2008 GMC Sierra 2500 HD REPAIR MANUAL -- HOW TO FIX YOUR CAR OR TRUCK

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2008 GMC Sierra 2500 HD 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 2008 GMC Sierra 2500 HD 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 Sierra 2500 HD 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 2008 GMC Sierra 2500 HD vehicle will cost less than a single gallon of gas. Here are some of the DIY repair tips and procedures you will find here:

BRAKE SERVICE PROCEDURES FOR 2008 GMC Sierra 2500 HD AUTOMOBILES

Anti-Lock Brakes -> Bosch ABS/EBD/TCS/VSES -> Diagnosis & Testing -> Accessing Diagnostic Trouble Code -> Clearing Diagnostic Trouble Codes -> Connector Pin Identification -> Diagnostic Tests -> Diagnostic Trouble Code Interpretation -> Intermittents & Poor Connections -> Symptom Tests
Vehicle: 2008 GMC Sierra 2500 HD SLT 6.0 V8 GAS

Accessing Diagnostic Trouble Code

Connect a suitably programmed scan tool to Data Link Connector (DLC) and follow manufacturers instructions.

Diagnostic Trouble Code Interpretation

Refer to "Diagnostic Tests" for trouble code interpretation.

Connector Pin Identification

Refer to Figs. through for connector pin identifications.

Diagnostic Tests

[[table data]]

Symptom Tests

Refer to Figs. and for symptom diagnosis.

Intermittents & Poor Connections

Most Intermittents are caused by faulty electrical connections or wiring, although a...

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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2008 GMC Sierra 2500 HD AUTOMOBILES

DRIVESHAFT, Replace -> Front -> One-Piece Driveshaft -> Rear -> Two-Piece Driveshaft
Vehicle: 2008 GMC Sierra 2500 HD SLT 6.6 V8 DIESEL

Front

Before disassembly, observe and accurately reference mark all driveline components relative to the propeller shaft and axles. These items include propeller shafts, wheel drive shafts, pinion flanges and output shafts.

Assemble all components in the exact relationship to each other as they were prior to removal. Observe all published specifications and torque values, and any measurements obtained prior to disassembly.

  • Raise and support vehicle.
  • Remove transfer case shield, if equipped.
  • If equipped with double clamp style boot, remove clamp at transfer case by prying up expos...

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TIRE PRESSURE MONITORING SYSTEM PROCEDURES FOR 2008 GMC Sierra 2500 HD AUTOMOBILES

Wiring Diagrams -> Wire Color Code Identification
Vehicle: 2008 GMC Sierra 2500 HD SLT 6.6 V8 DIESEL

Refer to Figs. through for w...

[[table data]]

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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2008 GMC Sierra 2500 HD AUTOMOBILES

Alternator, Replace
Vehicle: 2008 GMC Sierra 2500 HD SLT 6.0 V8 GAS

  • Disconnect battery ground cable.
  • Disconnect positive crankcase ventilation hose from air cleaner outlet resonator.
  • Loosen air cleaner outlet resonator clamps at mass air flow intake air temperature sensor and at throttle body.
  • Remove air cleaner outlet resonator.
  • Remove drive belt using suitable tools.
  • Remove engine wiring harness clip from air conditioning compressor and condenser hose bracket.
  • Remove air conditioning compressor and condenser hose bracket bolt.
  • Remove heate...

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MAINTENANCE LAMP RESET PROCEDURES FOR 2008 GMC Sierra 2500 HD AUTOMOBILES

General Motors Corp./Saturn Trucks -> Water In Fuel Or Drain Fuel Filter Warning Lamp -> Diesel Engine
Vehicle: 2008 GMC Sierra 2500 HD SLE 6.6 V8 DIESEL

The Water In Fuel indicator should light when excessive water has entered the fuel system. As the fuel filter becomes plugged, a low pressure sensor activates the lamp. The lamp should light during engine starting as a bulb inspection. Once the engine has started, the lamp should go off. If the lamp is lit intermittently, drain fuel filter. If lamp remains lit, drain fuel filter. If the lamp still remains on after fuel filter has been drained, replace fuel filter. If lamp is lit dur...

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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2008 GMC Sierra 2500 HD AUTOMOBILES

Coolant Hose, Replace -> Lower -> Upper
Vehicle: 2008 GMC Sierra 2500 HD SLT 6.6 V8 DIESEL

Lower

  • Drain cooling system into a suitable container.
  • Remove air cleaner outlet duct.
  • Remove air cleaner housing.
  • Reposition hose clamp from engine.
  • Remove radiator outlet hose from engine.
  • Reposition hose clamp from radiator.
  • Remove radiator outlet hose from radiator and from vehicle.
  • Reverse procedure to inst...

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SERPENTINE BELT SERVICE PROCEDURES FOR 2008 GMC Sierra 2500 HD AUTOMOBILES

Serpentine Drive Belt, Replace
Vehicle: 2008 GMC Sierra 2500 HD SLT 6.6 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, then remove belt.
  • Route be...

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COMPONENT LOCATION DIAGRAMS FOR 2008 GMC Sierra 2500 HD AUTOMOBILES

Component location diagrams for most 2008 GMC Sierra 2500 HD cars and light trucks sold in the U.S. from 1990+.

Engine Components Diagram for 2008 GMC Sierra 2500 HD WT 6.0 V8 GASEngine Components Diagram for 2008 GMC Sierra 2500 HD WT 6.0 V8 GAS

Components on diagram:
  • Heated Oxygen Sensor Bank 2 Sensor 1
  • Heated Oxygen Sensor Bank 1 Sensor 1
  • Heated Oxygen Sensor Bank 2 Sensor 2
  • Heated Oxygen Sensor Bank 1 Sensor 2
  • Rear Body Diagram for 2008 GMC Sierra 2500 HD WT 6.6 V8 DIESELRear Body Diagram for 2008 GMC Sierra 2500 HD WT 6.6 V8 DIESEL

    Components on diagram:
  • X408
  • J403
  • J404
  • Rear Connector Junction Block
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    WIRING DIAGRAMS FOR 2008 GMC Sierra 2500 HD AUTOMOBILES

    OEM drawn wiring diagrams for most 2008 GMC Sierra 2500 HD cars and light trucks sold in the U.S.

    2008 GMC Sierra 2500 HD SLE 6.0 V8 GAS Wiring Diagram2008 GMC Sierra 2500 HD SLE 6.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Body Control Module
  • Inflatable Restraint Steering Wheel Module Coil
  • RH Steering Wheel Control Switch
  • LH Steering Wheel Control Switch
  • Heated Steering Wheel Control Module
  • 2008 GMC Sierra 2500 HD SLT 6.6 V8 DIESEL Wiring Diagram2008 GMC Sierra 2500 HD SLT 6.6 V8 DIESEL Wiring Diagram

    Components on diagram:
  • Transmission Control Module
  • Automatic Transmission
  • Engine Control Module
  • Stoplamp Switch
  • Underhood Fuse Block
  • CLICK HERE TO GET FULL ACCESS TO 2008 GMC Sierra 2500 HD WIRING DIAGRAMS!

    TECHNICAL SERVICE BULLETINS FOR 2008 GMC Sierra 2500 HD AUTOMOBILES

    OEM TSB listings for most 2008 GMC Sierra 2500 HD cars and light trucks sold in the U.S. from 1985+.

    Document: Second Order Prop Shaft Vibration Or Launch Shudder
    Vehicle: 2008 GMC Sierra 2500 HD WT 6.0 V8 GAS

    Symptoms:
  • Vibration
  • Document: Revised General Motors New Vehicle Tire Warranty Program
    Vehicle: 2008 GMC Sierra 2500 HD WT 6.0 V8 GAS

    Auto Systems:
  • Labor Times, Manuals, Warranty, Aids
  • Wheels, Tires, Wheel Bearings, Seals, Hubs
  • CLICK HERE TO GET FULL ACCESS TO 2008 GMC Sierra 2500 HD TECHNICAL SERVICE BULLETINS!

    COMPONENT/PARTS SPECIFICATIONS FOR 2008 GMC Sierra 2500 HD AUTOMOBILES

    BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2008 GMC Sierra 2500 HD 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 2008 GMC Sierra 2500 HD 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 2008 GMC Sierra 2500 HD 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 2008 GMC Sierra 2500 HD 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 2008 GMC Sierra 2500 HD SPECIFICATIONS DATA!

    Shop online for auto body parts, engines, wheels, lights...

    Click here to view more details2010 GMC Sierra 2500 HD Bumper Bracket, Rear, Passenger Side, A high quality, OE replacement bumper impact bar bracket; With 1-year limited TruckEFX warranty..

    Source: Auto Body Parts Store

    $22.81

    Click here to view more details about 2005 GMC Sierra 2500 HD Mirror, Driver Side2005 GMC Sierra 2500 HD Mirror, Driver Side.

    Source: Auto Body Parts Store

    $76.67

    Click here to view more details2012 GMC Terrain Aftermarket Center Caps, Aftermarket Center Caps; Chrome Finish; ABS; Set OF 4, , .

    Source: Wheels / Rims, Mirrors & Lights Store

    $63.50

    Click here to view more details2002 GMC Sierra 2500 HD V8, 6 L, 364 CID Rebuilt Engine, 6.0 V-8 Aluminum Heads, Warranty: 3-Year/100,000 Mile, .

    Source: Rebuilt Engines Store

    $2,099.00

    Click here to view more details2011 GMC Sierra 2500 HD Used Air Flow Meter/Sensor, 6.6, AUTO, 4X4 6.6L, Very Good.

    Source: Used Auto Parts Store

    $88.00

    Click here to view more details2010 GMC Sierra 2500 HD Used Fan Clutch, 5.3, AUTO, 4X2 ID GDJ, Very Good.

    Source: Used Auto Parts Store

    $62.00
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