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2003 GMC Yukon XL 2500 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
- Cabin Air Filter Locations & Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
- Serpentine Belt Service
A/C & HEATER SERVICE PROCEDURES FOR 2003 GMC Yukon XL 2500 AUTOMOBILES
General Service Domestic Vehicles -> 2003-04 -> Charging System -> Caravan, Town & Country & Voyager -> Cherokee, Dakota, Full Size Pickups, Liberty, PT Cruiser & Vans, Grand Cherokee & Wrangler -> Concorde, Intrepid, LHS & 300M -> DaimlerChrysler Corp. -> Ford Motor Company -> General Motors -> Neon -> Sebring & Stratus Coupe -> Sebring & Stratus Sedan & Sebring Convertible
Vehicle: 2003 GMC Yukon XL 2500 6.0 V8 GAS
DaimlerChrysler Corp.
Sebring & Stratus Coupe
Never use cans to charge into high pressure side of system (compressor discharge port) or into system at high temperature, as high system pressure transferred into charging may cause it to explode.
- Attach center hose from manifold gauge set to refrigerant dispensing manifold. Turn refrigerant manifold valves completely counterclockwise to open fully, remove protective caps from refrigerant manifold.
- Screw refrigerant cans into manifold. Ensure gasket is in place and in good condition. Torq...
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BRAKE SERVICE PROCEDURES FOR 2003 GMC Yukon XL 2500 AUTOMOBILES
Disc Brakes -> Delco Dual Piston Sliding Caliper -> Caliper Service -> Assemble -> Disassemble -> Inspection -> Installation -> Removal
Vehicle: 2003 GMC Yukon XL 2500 8.1 V8 GAS
Removal
- Siphon 2/3 of the brake fluid from master cylinder.
- Raise and support vehicle.
- Remove tire and wheel assembly.
- Compress caliper pistons until they bottom in bores using suitable clamp,. Fig. .
- Disconnect brake hose at caliper by removing inlet fitting bolt.
- Remove mounting bolts and caliper.
Inspection
Should it become required to remove the caliper for installation of new components, clean components in denatured alcohol, wipe dry using lint-free cloths. Blow out drilled passages and holes using compressed air. Inspect dust boots for punctures or tears. If punctures or tears ar...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 2003 GMC Yukon XL 2500 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: 2003 GMC Yukon XL 2500 6.0 V8 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...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2003 GMC Yukon XL 2500 AUTOMOBILES
DRIVESHAFT U-JOINT, Replace -> Assemble -> Disassemble
Vehicle: 2003 GMC Yukon XL 2500 8.1 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 2003 GMC Yukon XL 2500 AUTOMOBILES
Starter, Replace
Vehicle: 2003 GMC Yukon XL 2500 6.0 V8 GAS
- Disconnect battery ground cable.
- Remove mounting bolts and engine shield, if required.
- Remove mounting bolts and oil pan skid plate, if required.
- Remove righthand transmission cover bolt.
- Remove front axle mounting bracket nut, then position front axle mounting bracket bolt until tip is flush with support bushing. Do not remove bolt.
- Remove starter motor mounting bolts and slide starter forward until it clears transmission.
- Disconnect oil level sensor electrical connector.
- Remove starter...
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CABIN AIR FILTER LOCATIONS & REPLACEMENT PROCEDURES FOR 2003 GMC Yukon XL 2500 AUTOMOBILES
Cabin Air Filter Service -> General Motors Corp./Saturn -> 1999-2007 Silverado, Sierra, 2000-07 Denali, Suburban, Tahoe, Yukon, Yukon XL, 2001-07 Escalade & 2002-07 Avalanche
Vehicle: 2003 GMC Yukon XL 2500 6.0 V8 GAS
Under normal operating conditions the cabin air filter should be replaced every 15,000 miles. In dusty areas change the cabin air filter more often.
- Remove the righthand instrument panel hush panel.
- Remove the A/C and heater modul...
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MAINTENANCE LAMP RESET PROCEDURES FOR 2003 GMC Yukon XL 2500 AUTOMOBILES
General Motors Corp./Saturn Trucks -> StabiliTrak Control System Warning Lamp ->
Vehicle: 2003 GMC Yukon XL 2500 6.0 V8 GAS
This lamp should light for a approximately 6-8 seconds when the ignition is turned On as a bulb check. If the warning...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2003 GMC Yukon XL 2500 AUTOMOBILES
Coolant Hose, Replace -> Lower -> Upper
Vehicle: 2003 GMC Yukon XL 2500 8.1 V8 GAS
Lower
- Drain cooling system into a suitable container.
- Remove heater and surge tank hoses from mounting clip.
- Reposition surge tank outlet hose clamp at surge tank.
- Remove surge tank outlet hose from surge tank.
- Reposition hose clamp from water pump housing.
- Remove radiator outlet hose from water pump housing.
- Reposition hose clamp from ...
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SERPENTINE BELT SERVICE PROCEDURES FOR 2003 GMC Yukon XL 2500 AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2003 GMC Yukon XL 2500 6.0 V8 GAS
- Rotate tensioner clockwise to release belt tension using suitable wrench, then remove belt.
- Route belt over pulleys excep...
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COMPONENT LOCATION DIAGRAMS FOR 2003 GMC Yukon XL 2500 AUTOMOBILES
Component location diagrams for most 2003 GMC Yukon XL 2500 cars and light trucks sold in the U.S. from 1990+.
Rear Frame, Rear Lamp Components Diagram for 2003 GMC Yukon XL 2500 6.0 V8 GAS Components on diagram: |
Heated Oxygen Sensors Diagram for 2003 GMC Yukon XL 2500 6.0 V8 GAS Components on diagram: |
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WIRING DIAGRAMS FOR 2003 GMC Yukon XL 2500 AUTOMOBILES
OEM drawn wiring diagrams for most 2003 GMC Yukon XL 2500 cars and light trucks sold in the U.S.
2003 GMC Yukon XL 2500 8.1 V8 GAS Wiring Diagram Components on diagram: |
2003 GMC Yukon XL 2500 6.0 V8 GAS Wiring Diagram Components on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 2003 GMC Yukon XL 2500 AUTOMOBILES
OEM TSB listings for most 2003 GMC Yukon XL 2500 cars and light trucks sold in the U.S. from 1985+.
Document: Revised General Motors New Vehicle Tire Warranty Program Vehicle: 2003 GMC Yukon XL 2500 6.0 V8 GAS Auto Systems: |
Document: Power Folding Mirrors Will Not Fold Inward Vehicle: 2003 GMC Yukon XL 2500 6.0 V8 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 2003 GMC Yukon XL 2500 AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2003 GMC Yukon XL 2500 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 2003 GMC Yukon XL 2500 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 2003 GMC Yukon XL 2500 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 2003 GMC Yukon XL 2500 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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