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1993 GMC C1500 Pickup CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT GMC REPAIR SHOPS DON'T WANT YOU TO KNOW
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- Component Locations
- Wiring Diagrams
- Technical Service Bulletins
- Specifications
- 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 C1500 Pickup AUTOMOBILES
Manual Air Conditioning & Heater System Diagnosis & Testing -> Light Duty Trucks & Vans -> A/C COMPONENT DIAGNOSIS & TESTING -> 2.5L Engine -> 2.8L Engine -> 4.3L Engine -> Astro & Safari -> ASTRO/SAFARI -> BLOWER MOTOR -> C & K Series -> COMPRESSOR -> G SERIES -> Lumina APV, Silhouette & Trans Sport -> S & T SERIES -> TRACKER
Vehicle: 1993 GMC C1500 Pickup Sierra XC 6.2 V8 DIESEL
COMPRESSOR
ASTRO/SAFARI
Refer to Fig. , for A/C compressor diagnosis.
C & K SERIES
Refer to Fig. , for A/C compressor diagnosis.
G SERIES
Refer to Fig. , for A/C compressor diagnosis.
S & T SERIES
2.5L Engine
Refer to Fig. , for A/C compressor diagnosis.
2.8L Engine
Refer to Fig. , for A/C compressor diagnosis.
4.3L Engine
Refer to Fig. , for A/C compressor diagnosis.
TRACKER
Refer to Fig. , for A/C compressor diagnosis.
BLOWER MOTO...
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BRAKE SERVICE PROCEDURES FOR 1993 GMC C1500 Pickup AUTOMOBILES
Power Brake Units -> Delco-Moraine Brake Boosters -> POWER BRAKE UNIT REPLACEMENT -> Astro & Safari -> C & K Series -> Full Size Except C & K Series -> Lumina APV, Silhouette & Trans Sport -> S/T Series & Bravada
Vehicle: 1993 GMC C1500 Pickup Sierra XC 6.2 V8 DIESEL
Astro & Safari
- Disconnect master cylinder from power brake unit.
- Disconnect power brake unit pushrod from brake pedal.
- Remove power brake unit retaining nuts and the power brake unit.
- Reverse procedure to install.
Full Size Except C & K Series
- Remove master cylinder attaching nuts and position master cylinder aside. Do not disconnect brake lines from cylinder.
- Disconnect power brake unit pushrod from brake pedal.
- Remove attaching nuts, then the power brake unit.
- Reverse procedure to install.
S/T Series & Bravada
- Disconnect master cylinder assembly and vacuum hose from power br...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 1993 GMC C1500 Pickup 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 C1500 Pickup Sierra 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 C1500 Pickup AUTOMOBILES
DRIVESHAFT U-JOINT, Replace -> Assemble -> Disassemble
Vehicle: 1993 GMC C1500 Pickup Sierra XC 5.0 V8 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 1993 GMC C1500 Pickup AUTOMOBILES
Alternator, Replace
Vehicle: 1993 GMC C1500 Pickup Sierra 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 C1500 Pickup AUTOMOBILES
General Motors Corp./Saturn Trucks -> Service Throttle Soon Indicator Lamp ->
Vehicle: 1993 GMC C1500 Pickup Sierra 6.2 V8 DIESEL
A "Service Throttle Soon" indicator lamp is mounted in the lower righthand instrument cluster corner on these models. It lights when the ignition is turned On, but should go out approximately 1-5 seconds after the engine starts.
Traditional throttle cables are no longer used on these models. The PCM receives signals from an electron...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1993 GMC C1500 Pickup AUTOMOBILES
Radiator, Replace
Vehicle: 1993 GMC C1500 Pickup Sierra XC 6.2 V8 DIESEL
- Drain coolant from radiator into a suitable container.
- Remove upper fan shroud bolts and upper fan shroud.
- Remove upper insulators and brackets.
- Remove upper and lower radiator hoses.
- Disconnect and plug transmission fluid cooler lines.
- Disconnect and plug engine oil cooler lines.
- Remove lower fan shroud r...
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SERPENTINE BELT SERVICE PROCEDURES FOR 1993 GMC C1500 Pickup AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 1993 GMC C1500 Pickup Sierra XC 5.7 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 C1500 Pickup AUTOMOBILES
Component location diagrams for most 1993 GMC C1500 Pickup cars and light trucks sold in the U.S. from 1990+.
LH Side of I/P Diagram for 1993 GMC C1500 Pickup Sierra 6.2 V8 DIESEL Components on diagram: |
Cruise Control Module Diagram for 1993 GMC C1500 Pickup Sierra 5.7 V8 GAS Components on diagram: |
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WIRING DIAGRAMS FOR 1993 GMC C1500 Pickup AUTOMOBILES
OEM drawn wiring diagrams for most 1993 GMC C1500 Pickup cars and light trucks sold in the U.S.
1993 GMC C1500 Pickup Sierra 6.2 V8 DIESEL Wiring Diagram Components on diagram: |
1993 GMC C1500 Pickup Sierra XC 4.3 V6 GAS Wiring Diagram Components on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1993 GMC C1500 Pickup AUTOMOBILES
OEM TSB listings for most 1993 GMC C1500 Pickup 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 C1500 Pickup Sierra 4.3 V6 GAS Auto Systems: |
Document: Air Conditioning Odor Vehicle: 1993 GMC C1500 Pickup Sierra 4.3 V6 GAS Symptoms: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1993 GMC C1500 Pickup AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1993 GMC C1500 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 1993 GMC C1500 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 1993 GMC C1500 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 1993 GMC C1500 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
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