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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!
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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 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

Computer Relearn Procedures -> General Motors Corp. -> 1997-98 -> 1998-2000 -> 1998-99 -> 1999-2001 -> 1999-2002 -> 2.2L & 2.4L Engines -> 2000-02 -> 2000-04 -> 2001-02 -> 2001-04 -> 3.1L, 3.4L, 3800/3.8L, 4.0L & 4.6L Engines -> 3.5L Engine -> 5.7L Engine -> Achieva, Alero, Grand Am & Skylark -> Achieva, Cavalier, Skylark & Sunfire -> Alero & Grand Am -> Alero & Malibu -> Aurora -> Aurora, Bonneville, DeVille, LeSabre & Seville -> Aurora, Bonneville, Grand Prix, LeSabre & Park Avenue -> Auto Learn Passlock Procedure -> Body Control Module (BCM) -> Bonneville -> Bonneville, Eighty Eight, LeSabre, LSS & Park Avenue -> C & K Series w/Diesel Engine -> C & K Trucks w/Diesel Engine -> Camaro & Firebird -> Catera -> Cavalier & Sunfire -> Century -> Century, Grand Prix, Impala, Intrigue, Lumina, Monte Carlo & Regal -> Century, Impala, Intrigue, Monte Carlo & Regal -> Corvette -> Crankshaft Position System Variation Learn -> Cutlass & Malibu -> Dash Integration Module (DIM) -> DeVille -> DeVille, Eldorado & Seville -> EEPROM -> Eldorado -> Engine Control Module (ECM) -> Engine Performance -> Except Park Avenue -> Grand Am -> Grand Prix & Regal -> Impala & Monte Carlo -> Instrument Panel Integration Module (IPM) -> Intrigue -> LeSabre -> Less Tech 2 Or Techline Terminal -> Light Truck & Vans -> Park Avenue -> Passenger Cars -> Passkey Module -> Passlock Learn Procedure -> PCM -> Powertrain Control Module (PCM) -> Powertrain Control Module (PCM) & Vehicle Control Module (VCM) -> Rear Integration Module -> Riviera -> Seville -> T50/T60/T20+ -> TDC Offset Adjustment -> Theft Deterrent System Programming -> VCM -> With Tech 2 -> With Techline Terminal & Scan Tool
Vehicle: 1993 GMC G25/G2500 VAN Rally 6.2 V8 DIESEL

Passenger Cars

Body Control Module (BCM)
Alero & Grand Am

This procedure must be performed if the BCM, Passlock sensor or PCM is replaced. If BCM is not properly programmed, it will not control all the features properly.

  • Ensure battery is fully charged and ignition switch is in the ON position.
  • Connect a suitably programmed Tech II, or equivalent, scan tool to Data Link Connector (DLC).
  • Access scan tool "Special Functions" menu and follow scan tool instructions to program BCM.
  • If BCM fails to accept the pr...

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BRAKE SERVICE PROCEDURES FOR 1993 GMC G25/G2500 VAN AUTOMOBILES

Power Brake Units -> Delco-Moraine Brake Boosters -> General Service
Vehicle: 1993 GMC G25/G2500 VAN Rally 5.0 V8 GAS

Certain general service procedures apply, regardless of whether the brakes are vacuum or hydraulically assisted. Only top quality, clean brake fluid should be used. More seals and valves are used with power brake systems than with ordinary brakes, so an inferior brake fluid will do much more damage. For the same reason, be sure all dirt is kept out of the system. Additionally, on models with hydraulic assist brakes, care must be taken not to mix the fluids of the booster hydraulic system and brake hydraulic system as the fluids are not compatible.

If the power unit fails, the bra...

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

General Motors Corp./Saturn Light Trucks, SUVs & Vans -> Fuel Pressure Relief -> Except Montana SV6, Relay, Rendezvous w/3.6L Engine, Terraza, Tracker & Uplander -> Engine Fuel Pressure Service Port -> Engines Less Fuel Pressure Service Port
Vehicle: 1993 GMC G25/G2500 VAN Rally 4.3 V6 GAS

Do not smoke or allow an open flame of any type when working on or near any fuel system related components. The highly flammable vapor mixtures may ignite, resulting in serious personal injury.

Prior to disconnecting fuel lines, the fuel system pressure must be relieved to prevent accidental spray of fuel.

After the battery has been disconnected and reconnected, some abnormal driveability symptoms may occur. The vehicle may need to be driven while the vehicle relearns its adaptive strategy.

Engines Less Fuel Pressure ...

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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

Alternator, Replace
Vehicle: 1993 GMC G25/G2500 VAN Rally 6.2 V8 DIESEL

  • Disconnect battery ground cable.
  • Disconnect terminal plug and battery lead from rear of alternator.
  • Remove accessory drive belt.
  • Remove alternator mounting bolts.
  • Separate alternator from mount...

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MAINTENANCE LAMP RESET PROCEDURES FOR 1993 GMC G25/G2500 VAN AUTOMOBILES

General Motors Corp./Saturn Trucks -> Change Trans Fluid Indicator ->
Vehicle: 1993 GMC G25/G2500 VAN Rally 5.0 V8 GAS

This message will appear on the DIC (Driver Information Center) when it is time to change the transmission fluid....

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

Heater Hose, Replace -> Bypass -> Inlet -> Outlet
Vehicle: 1993 GMC G25/G2500 VAN Vandura 4.3 V6 GAS

Inlet

  • Remove air cleaner.
  • Drain cooling system into a suitable container.
  • Remove heater hose support clamp bolt.
  • Reposition heater core inlet hose clamp at engine.
  • Remove hose from engine.
  • Reposition heater hose inlet clamp at heater core.
  • Remove heater inlet hose from heater core.
  • Remove hose from vehicle.
  • Reverse procedure to install.

Outlet

  • Remove air cleaner.
  • Drain cooling system into a suitable container.
  • Remove heater hose support clamp bolt.
  • Reposition heater hose...

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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 6.2 V8 DIESEL

  • Rotate tensioner to release belt tension, using a 1/2 inch breaker bar with a 5/8 inch socket placed on tensioner pulley.
  • Remove drive belt.
  • Route b...

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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+.

A/C Compressor & Blower Motor Diagram for 1993 GMC G25/G2500 VAN Vandura 5.0 V8 GASA/C Compressor & Blower Motor Diagram for 1993 GMC G25/G2500 VAN Vandura 5.0 V8 GAS

Components on diagram:
  • Blower Motor
  • A/C Compressor
  • Evaporator Pressure Control Switch
  • Connector C-111
  • Connector C-134
  • Engine Wiring to Shipping Panel Diagram for 1993 GMC G25/G2500 VAN Vandura 6.2 V8 DIESELEngine Wiring to Shipping Panel Diagram for 1993 GMC G25/G2500 VAN Vandura 6.2 V8 DIESEL

    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 5.0 V8 GAS Wiring Diagram1993 GMC G25/G2500 VAN Rally 5.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Radio
  • Power Antenna Relay
  • Cruise Control Module
  • Door Lock Relay
  • Keyless Entry Module
  • 1993 GMC G25/G2500 VAN Vandura 4.3 V6 GAS Wiring Diagram1993 GMC G25/G2500 VAN Vandura 4.3 V6 GAS Wiring Diagram

    Components on diagram:
  • Turn Signal Switch
  • Audio Alarm Module
  • LH Door Jamb Switch
  • Safety Belt Buckle
  • IP Cluster Connector
  • 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 details1974 GMC G25/G2500 Van Intake Manifold Gasket, 1.35 in. x 2.26 in. port dimensions, 0.125 in. thick; Made from high-quality cellulose/nitrile composition gasket material; Provides excellent sealing and durability; Can be trimmed if needed for modified ports; Ideal for OE replacement, high performance street use, drag racing, or oval track racing; With Mr. Gasket's limited 90-day warranty..

    Source: Auto Body Parts Store

    $16.57

    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 1-year limited TruckEFX warranty..

    Source: Auto Body Parts Store

    $22.59

    Click here to view more details about 2013 GMC Pickup Sierra 17" x 7.5" Steel Wheel2013 GMC Pickup Sierra 17" x 7.5" Steel Wheel, Steel Wheel; 17 X 7.5; 31MM Offset; 8 Round Vents; 6 Lug; 6.5 Inch BP; Ident UTX; Black, , .

    Source: Wheels / Rims, Mirrors & Lights Store

    $69.50

    Click here to view more details about 1985 GMC G25/G2500 Van Vandura V8, 5.7 L, 350 CID Rebuilt Engine1985 GMC G25/G2500 Van Vandura V8, 5.7 L, 350 CID Rebuilt Engine, Flat lifters, 4-bolt main., Warranty: 3-Year/100,000 Mile, .

    Source: Rebuilt Engines Store

    $1,187.00

    Click here to view more details1975 GMC G25/G2500 VAN Used Ignition Coil, 8-305 (5.0L), Very Good.

    Source: Used Auto Parts Store

    $55.00

    Click here to view more details1990 GMC G25/G2500 VAN Used Headlight, Driver Side, dual lamps, Very Good.

    Source: Used Auto Parts Store

    $77.00
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