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2008 GMC Envoy CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT GMC REPAIR SHOPS DON'T WANT YOU TO KNOW
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- 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 Envoy 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 Envoy automobile. Try the Automotix DIY solution today!
BRAKE SERVICE PROCEDURES FOR 2008 GMC Envoy AUTOMOBILES
Hydraulic Brake Systems -> Description -> Hydraulic Control Valves -> Master Cylinder
Vehicle: 2008 GMC Envoy SLT 4.2 L6 GAS
Master Cylinder
Some vehicles use a conventional tandem master cylinder with two hydraulic pistons operating in-line. The primary piston controls the front brake system and the secondary piston controls the rear brake system.
Other models use a master cylinder that operates the same as the conventional master cylinder, but also incorporates a quick take-up feature in the rear chamber to reduce excessive pedal travel which may result from increased fluid displacement required to move the low drag caliper piston out against the rotor.
The quick take-up uses a spring-loaded ball check val...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2008 GMC Envoy AUTOMOBILES
DRIVESHAFT U-JOINT, Replace -> Assemble -> Disassemble
Vehicle: 2008 GMC Envoy Denali 5.3 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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TIRE PRESSURE MONITORING SYSTEM PROCEDURES FOR 2008 GMC Envoy AUTOMOBILES
Diagnosis & Testing -> Accessing Diagnostic Trouble Codes -> Clearing Diagnostic Trouble Codes -> Diagnostic System Check -> Diagnostic Tests -> DTC C0750 Left Front Low Tire Pressure Sensor, C0755 Right Front Low Tire Pressure Sensor, C0760 Left Rear Low Tire Pressure Sensor Or C0765 Right Rear Low Tire Pressure Sensor -> DTC C0775 Low Tire Pressure System Sensors Not Learned -> Intermittent & Poor Connections -> Intermittents -> Low Tire Pressure Indicator Fault -> Poor Connections
Vehicle: 2008 GMC Envoy SLT 4.2 L6 GAS
Accessing Diagnostic Trouble Codes
Connect a suitably programmed scan tool to Data Link Connector (DLC) and follow manufacturer's instructions.
Diagnostic Tests
Diagnostic System Check
- Inspect the vehicle for the installation of aftermarket devices which could affect the operation of the TPMS.
- Inspect the vehicle for damage or conditions which could cause the system to malfunction.
- Verify that the scan tool selected Front and Rear Tire Pressure parameters are correct when compared to the tires actual pressure ratings. If tire pressure parameters are not correct, use scan tool spec...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2008 GMC Envoy AUTOMOBILES
Starter, Replace
Vehicle: 2008 GMC Envoy SLE 4.2 L6 GAS
- Disconnect battery ground cable.
- Remove vacuum brake booster check valve from vacuum brake booster.
- Disconnect vacuum brake booster hose at engine.
- Remove vacuum brake booster hose.
- Remove battery positive lead nut and lead from solenoid.
- Remove starter solenoid S-terminal lead nut and lead ...
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MAINTENANCE LAMP RESET PROCEDURES FOR 2008 GMC Envoy AUTOMOBILES
General Motors Corp./Saturn Trucks -> Low Coolant Lamp ->
Vehicle: 2008 GMC Envoy SLE 4.2 L6 GAS
This lamp should light when engine coolant level in the radiator drops below a predetermined le...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2008 GMC Envoy AUTOMOBILES
Coolant Hose, Replace -> Lower -> Upper
Vehicle: 2008 GMC Envoy SLT 4.2 L6 GAS
Lower
- Drain cooling system into a suitable container.
- Reposition hose clamp from thermostat housing using hose clamp pliers J 38185 or equivalent.
- Remove radiator outlet hose from thermostat housing.
- Reposition hose clamp from radiator using hose clamp pliers J 38185 or equivalent.
- Remove radiator outlet hose from radiato...
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SERPENTINE BELT SERVICE PROCEDURES FOR 2008 GMC Envoy AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2008 GMC Envoy SLT 4.2 L6 GAS
- Rotate or lift the belt tensioner arm, using a suitable tool to relieve tension from drive belt.
- Remove t...
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COMPONENT LOCATION DIAGRAMS FOR 2008 GMC Envoy AUTOMOBILES
Component location diagrams for most 2008 GMC Envoy cars and light trucks sold in the U.S. from 1990+.
 Transmission Diagram for 2008 GMC Envoy Denali 5.3 V8 GASComponents on diagram: |
 Body Components Diagram for 2008 GMC Envoy SLE 4.2 L6 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 2008 GMC Envoy AUTOMOBILES
OEM drawn wiring diagrams for most 2008 GMC Envoy cars and light trucks sold in the U.S.
 2008 GMC Envoy SLT 4.2 L6 GAS Wiring DiagramComponents on diagram: |
 2008 GMC Envoy SLT 4.2 L6 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 2008 GMC Envoy AUTOMOBILES
OEM TSB listings for most 2008 GMC Envoy cars and light trucks sold in the U.S. from 1985+.
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Document: Engine Rattle Noise after R And R of the Crankshaft Balancer -Inspect Bolt Torque Vehicle: 2008 GMC Envoy SLE 4.2 L6 GAS Symptoms: |
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Document: Revised General Motors New Vehicle Tire Warranty Program Vehicle: 2008 GMC Envoy SLE 4.2 L6 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 2008 GMC Envoy AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2008 GMC Envoy 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 Envoy 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 Envoy 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 Envoy 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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