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1993 GMC Sonoma 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 Sonoma 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 Sonoma 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 Sonoma 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 Sonoma 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 Sonoma 2.8 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 Sonoma AUTOMOBILES

Drum Brakes -> Brake Service -> C & K Series w/Non-Servo Brakes -> Duo-Servo Brakes -> Installation -> Lumina APV, Silhouette & Trans Sport -> Removal -> Tracker
Vehicle: 1993 GMC Sonoma 4.3 V6 GAS

Duo-Servo Brakes

Removal
  • Raise and support vehicle, then remove tire and wheel assembly.
  • Remove brake drum. If brake lining is dragging on brake drum, back off brake adjustment by rotating adjustment screw. Refer to individual truck chapter for procedure. If brake drum is rusted or corroded to axle flange and cannot be removed, lightly tap flange to drum mounting surface with a suitable hammer.
  • Using brake spring pliers or equivalent, unhook primary and secondary return springs, Fig. . Observe location of brake parts being removed to aid during installation.
  • Remove brake hold-down spri...

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FUEL FILTER REPLACEMENT PROCEDURES FOR 1993 GMC Sonoma AUTOMOBILES

General Motors Corp./Saturn Light Trucks, SUVs & Vans -> Fuel Filter Scheduled Maintenance -> 1992-05 S/T Series Blazer, Bravada, Jimmy & Pickup -> Normal Service -> Severe Service
Vehicle: 1993 GMC Sonoma 4.3 V6 GAS

Normal Service

R...

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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1993 GMC Sonoma AUTOMOBILES

DRIVESHAFT, Replace -> Front -> Install -> One Piece Driveshaft -> Rear -> Remove -> Two Piece Driveshaft
Vehicle: 1993 GMC Sonoma 4.3 V6 GAS

Front

Remove
  • Raise and support vehicle.
  • Mark the front U-joint to the pinion yoke on the front differential.
  • Mark the relationship of the rear U-joint to the transfer case drive flange.
  • Remove the retaining nuts and bolts from the drive flange.
  • Remove the clamps and retaining bolts from the front drive axle pinion flange.
  • Remove the front propeller shaft from the vehicle.
  • Using tape and or a rubber band, wrap the front U-joint bearing caps to ensure the caps do not separate from the U-joint.
Install
  • Remove the tape or rubber band from the front U-joint
  • Install the front propeller shaf...

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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1993 GMC Sonoma AUTOMOBILES

Starter, Replace
Vehicle: 1993 GMC Sonoma 2.8 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 1993 GMC Sonoma AUTOMOBILES

General Motors Corp./Saturn Trucks -> Traction Control System (TCS)/Electronic Stability Control (ESC) Warning Lamp ->
Vehicle: 1993 GMC Sonoma 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 1993 GMC Sonoma AUTOMOBILES

Heater Hose, Replace -> Inlet -> Outlet
Vehicle: 1993 GMC Sonoma 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 in...

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SERPENTINE BELT SERVICE PROCEDURES FOR 1993 GMC Sonoma AUTOMOBILES

Serpentine Drive Belt, Replace
Vehicle: 1993 GMC Sonoma 2.5 L4 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 1993 GMC Sonoma AUTOMOBILES

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

Auxiliary Battery/Relay Wiring Diagram for 1993 GMC Sonoma  4.3 V6 GASAuxiliary Battery/Relay Wiring Diagram for 1993 GMC Sonoma 4.3 V6 GAS

Components on diagram:
  • Convenience Center
  • Auxiliary Battery Relay
  • Auxiliary Battery
  • Ground G-101
  • Battery Junction Block
  • Cruise Control Module Diagram for 1993 GMC Sonoma  2.5 L4 GASCruise Control Module Diagram for 1993 GMC Sonoma 2.5 L4 GAS

    Components on diagram:
  • Cruise Control Module
  • CLICK HERE TO GET FULL ACCESS TO 1993 GMC Sonoma PARTS/COMPONENTS LOCATION DIAGRAMS!

    WIRING DIAGRAMS FOR 1993 GMC Sonoma AUTOMOBILES

    OEM drawn wiring diagrams for most 1993 GMC Sonoma cars and light trucks sold in the U.S.

    1993 GMC Sonoma  4.3 V6 GAS Wiring Diagram1993 GMC Sonoma 4.3 V6 GAS Wiring Diagram

    Components on diagram:
  • RWAL Module
  • Instrument Cluster
  • Brake Indicator
  • Park Brake Warning Switch
  • Brake Pressure Warning Switch
  • 1993 GMC Sonoma  4.3 V6 GAS Wiring Diagram1993 GMC Sonoma 4.3 V6 GAS Wiring Diagram

    Components on diagram:
  • Vehicle Control Module
  • RWAL Module
  • Convenience Center
  • Cigarette Lighter
  • Oil Pressure Switch
  • CLICK HERE TO GET FULL ACCESS TO 1993 GMC Sonoma WIRING DIAGRAMS!

    TECHNICAL SERVICE BULLETINS FOR 1993 GMC Sonoma AUTOMOBILES

    OEM TSB listings for most 1993 GMC Sonoma 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 Sonoma 4.3 V6 GAS

    Auto Systems:
  • Labor Times, Manuals, Warranty, Aids
  • Document: Air Conditioning Odor
    Vehicle: 1993 GMC Sonoma 4.3 V6 GAS

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

    COMPONENT/PARTS SPECIFICATIONS FOR 1993 GMC Sonoma AUTOMOBILES

    BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1993 GMC Sonoma 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 Sonoma 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 Sonoma 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 Sonoma 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 Sonoma SPECIFICATIONS DATA!

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