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1994 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 1994 GMC C1500 Pickup AUTOMOBILES
Air Bag System Precautions -> General Motors Corp. -> Arming -> Light Trucks & Vans -> Passenger Cars
Vehicle: 1994 GMC C1500 Pickup Sierra XC 6.5 V8 DIESEL
Passenger Cars
Reverse disarming procedures to arm the Supplemental Restraint System, noting the following:
- Ensure all disconnected SRS electrical connectors are securely connected and routed.
- Install all removed fuses in proper locations.
- From a safe position at sides of or below air bag module, Turn ignition switch to ON position and observe Air Bag or SRS warning lamp.
- On all models except Prizm and 1990 Corvette, warning lamp should flash seven to nine times, then go off.
- On Prizm models, warning lamp should light for six seconds,...
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BRAKE SERVICE PROCEDURES FOR 1994 GMC C1500 Pickup AUTOMOBILES
Power Brake Units -> Delco-Moraine Brake Boosters -> Power Brake Unit Service -> Assemble -> Disassemble -> Single Diaphragm Type -> Tandem (Dual) Diaphragm Type
Vehicle: 1994 GMC C1500 Pickup Sierra XC 4.3 V6 GAS
Single Diaphragm Type
Disassemble
- Remove boot, silencer, vacuum check valve, grommet and front housing seal, Fig. .
- Scribe a line across front and rear housing, then mount brake booster to brake mounting fixture tool No. J 23456 or equivalent, Fig. .
- Turn fixture handle counterclockwise to unlock housings.
- Remove return spring, power piston assembly and power piston bearing from rear housing, Fig. .
- Remove reaction body retainer, piston rod, reaction retainer and filter.
- Remove power piston and pushrod assembly as follows:
- While holding the pushrod down against a hard surface, ...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 1994 GMC C1500 Pickup AUTOMOBILES
General Motors Corp./Saturn Light Trucks, SUVs & Vans -> Fuel Filter Scheduled Maintenance -> 1988-95 C/K, G & R/V Series w/Gasoline Engine -> Heavy Duty Emissions -> Light Duty Emissions -> Normal Service -> Severe Service
Vehicle: 1994 GMC C1500 Pickup Sierra 5.0 V8 GAS
Light Duty Emissions
Normal Service
Replace every 60,000 miles
Severe Service
Rep...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1994 GMC C1500 Pickup AUTOMOBILES
DRIVESHAFT, Replace -> One Piece Driveshaft -> Three Piece Driveshaft -> Two Piece Driveshaft
Vehicle: 1994 GMC C1500 Pickup Sierra 6.5 V8 DIESEL
One Piece Driveshaft
- Reference mark propeller shaft to pinion flange connection.
- Reference mark slip yoke to transmission for proper reassembly.
- When servicing driveshafts with pop on seal, do not remove seal from sleeve. Removal of seal causes damage to seal lip where it contacts sleeve yoke. If removal of seal is necessary, replace seal with a new unit.
- Remove bolts.
- Remove retainers.
- Remove yoke and cross assembly, wrapping bearing cups with tape in order to prevent loss of bearing rollers. When removing propeller shaft, do not attempt to remove shaft by pounding on yoke ears o...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1994 GMC C1500 Pickup AUTOMOBILES
Starter, Replace
Vehicle: 1994 GMC C1500 Pickup Sierra XC 4.3 V6 GAS
- Disconnect battery ground cable.
- Remove starter braces or heat shields, if equipped.
- Disconnect starter solenoid electrical connectors.
- Raise and support vehicle.
- Remove at...
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MAINTENANCE LAMP RESET PROCEDURES FOR 1994 GMC C1500 Pickup AUTOMOBILES
General Motors Corp./Saturn Trucks -> Reduce Engine Power Indicator Lamp ->
Vehicle: 1994 GMC C1500 Pickup Sierra XC 5.7 V8 GAS
The Reduce Engine Power indicator lamp should light for a approximately 3 seconds when the ignition is turned On as a bulb check. If the warning lamp turns On during vehicle operation, a vehicl...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1994 GMC C1500 Pickup AUTOMOBILES
Heater Hose, Replace -> Inlet -> Outlet
Vehicle: 1994 GMC C1500 Pickup Sierra 5.7 V8 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 1994 GMC C1500 Pickup AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 1994 GMC C1500 Pickup Sierra 6.5 V8 DIESEL
- Rotate tensioner to release belt tension, using a 1/2 inch breaker bar with a 5/8 inch socket placed on tensioner pulley.
- Remove drive belt.
- Route b...
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COMPONENT LOCATION DIAGRAMS FOR 1994 GMC C1500 Pickup AUTOMOBILES
Component location diagrams for most 1994 GMC C1500 Pickup cars and light trucks sold in the U.S. from 1990+.
LH Side of Cowl Wiring Diagram for 1994 GMC C1500 Pickup Sierra XC 5.7 V8 GAS Components on diagram: |
LH Side of Steering Column Wiring Diagram for 1994 GMC C1500 Pickup Sierra XC 4.3 V6 GAS Components on diagram: |
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WIRING DIAGRAMS FOR 1994 GMC C1500 Pickup AUTOMOBILES
OEM drawn wiring diagrams for most 1994 GMC C1500 Pickup cars and light trucks sold in the U.S.
1994 GMC C1500 Pickup Sierra XC 6.5 V8 DIESEL Wiring Diagram Components on diagram: |
1994 GMC C1500 Pickup Sierra XC 5.0 V8 GAS Wiring Diagram Components on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1994 GMC C1500 Pickup AUTOMOBILES
OEM TSB listings for most 1994 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: 1994 GMC C1500 Pickup Sierra 4.3 V6 GAS Auto Systems: |
Document: Bumps or Rust Colored Spots in Paint Due to Rail or Iron Dust Vehicle: 1994 GMC C1500 Pickup Sierra 4.3 V6 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1994 GMC C1500 Pickup AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1994 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 1994 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 1994 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 1994 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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