Engine Mechanical:
Engine assembly, cylinder head, block, pistons, connecting rods, crankshaft, camshaft, valvetrain, lubrication system, cooling system, fuel system, ignition system, exhaust system, emissions control.
Engine Performance:
Diagnosis and testing of engine control module (ECM), sensors (MAF, MAP, O2, Crankshaft Position, Camshaft Position, Knock), actuators (injectors, ignition coils), fuel delivery and ignition timing.
Transmission:
Automatic transmission (4L80-E, 4L85-E) disassembly, assembly, diagnosis, and repair. Hydraulic system, torque converter, valve body, electronic controls, fluid specifications, and service.
Drivetrain:
Front and rear axle assembly, differential, drive shafts, U-joints, wheel bearings, four-wheel drive system (transfer case) operation, diagnosis, and repair.
Suspension Steering:
Front and rear suspension components (control arms, ball joints, bushings, springs, shocks/struts), steering gear, power steering system, steering column, wheel alignment specifications.
Brakes:
Front and rear brake systems (disc and drum), anti-lock braking system (ABS) components, hydraulic lines, calipers, rotors, pads, parking brake system, diagnosis, bleeding procedures, and specifications.
Electrical Lighting:
Wiring diagrams, electrical component locations, lighting system (headlights, taillights, interior lights), charging system (alternator, battery), starting system (starter motor), fuses, relays, and circuit protection.
HVAC:
Heating, ventilation, and air conditioning (HVAC) system components, refrigerant charging, compressor, condenser, evaporator, blower motor, diagnosis, and repair.
Body Chassis:
Body panels, doors, hood, tailgate, bumpers, interior trim, glass, seals, chassis lubrication, frame inspection, and repair.
Diagnostic Troubleshooting:
Comprehensive diagnostic procedures, fault code interpretation (OBD-II), troubleshooting trees, and symptom-based diagnostics.
Maintenance:
Scheduled maintenance, oil changes, filter replacements, tune-ups, fluid checks and top-offs, tire rotation and pressure checks.
Repair:
Step-by-step repair instructions for all major mechanical and electrical components.
Disassembly Assembly:
Detailed instructions for removing and reinstalling components, including torque specifications.
Troubleshooting:
Systematic methods for diagnosing and resolving common and complex problems.
Wiring Diagrams:
Complete and detailed electrical wiring schematics for all vehicle systems.
Depth:
Comprehensive coverage from basic maintenance to advanced diagnostics and complete engine/transmission rebuilds.
Oil Change Interval:
Every 7,500 miles or 6 months (synthetic blend oil recommended).
Air Filter Replacement:
Every 30,000 miles or as needed based on operating conditions.
Spark Plug Replacement:
7.5L V8: 100,000 miles; 5.3L V8: 100,000 miles (iridium plugs).
Transmission Fluid Change:
Every 50,000 miles under severe towing/hauling conditions, otherwise check at 100,000 miles.
Engine Oil Type:
API Service SG, SH, SJ, SL or SAE 5W-30 or 5W-40 (per manual for specific engine).
Engine Oil Capacity 5.3L:
7.0 quarts (6.6 liters) with filter.
Engine Oil Capacity 6.0L:
7.0 quarts (6.6 liters) with filter.
Engine Oil Capacity 8.1L:
9.0 quarts (8.5 liters) with filter.
Transmission Fluid Type:
Dexron-III (or equivalent).
Coolant Type:
Dex-Cool (orange) Extended Life Antifreeze/Coolant.
Common Problem 1:
Intake manifold gasket leaks (especially on 5.3L).
Common Problem 2:
Cracked exhaust manifolds (particularly on 5.3L and 6.0L).
Common Problem 3:
Transmission issues (e.g., torque converter shudder, solenoid problems) in 4L80-E/4L85-E, especially with heavy use.
Common Problem 4:
Fuel pump failures.
Common Problem 5:
Corrosion on electrical connectors, especially ground points.
