Engine Mechanical:
Engine assembly, cylinder head, block, crankshaft, pistons, connecting rods, lubrication system, cooling system, exhaust system, emissions.
Engine Performance:
Fuel injection, ignition system, electronic engine controls (ECM), turbocharging (if applicable), diagnostics.
Transmission:
Automatic transmission (4L60-E, 4L70-E), manual transmission (NV3500, NV4500), transfer case (NP1, NP2, NP3), driveline, differentials.
Brakes:
Hydraulic system, ABS, EBD, disc brakes (front and rear), drum brakes (rear on some models), parking brake, brake fluid specifications.
Steering:
Power steering system, steering column, steering gear, tie rods, alignment specifications.
Suspension:
Front suspension (independent), rear suspension (leaf springs), shock absorbers, springs, ball joints, control arms, stabilizer bars, wheel bearing specifications.
Electrical System:
Battery, charging system (alternator), starting system (starter), lighting, instrumentation, power distribution, fuses, relays, wiring diagrams.
HVAC:
Air conditioning system, heating system, ventilation, climate control, refrigerant types and capacities, system diagnostics.
Body And Chassis:
Frame, body panels, doors, windows, glass, interior trim, exterior trim, bumpers, tailgate, bed components.
Safety Systems:
Airbags, seat belts, tire pressure monitoring system (TPMS), anti-theft system.
Maintenance Procedures:
Oil changes, filter replacements, fluid checks and changes (coolant, brake, power steering, transmission, differential), tire rotation, tune-ups.
Repair Procedures:
Engine component replacement (e.g., gaskets, belts, water pump), transmission service, brake component replacement, suspension work, steering system repairs, electrical component diagnosis and replacement.
Troubleshooting:
Diagnostic trouble codes (DTCs), symptom-based diagnostics, common problem identification and solutions.
Diagnostics:
On-board diagnostics (OBD-II), scan tool usage, sensor testing, actuator testing, wiring harness testing.
Technical Depth:
Factory-level diagnostics, repair procedures, specifications, and technical service bulletins (TSBs).
Diagnostic Tools Required:
Information on specific scan tools, multimeters, pressure gauges, and alignment equipment.
Oil Change Interval:
7,500 miles or 6 months (normal driving), 5,000 miles or 3 months (severe driving)
Air Filter Replacement:
15,000 - 30,000 miles (depending on driving conditions)
Spark Plug Replacement:
100,000 miles (for platinum-tipped plugs)
Engine Oil Type:
SAE 5W-30 Synthetic (meeting GM spec GM6094M)
Coolant Type:
GM Gen II DEX-COOL (Orange)
Power Steering Fluid:
GM Power Steering Fluid (or Dexron III/VI compatible)
Common Problems:
Active Fuel Management (AFM) lifter issues (4.8L/5.3L V8), transmission solenoid issues (4L60-E/4L70-E), exhaust manifold leaks, wheel bearing failures, evaporative emission control (EVAP) system leaks.
