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GMC S15 Pickup 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 GMC S15 Pickup 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 S15 Pickup 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 GMC S15 Pickup 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 GMC S15 Pickup AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported GMC S15 Pickup cars and light trucks from 1990+

A/C & Cooling System Maintenance -> General Motors Corp. -> 1990-2002 Chevrolet & GMC S & T Series & Oldsmobile Bravada
Vehicle: 1990 GMC S15 Pickup 2.8 V6 GAS

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BRAKE SERVICE PROCEDURES FOR GMC S15 Pickup AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported GMC S15 Pickup cars and light trucks from 1990+.

ANTI-LOCK BRAKES, GENERAL MOTORS -> Four Wheel Anti-Lock Brake System -> SYSTEM SERVICE -> BLEEDING EHCU MODULE
Vehicle: 1990 GMC S15 Pickup 4.3 V6 GAS

BLEEDING EHCU MODULE

The EHCU Module should be bled after replacement or if trapped air is in the unit. If bleeding is required the module must be bled thoroughly before the wheel cylinders and calipers.

There are two bleeders on top of the unit that appear to be normal bleeders, Fig. . These are modulator bleeders and must remain closed when the unit is not pressurized.

The internal bleeders are on either side of EHCU module. The valves are used to open the internal passages within the EHCU module. Both bleed valves must be rotated 1/4-1/2 a turn counterclockwise before beginning t...

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FUEL FILTER REPLACEMENT PROCEDURES FOR GMC S15 Pickup AUTOMOBILES

Fuel filter replacement procedures with corresponding images for most domestic and imported GMC S15 Pickup cars and light trucks sold in the U.S. for 1980+.

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: 1990 GMC S15 Pickup 2.5 L4 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 GMC S15 Pickup AUTOMOBILES

Includes CV axle, universal joint, and driveline replacement, for domestic and imported GMC S15 Pickup cars and light trucks from 1990+.

DRIVESHAFT U-JOINT, Replace -> Assemble -> Disassemble
Vehicle: 1990 GMC S15 Pickup 2.5 L4 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 GMC S15 Pickup AUTOMOBILES

Includes starter and alternator replacement procedures for domestic and imported GMC S15 Pickup cars and light trucks from 1990+.

Starter, Replace
Vehicle: 1990 GMC S15 Pickup 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 outer bolt. If starter makes a high pitched whine after firing, add .015 inch double shims until noise ceases.

  • Disconnect battery ground cable.
  • Raise and support front of vehicle.
  • Raise vehicle half way to gain access to starter motor.
  • Re...

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MAINTENANCE LAMP RESET PROCEDURES FOR GMC S15 Pickup AUTOMOBILES

Maintenance lamp reset procedures with corresponding images for most domestic and imported GMC S15 Pickup cars and light trucks sold in the U.S. from 1990+.

General Motors Corp./Saturn Trucks -> Low Coolant Lamp ->
Vehicle: 1990 GMC S15 Pickup 4.3 V6 GAS

This lamp should light when engine coolant level in the radiator drops below a predetermined le...

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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR GMC S15 Pickup AUTOMOBILES

Includes radiator, cooling and heater hose replacement procedures for domestic and imported GMC S15 Pickup cars and light trucks from 1990+

Radiator, Replace
Vehicle: 1990 GMC S15 Pickup 2.8 V6 GAS

  • Drain cooling system into a suitable container.
  • Remove overflow hose.
  • Remove upper fan shroud.
  • Remove radiator hose inlet.
  • Remove radiator hose outlet.
  • Remove heater outlet hose.
  • Remove transmission oil cooler lines.
  • Remove engine oil cooler lines.
  • Remove two radiator mounting bolts.
  • Remove radiator f...

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SERPENTINE BELT SERVICE PROCEDURES FOR GMC S15 Pickup AUTOMOBILES

Serpentine belt replacement procedures with corresponding images for most domestic and imported GMC S15 Pickup cars and light trucks sold in the U.S. from 1990+.

Serpentine Drive Belt, Replace
Vehicle: 1990 GMC S15 Pickup 2.8 V6 GAS

  • Rotate or lift the belt tensioner arm, using a suitable tool to relieve tension from dr...

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COMPONENT LOCATION DIAGRAMS FOR GMC S15 Pickup AUTOMOBILES

Component location diagrams for most GMC S15 Pickup cars and light trucks sold in the U.S. from 1990+.

Front Of I/P Diagram for 1990 GMC S15 Pickup  2.8 V6 GASFront Of I/P Diagram for 1990 GMC S15 Pickup 2.8 V6 GAS

Components on diagram:
  • Fuse Panel
  • Door Jamb Switch
  • Connector C330
  • Connector C329
  • Connector C326
  • LH Side Of Transmission   Diagram for 1989 GMC S15 Pickup  2.8 V6 GASLH Side Of Transmission Diagram for 1989 GMC S15 Pickup 2.8 V6 GAS

    Components on diagram:
  • Speed Sensor
  • TCC Solenoid
  • Back-Up Lamp Switch
  • Connector C139
  • Connector C157
  • CLICK HERE TO GET FULL ACCESS TO GMC S15 Pickup PARTS/COMPONENTS LOCATION DIAGRAMS!

    WIRING DIAGRAMS FOR GMC S15 Pickup AUTOMOBILES

    OEM drawn wiring diagrams for most GMC S15 Pickup cars and light trucks sold in the U.S.

    1990 GMC S15 Pickup  4.3 V6 GAS Wiring Diagram1990 GMC S15 Pickup 4.3 V6 GAS Wiring Diagram

    Components on diagram:
  • Horn
  • Convenience Center
  • Directional Signal Switch
  • 1990 GMC S15 Pickup  2.8 V6 GAS Wiring Diagram1990 GMC S15 Pickup 2.8 V6 GAS Wiring Diagram

    Components on diagram:
  • Wiper Motor
  • Windshield Washer Pump
  • CLICK HERE TO GET FULL ACCESS TO GMC S15 Pickup WIRING DIAGRAMS!

    TECHNICAL SERVICE BULLETINS FOR GMC S15 Pickup AUTOMOBILES

    OEM TSB listings for most GMC S15 Pickup cars and light trucks sold in the U.S. from 1985+.

    Document: PITTING AND BRAKE DUST ON CHROME WHEELS - REVISED
    Vehicle: 1990 GMC S15 Pickup 2.5 L4 GAS

    Auto Systems:
  • Wheels, Tires, Wheel Bearings, Seals, Hubs
  • Brakes, Power Brakes, Traction Control
  • Document: SERVICE INFORMATION ON CONSOLIDATING THE USE OF LIQUID GASKET ENGINE SEALANTS
    Vehicle: 1985 GMC S15 Pickup 2.2 L4 DIESEL

    Auto Systems:
  • Diesel Engines
  • Gasoline Engines
  • Seals, Gaskets, Sealants
  • CLICK HERE TO GET FULL ACCESS TO GMC S15 Pickup TECHNICAL SERVICE BULLETINS!

    COMPONENT/PARTS SPECIFICATIONS FOR GMC S15 Pickup AUTOMOBILES

    BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most GMC S15 Pickup 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 GMC S15 Pickup 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 GMC S15 Pickup 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 GMC S15 Pickup 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 GMC S15 Pickup SPECIFICATIONS DATA!

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

    Click here to view more details1997 GMC C1500 Fan Clutch, Heavy-duty thermal design; 7.2 in. overall diameter, M30 x 1.5 pilot diameter/thread size, 0.7 in. pilot depth, 1.44 in. hexagonal flange diameter, 1.75 in. fan mount height, 3.25 in. fan bolt circumference, 2.52 in. fan mount diameter, 3.47 in. overall height; AutoTrust Platinum products are guaranteed to meet or exceed the original manufacturer's standards and quality; <b>Backed by a 5-year unlimited warranty</b>; If the part breaks or is damaged anytime within 5 years from purchase, simply cover shipping and handling and we will send you a new part - even if we have already sent you a new product and it becomes damaged again..

    Source: Auto Body Parts Store

    $34.46

    Click here to view more details about 1998 GMC K2500 Fan Shroud1998 GMC K2500 Fan Shroud, Single type; Made from tough material for maximum strength and durability; Guides and facilitates airflow created by radiator fan; Increases cooling potential of your vehicle; Backed by 1-year, unlimited-mileage warranty..

    Source: Auto Body Parts Store

    $28.75

    Click here to view more details2009 GMC Envoy Passenger Side Head Light Assembly, Passenger Side Head Light Assembly, , .

    Source: Wheels / Rims, Mirrors & Lights Store

    $76.50

    Click here to view more details1990 GMC S15 Pickup L4, 2.5 L, 2474 CC, 151 CID Rebuilt Engine, RWD, Roller cam, S-10, Block #311, 046, Head #642, Crank #543. Also see 58151-09 & 58151-11, Warranty: 3-Year/100,000 Mile, .

    Source: Rebuilt Engines Store

    $1,379.00

    Click here to view more details1988 GMC S15 Pickup Used Condenser Assembly, 4.3, COL, 4X2 6-262 (4.3L), Very Good.

    Source: Used Auto Parts Store

    $141.00

    Click here to view more details1988 GMC S15 Pickup Used Fan Clutch, (8-350, 5.7L), ID GJ, Very Good.

    Source: Used Auto Parts Store

    $70.00
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