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1991 Chevrolet S10 Pickup CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Chevrolet 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 1991 Chevrolet S10 Pickup car and truck repair procedures including Chevrolet 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 Chevrolet S10 Pickup 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 Chevrolet mechanics you can trust. The Automotix DIY solution is particularly affordable. A full access to the entire DIY repair procedures and diagrams for your 1991 Chevrolet S10 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 1991 Chevrolet S10 Pickup AUTOMOBILES

    A/C & Cooling System Maintenance -> General Motors Corp. -> 1990-2002 Chevrolet & GMC S & T Series & Oldsmobile Bravada
    Vehicle: 1991 Chevrolet S10 Pickup 2.5 L4 GAS

    [[table data]]

    CLICK HERE TO GET FULL ACCESS TO 1991 Chevrolet S10 Pickup A/C & HEATER SERVICE PROCEDURES

    BRAKE SERVICE PROCEDURES FOR 1991 Chevrolet S10 Pickup AUTOMOBILES

    ANTI-LOCK BRAKES, GENERAL MOTORS -> Rear Wheel Anti-Lock Brake System -> SYSTEM SERVICE -> ELECTRONIC CONTROL UNIT (ECU) -> Except G, R, P & V Models -> G, R, P & V Models -> ISOLATION/DUMP VALVE ASSEMBLY -> SPEED SENSOR -> SPEEDOMETER CALIBRATION
    Vehicle: 1991 Chevrolet S10 Pickup 2.5 L4 GAS

    ELECTRONIC CONTROL UNIT (ECU)

    Do not touch electrical connections and pins or allow them to come into contact with brake fluid.

    • Disconnect battery ground cable.
    • Disconnect electrical connectors from ECU.
    • Pry up tab at rear of ECU and remove unit toward front of vehicle.
    • Slide unit into bracket until tab locks into hole.
    • Inspect electrical connectors for brake fluid contamination, clean with alcohol as needed, then connect electrical connectors to ECU.

    ISOLATION/DUMP VALVE ASSEMBLY

    • Disconnect brake lines from control valve, the plug lines and open fittings.
    • Remove bolts (25) securing...

    CLICK HERE TO GET FULL ACCESS TO 1991 Chevrolet S10 Pickup BRAKE SERVICE PROCEDURES

    FUEL FILTER REPLACEMENT PROCEDURES FOR 1991 Chevrolet S10 Pickup 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: 1991 Chevrolet S10 Pickup 2.8 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...

    CLICK HERE TO GET FULL ACCESS TO 1991 Chevrolet S10 Pickup FUEL FILTER REPLACEMENT PROCEDURES

    DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1991 Chevrolet S10 Pickup AUTOMOBILES

    CV AXLE SHAFT, Replace
    Vehicle: 1991 Chevrolet S10 Pickup 2.5 L4 GAS

    • Disconnect battery ground cable.
    • Unlock steering column, then raise and support vehicle.
    • Remove wheel assembly, then axle nut and washer.
    • Support lower control arm, then remove lower shock absorber nut and bolt.
    • Scribe all revolving driveshaft components in relation to connecting component to ensure correct balance upon assembly.
    • Insert drift through opening in top of caliper into rotor cooler vanes to keep axle ...

    CLICK HERE TO GET FULL ACCESS TO 1991 Chevrolet S10 Pickup DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES

    STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1991 Chevrolet S10 Pickup AUTOMOBILES

    Alternator, Replace
    Vehicle: 1991 Chevrolet S10 Pickup 2.5 L4 GAS

    • Disconnect battery ground cable.
    • Remove alternator drive belt.
    • Remove alternator mounting bolts.
    • Remove output terminal nut.
    • Disconnect electrical connector.
    • Remove alternator from vehicle.
    • Reverse procedure to install, noting t...

    CLICK HERE TO GET FULL ACCESS TO 1991 Chevrolet S10 Pickup STARTER & ALTERNATOR REPLACEMENT PROCEDURES

    MAINTENANCE LAMP RESET PROCEDURES FOR 1991 Chevrolet S10 Pickup AUTOMOBILES

    General Motors Corp./Saturn Trucks -> Check Fuel Cap Lamp ->
    Vehicle: 1991 Chevrolet S10 Pickup 4.3 V6 GAS

    The Check Fuel Cap Lamp will illuminate momentarily when the ignition switch is placed in the On position as a bulb check. I...

    CLICK HERE TO GET FULL ACCESS TO 1991 Chevrolet S10 Pickup MAINTENANCE LAMP RESET PROCEDURES

    RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1991 Chevrolet S10 Pickup AUTOMOBILES

    Radiator, Replace
    Vehicle: 1991 Chevrolet S10 Pickup 2.5 L4 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...

    CLICK HERE TO GET FULL ACCESS TO 1991 Chevrolet S10 Pickup RADIATOR & HOSE REPLACEMENT PROCEDURES

    SERPENTINE BELT SERVICE PROCEDURES FOR 1991 Chevrolet S10 Pickup AUTOMOBILES

    Serpentine Drive Belt, Replace
    Vehicle: 1991 Chevrolet S10 Pickup 2.5 L4 GAS

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

    CLICK HERE TO GET FULL ACCESS TO 1991 Chevrolet S10 Pickup SERPENTINE BELT SERVICE PROCEDURES

    COMPONENT LOCATION DIAGRAMS FOR 1991 Chevrolet S10 Pickup AUTOMOBILES

    Component location diagrams for most 1991 Chevrolet S10 Pickup cars and light trucks sold in the U.S. from 1990+.

    Cowl Engine Components Diagram for 1991 Chevrolet S10 Pickup  2.5 L4 GASCowl Engine Components Diagram for 1991 Chevrolet S10 Pickup 2.5 L4 GAS

    Components on diagram:
  • A/C Compressor Control Relay
  • Torque Converter Clutch Solenoid
  • Backup Lamp Switch
  • Fuel Pump Relay
  • Windshield Washer Pump
  • Heater & A/C Components Diagram for 1991 Chevrolet S10 Pickup  2.5 L4 GASHeater & A/C Components Diagram for 1991 Chevrolet S10 Pickup 2.5 L4 GAS

    Components on diagram:
  • Blower Motor
  • High Blower Relay
  • Blower Resistor
  • Evaporator Pressure Control Switch
  • Accumulator
  • CLICK HERE TO GET FULL ACCESS TO 1991 Chevrolet S10 Pickup PARTS/COMPONENTS LOCATION DIAGRAMS!

    WIRING DIAGRAMS FOR 1991 Chevrolet S10 Pickup AUTOMOBILES

    OEM drawn wiring diagrams for most 1991 Chevrolet S10 Pickup cars and light trucks sold in the U.S.

    1991 Chevrolet S10 Pickup  2.5 L4 GAS Wiring Diagram1991 Chevrolet S10 Pickup 2.5 L4 GAS Wiring Diagram

    Components on diagram:
  • Dome Lamp
  • Cargo Lamp Switch
  • Cargo Lamp
  • Left Hand Door Jamb Switch
  • Right Hand Door Jamb Switch
  • 1991 Chevrolet S10 Pickup  4.3 V6 GAS Wiring Diagram1991 Chevrolet S10 Pickup 4.3 V6 GAS Wiring Diagram

    Components on diagram:
  • Wiper Motor Module
  • Windshield Washer Pump
  • Intermittent Wiper Washer Switch
  • CLICK HERE TO GET FULL ACCESS TO 1991 Chevrolet S10 Pickup WIRING DIAGRAMS!

    TECHNICAL SERVICE BULLETINS FOR 1991 Chevrolet S10 Pickup AUTOMOBILES

    OEM TSB listings for most 1991 Chevrolet S10 Pickup cars and light trucks sold in the U.S. from 1985+.

    Document: Car and Truck Fix It Right the First Time Issues
    Vehicle: 1991 Chevrolet S10 Pickup 2.5 L4 GAS

    Auto Systems:
  • Labor Times, Manuals, Warranty, Aids
  • Document: GM TIRE WARRANTY PROGRAM CLAIMS GOODWILL GUIDELINES - REVISED
    Vehicle: 1991 Chevrolet S10 Pickup 2.5 L4 GAS

    Auto Systems:
  • Labor Times, Manuals, Warranty, Aids
  • Wheels, Tires, Wheel Bearings, Seals, Hubs
  • CLICK HERE TO GET FULL ACCESS TO 1991 Chevrolet S10 Pickup TECHNICAL SERVICE BULLETINS!

    COMPONENT/PARTS SPECIFICATIONS FOR 1991 Chevrolet S10 Pickup AUTOMOBILES

    BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1991 Chevrolet S10 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 1991 Chevrolet S10 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 1991 Chevrolet S10 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 1991 Chevrolet S10 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 1991 Chevrolet S10 Pickup SPECIFICATIONS DATA!

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    Source: Auto Body Parts Store

    $39.58

    Click here to view more details about 2000 Chevrolet Blazer Bumper Filler, Front2000 Chevrolet Blazer Bumper Filler, Front, Made of high-density material for maximum durability and reliability; Designed to match OE specifications for a precise fit; Backed by 1-year, unlimited-mileage warranty..

    Source: Auto Body Parts Store

    $53.83

    Click here to view more details2001 Chevrolet S10 Pickup Center Cap, Wheel Center Cap; Fits ALY05069; Machined With Black Center BOW; Used, , .

    Source: Wheels / Rims, Mirrors & Lights Store

    $27.50

    Click here to view more details1983 Jeep CJ5 L4, 2.5 L, 151 CID Rebuilt Engine, 83-87 Eagle, 83-86 Jeep, 7/16" Head bolts, oil filter bypass in block, mechanical F/P., Warranty: 3-Year/100,000 Mile, .

    Source: Rebuilt Engines Store

    $1,297.00

    Click here to view more details2000 Chevrolet S10 Pickup Used Exhaust Manifold, 4-134 (2.2L), VIN 5, Very Good.

    Source: Used Auto Parts Store

    $171.00

    Click here to view more details1988 Chevrolet S10 Pickup Used Exhaust Manifold, 6-262 (4.3L), L., TBI, Very Good.

    Source: Used Auto Parts Store

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