GMC G25/G2500 VAN AUTOMOBILES

    General Motors Corp./Saturn Trucks -> Check Engine/Service Engine Soon Indicator Lamp -> Electronic Engine Controls Or Electronic Fuel Injection Except Tracker
    Vehicle: 1993 GMC G25/G2500 VAN Vandura 5.0 V8 GAS

    The Check Engine/Service Engine Soon Lamp should light when the ignition is turned On. When the engine is started, the lamp should go off. If the lamp remains on for 10 seconds or constantly after the engine is started, the self diagnosis system has detected a problem and has stored a code in the system Electronic Control Module (ECM) or Powertrain Control Module (PCM). After diagnosis and repair, the ECM/PCM memory can be cleared of codes either by using a scan tool (OBD II systems) or by disconnecting the battery ground ca...

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    RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1993 GMC G25/G2500 VAN AUTOMOBILES

    Radiator, Replace
    Vehicle: 1993 GMC G25/G2500 VAN Rally 5.7 V8 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 1993 GMC G25/G2500 VAN AUTOMOBILES

    Serpentine Drive Belt, Replace
    Vehicle: 1993 GMC G25/G2500 VAN Rally 4.3 V6 GAS

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

    CLICK HERE TO GET FULL ACCESS TO 1993 GMC G25/G2500 VAN SERPENTINE BELT SERVICE PROCEDURES

    COMPONENT LOCATION DIAGRAMS FOR 1993 GMC G25/G2500 VAN AUTOMOBILES

    Component location diagrams for most 1993 GMC G25/G2500 VAN cars and light trucks sold in the U.S. from 1990+.

    Transmission Components Diagram for 1993 GMC G25/G2500 VAN Vandura 5.0 V8 GASTransmission Components Diagram for 1993 GMC G25/G2500 VAN Vandura 5.0 V8 GAS

    Components on diagram:
  • Output Speed Sensor
  • Input Speed Sensor
  • Transmission
  • Connector C-318
  • Connector C-378
  • Engine Wiring to Shipping Panel Diagram for 1993 GMC G25/G2500 VAN Vandura 5.7 V8 GASEngine Wiring to Shipping Panel Diagram for 1993 GMC G25/G2500 VAN Vandura 5.7 V8 GAS

    Components on diagram:
  • Fuel Pump Relay
  • PCM
  • Connector C-100
  • Connector C-201
  • Connector C-250
  • CLICK HERE TO GET FULL ACCESS TO 1993 GMC G25/G2500 VAN PARTS/COMPONENTS LOCATION DIAGRAMS!

    WIRING DIAGRAMS FOR 1993 GMC G25/G2500 VAN AUTOMOBILES

    OEM drawn wiring diagrams for most 1993 GMC G25/G2500 VAN cars and light trucks sold in the U.S.

    1993 GMC G25/G2500 VAN Rally 6.2 V8 DIESEL Wiring Diagram1993 GMC G25/G2500 VAN Rally 6.2 V8 DIESEL Wiring Diagram

    Components on diagram:
  • Halogen Headlamps
  • 1993 GMC G25/G2500 VAN Rally 4.3 V6 GAS Wiring Diagram1993 GMC G25/G2500 VAN Rally 4.3 V6 GAS Wiring Diagram

    Components on diagram:
  • Turn Signal Switch
  • Hazard Flasher
  • Stoplamp Switch
  • LH Tail Stop And Turn Signal Lamp
  • RH Tail Stop And Turn Signal Lamp
  • CLICK HERE TO GET FULL ACCESS TO 1993 GMC G25/G2500 VAN WIRING DIAGRAMS!

    TECHNICAL SERVICE BULLETINS FOR 1993 GMC G25/G2500 VAN AUTOMOBILES

    OEM TSB listings for most 1993 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: 1993 GMC G25/G2500 VAN Rally 4.3 V6 GAS

    Auto Systems:
  • Labor Times, Manuals, Warranty, Aids
  • Document: Air Conditioning Odor
    Vehicle: 1993 GMC G25/G2500 VAN Rally 4.3 V6 GAS

    Symptoms:
  • Odors
  • Auto Systems:
  • Heating, A/C, Ventilation, Defogger
  • CLICK HERE TO GET FULL ACCESS TO 1993 GMC G25/G2500 VAN TECHNICAL SERVICE BULLETINS!

    COMPONENT/PARTS SPECIFICATIONS FOR 1993 GMC G25/G2500 VAN AUTOMOBILES

    BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1993 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 1993 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 1993 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 1993 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 1993 GMC G25/G2500 VAN SPECIFICATIONS DATA!

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

    Click here to view more details1969 GMC G25/G2500 Van Spark Plug, 14 mm thread size, 19 mm reach, 0.81 in. hex size, gasket seat, resistor, 1.016 mm non-adjustable gap size, copper core electrode material, nickel alloy electrode tip material, projected insulator type; Guaranteed to provide more power while using less fuel, quicker starts and less fouling than competitive standard spark plugs..

    Source: Auto Body Parts Store

    $5.95

    Click here to view more details1973 GMC G25/G2500 Van Ignition Switch, Blade type; 9-prong male terminal; A high quality, OE replacement ignition switch; With 2 years limited Trustbuilt warranty..

    Source: Auto Body Parts Store

    $22.59

    Click here to view more details2010 GMC Yukon Grille Overlay, CCI Grille Overlay; 1 Piece; Chrome Finish; ABS, , .

    Source: Wheels / Rims, Mirrors & Lights Store

    $208.50

    Click here to view more details1972 GMC G25/G2500 Van Vandura L6, 4.1 L, 250 CID Rebuilt Engine, Without smog, two hole starter mount., Warranty: 3-Year/100,000 Mile, .

    Source: Rebuilt Engines Store

    $1,186.00

    Click here to view more details1992 GMC G25/G2500 VAN Used A/C Compressor, 5.7, AUTO, RWD 8-350 (5.7L), Very Good.

    Source: Used Auto Parts Store

    $140.00

    Click here to view more details1993 GMC G25/G2500 VAN Used Condenser Assembly, 4.3, COL, RWD exc. 30 HD; exc. 8-454, Very Good.

    Source: Used Auto Parts Store

    $127.00
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