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2008 GMC Sierra Denali 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!Select Section
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- Technical Service Bulletins
- Specifications
- Brake Service
- Driveline, U-Joint & CV Axles Replacement
- Tire Pressure Monitoring System
- Starter & Alternator Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
- Serpentine Belt Service
Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 2008 GMC Sierra Denali 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 Denali automobile. Try the Automotix DIY solution today!
BRAKE SERVICE PROCEDURES FOR 2008 GMC Sierra Denali AUTOMOBILES
Disc Brakes -> Delco Dual Piston Sliding Caliper -> Troubleshooting -> Brake Rattle -> Brake Roughness Or Chatter; Pedal Pumping -> Caliper Brake Fluid Leak -> Excessive Pedal Effort -> Excessive Pedal Travel -> Heavy Brake Drag -> No Braking Effect When Brake Pedal Is Depressed -> Pull, Uneven Or Grabbing Brakes -> Rear Brakes Locking On Application
Vehicle: 2008 GMC Sierra Denali 6.2 V8 GAS
Excessive Pedal Travel
- Worn brake linings.
- Disc pads knock back after cornering or rough road travel.
- Piston and linings not properly seated or positioned.
- Insufficient fluid in system.
- Loose wheel bearing adjustment.
- Damaged or worn caliper piston seal.
- Improper booster pushrod adjustment.
- Pads out of flat more than .005 inch.
- Rear brake automatic adjusters inoperative.
- Improperly ground rear brake shoes.
Brake Roughness Or Chatter; Pedal Pumping
- Excessive lateral runout of rotor.
- Rotor excessively out of parallel.
Excessive Pedal Effort
- Frozen or seized pistons.
- Brake fluid, oil or grease on ...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2008 GMC Sierra Denali AUTOMOBILES
CV AXLE SHAFT, Replace
Vehicle: 2008 GMC Sierra Denali 6.2 V8 GAS
- 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 s...
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TIRE PRESSURE MONITORING SYSTEM PROCEDURES FOR 2008 GMC Sierra Denali AUTOMOBILES
Component Replacement -> Installation -> Removal -> Tire Pressure Sensor (Snap In Style)
Vehicle: 2008 GMC Sierra Denali 6.2 V8 GAS
Tire Pressure Sensor (Snap In Style)
Each tire pressure sensor has an internal power supply which has a service life of 10 years.
Removal
- Loosen the lug nuts.
- Raise and support vehicle with jack stands, then remove the wheel and tire assembly.
- Prior to dismounting the tire from the wheel, note the following precautions:
- Position the bead breaking fixture 90, 180 and 270° from the valve stem when Separating the tire bead from the wheel.
- Position the wheel and tire so the valve stem is situated at the 2 o'clock position relative to the head. The tire iron or pry bar can be inserted...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2008 GMC Sierra Denali AUTOMOBILES
Alternator, Replace
Vehicle: 2008 GMC Sierra Denali 6.2 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 Denali AUTOMOBILES
General Motors Corp./Saturn Trucks -> Anti-Lock Brake System Warning Lamp ->
Vehicle: 2008 GMC Sierra Denali 6.2 V8 GAS
This lamp should light for approximately 6-8 seconds when the ignition is turned On as a bulb check. If the warn...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2008 GMC Sierra Denali AUTOMOBILES
Radiator, Replace
Vehicle: 2008 GMC Sierra Denali 6.2 V8 GAS
- Drain radiator coolant into suitable container.
- Remove upper and lower radiator hoses.
- Remove mounting bolts and lower fan shroud.
- Remove engine vent hose and surge take hose.
- Disconnect engine o...
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SERPENTINE BELT SERVICE PROCEDURES FOR 2008 GMC Sierra Denali AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2008 GMC Sierra Denali 6.2 V8 GAS
- Remove air cleaner outlet duct.
- Rotate tensioner clockwise to release belt tension using breaker bar with hex-head socket, then remove drive belt.
- If replacing A/C drive belt, rotate tensioner clockwise to release belt tension using breaker bar or ratchet, then remove belt.
- Clean and inspect belt su...
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COMPONENT LOCATION DIAGRAMS FOR 2008 GMC Sierra Denali AUTOMOBILES
Component location diagrams for most 2008 GMC Sierra Denali cars and light trucks sold in the U.S. from 1990+.
 Instrument Panel Diagram for 2008 GMC Sierra Denali 6.2 V8 GASComponents on diagram: |
 Fuel Pump and Sender Assembly Diagram for 2008 GMC Sierra Denali 6.2 V8 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 2008 GMC Sierra Denali AUTOMOBILES
OEM drawn wiring diagrams for most 2008 GMC Sierra Denali cars and light trucks sold in the U.S.
 2008 GMC Sierra Denali 6.2 V8 GAS Wiring DiagramComponents on diagram: |
 2008 GMC Sierra Denali 6.2 V8 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 2008 GMC Sierra Denali AUTOMOBILES
OEM TSB listings for most 2008 GMC Sierra Denali cars and light trucks sold in the U.S. from 1985+.
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Document: EI07082-Power Steering Fluid Leaking from Power Steering Gear/Rack Assembly Vehicle: 2008 GMC Sierra Denali 6.2 V8 GAS Symptoms: |
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Document: Second Order Prop Shaft Vibration Or Launch Shudder Vehicle: 2008 GMC Sierra Denali 6.2 V8 GAS Symptoms: |
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COMPONENT/PARTS SPECIFICATIONS FOR 2008 GMC Sierra Denali AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2008 GMC Sierra Denali 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 Denali 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 Denali 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 Denali 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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