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1993 GMC C2500 Suburban CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT GMC REPAIR SHOPS DON'T WANT YOU TO KNOW
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- Wiring Diagrams
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- A/C & Heater Service
- Brake Service
- Fuel Filter Replacement
- Driveline, U-Joint & CV Axles Replacement
- Starter & Alternator Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
- Serpentine Belt Service
A/C & HEATER SERVICE PROCEDURES FOR 1993 GMC C2500 Suburban AUTOMOBILES
Vacuum & Wiring Diagrams -> Light Duty Trucks & Vans -> Compressor
Vehicle: 1993 GMC C2500 Suburban 5.7 V8 GAS
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BRAKE SERVICE PROCEDURES FOR 1993 GMC C2500 Suburban 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 C2500 Suburban 5.7 V8 GAS
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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FUEL FILTER REPLACEMENT PROCEDURES FOR 1993 GMC C2500 Suburban 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 C2500 Suburban 5.7 V8 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 C2500 Suburban AUTOMOBILES
CV AXLE SHAFT, Replace -> Install -> Remove
Vehicle: 1993 GMC C2500 Suburban 5.7 V8 GAS
Remove
- Raise and support vehicle.
- Remove wheel and tire assembly.
- Remove drive axle center cap, if equipped.
- Insert a drift or large screwdriver through brake caliper into one of the brake rotor vanes in order to prevent drive axle wheel drive shaft from turning.
- Remove nut and washer from hub. Do not reuse nut. A new nut must be used when installing wheel drive shaft.
- Using axle remover tool No. J 45859 or equivalent, press wheel drive shaft from hub.
- Remove bolts securing wheel drive shaft inboard flange to output shaft flange.
- Remove drift from rotor.
- Remove stabilizer shaft li...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1993 GMC C2500 Suburban AUTOMOBILES
Starter, Replace
Vehicle: 1993 GMC C2500 Suburban 7.4 V8 GAS
- Disconnect battery ground cable.
- Remove starter braces or heat shields, if equipped.
- Disconnect starter solenoid electrical connectors.
- Raise and support vehicle.
- Remove attaching bolts, nuts and washers from starter mot...
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MAINTENANCE LAMP RESET PROCEDURES FOR 1993 GMC C2500 Suburban AUTOMOBILES
General Motors Corp./Saturn Trucks -> All Wheel Drive (AWD) System Warning Lamp ->
Vehicle: 1993 GMC C2500 Suburban 7.4 V8 GAS
This lamp should light for a approximately 6-8 seconds when the ignition is turned On as a bulb check. If the war...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1993 GMC C2500 Suburban AUTOMOBILES
Coolant Hose, Replace -> Lower -> Upper
Vehicle: 1993 GMC C2500 Suburban 7.4 V8 GAS
Lower
- Drain cooling system into a suitable container.
- Reposition hose clamp from radiator.
- Remove radiator outlet hose from radiator.
- Reposition hose clamp from coolant pump.
- Remove radiator outlet hose from coolant pump and from vehicle.
- Reverse procedure...
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SERPENTINE BELT SERVICE PROCEDURES FOR 1993 GMC C2500 Suburban AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 1993 GMC C2500 Suburban 7.4 V8 GAS
- Rotate tensioner counterclockwise, using a 1/2 inch breaker bar with a socket placed on tensioner ...
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COMPONENT LOCATION DIAGRAMS FOR 1993 GMC C2500 Suburban AUTOMOBILES
Component location diagrams for most 1993 GMC C2500 Suburban cars and light trucks sold in the U.S. from 1990+.
A/C Pressure Cycling Switch Diagram for 1993 GMC C2500 Suburban 5.7 V8 GAS Components on diagram: |
RWAL Components Diagram for 1993 GMC C2500 Suburban 5.7 V8 GAS Components on diagram: |
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WIRING DIAGRAMS FOR 1993 GMC C2500 Suburban AUTOMOBILES
OEM drawn wiring diagrams for most 1993 GMC C2500 Suburban cars and light trucks sold in the U.S.
1993 GMC C2500 Suburban 5.7 V8 GAS Wiring Diagram Components on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1993 GMC C2500 Suburban AUTOMOBILES
OEM TSB listings for most 1993 GMC C2500 Suburban 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 C2500 Suburban 5.7 V8 GAS Auto Systems: |
Document: Air Conditioning Odor Vehicle: 1993 GMC C2500 Suburban 5.7 V8 GAS Symptoms: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1993 GMC C2500 Suburban AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1993 GMC C2500 Suburban 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 C2500 Suburban 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 C2500 Suburban 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 C2500 Suburban 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
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