Engine Mechanical:
Engine assembly, disassembly, cylinder heads, crankshaft, pistons, connecting rods, camshafts, timing systems, lubrication, cooling.
Engine Management:
Fuel injection systems, ignition systems, emissions control, engine control module (ECM) diagnostics, sensors, actuators.
Transmission:
Automatic transmission (e.g., 4L60E, 4L65E, 5L40E, 6L80E), manual transmission (if applicable), clutch, torque converter, transmission control module (TCM).
Drivetrain:
Driveshafts, differentials, axles, CV joints, wheel bearings.
Suspension Steering:
Front and rear suspension systems, shock absorbers, springs, control arms, bushings, steering gear, power steering system, alignment specifications.
Brakes:
Front and rear brake systems (disc brakes), ABS, EBD, brake fluid specifications, hydraulic components, parking brake.
Electrical Charging:
Battery, alternator, starter motor, charging system diagnostics.
Electrical Lighting:
Headlights, taillights, interior lighting, fog lights, electrical schematics.
Electrical Accessories:
Power windows, power locks, mirrors, wipers, horn, infotainment system wiring.
Body Electronics:
Body Control Module (BCM), instrument cluster, airbag system (SRS), comfort features.
HVAC:
Air conditioning system, heating system, ventilation, blower motor, refrigerant, cabin filter replacement.
Body Panels:
Body panel removal and installation, door mechanisms, trunk lid, hood.
Interior Trim:
Interior trim panel removal and installation, seating systems, dashboard assembly.
Scheduled Maintenance:
Oil changes, filter replacements, fluid checks and top-offs, belt inspections, spark plug replacement, brake pad inspection, tire rotation.
Engine Repair:
Complete engine rebuild procedures, cylinder head gasket replacement, piston ring replacement, bearing replacement, valve servicing.
Transmission Repair:
Transmission fluid and filter change, torque converter replacement, valve body diagnosis and repair, seal replacement.
Brake Service:
Brake pad and rotor replacement, caliper servicing, bleeding the brake system, ABS component testing.
Suspension Steering Repair:
Shock absorber and strut replacement, control arm bushing replacement, power steering pump replacement, tie rod end replacement.
Electrical Diagnostics:
Troubleshooting wiring issues, diagnostic trouble code (DTC) interpretation, sensor testing, actuator testing, multimeter usage.
HVAC Service:
Refrigerant system evacuation and recharge, component replacement (compressor, evaporator, condenser), leak detection.
Body Repair:
Door hinge adjustment, lock mechanism repair, window regulator replacement, panel alignment.
Troubleshooting Guides:
Systematic diagnostic flowcharts for common and uncommon problems.
Diagnostic Capability:
Advanced diagnostics using specialized tools and interpretation of sensor data.
Rebuild Procedures:
Detailed instructions for complete engine and transmission rebuilds.
Schematics Diagrams:
Comprehensive electrical wiring diagrams and system schematics.
Torque Specifications:
Precise torque values for all critical fasteners.
Tolerances Clearances:
Specifications for internal engine and transmission component clearances.
Special Tools:
Identification and usage of required specialized tools for specific repair procedures.
Oil Change Interval:
Typically 10,000 km or 6-12 months, whichever comes first (refer to manual for specific engine variant).
Major Service Interval:
Refer to manual for specific checks at 40,000km, 80,000km, 120,000km etc. (e.g., spark plugs, coolant, transmission fluid).
Engine Oil Spec:
API SN/SM or ACEA A3/B4, SAE 5W-30 or 10W-30 (depending on engine and climate, consult manual for exact specification).
Coolant Spec:
GM-spec Dex-Cool (Orange) or equivalent OAT coolant, 50/50 mix with deionized water.
Transmission Fluid Spec:
Dexron VI for 6-speed autos, Dexron III/VI for earlier autos. Check manual for specific transmission.
Common Issues:
Vibrations from driveshaft/tailshaft, worn suspension bushings, minor electrical gremlins, transmission shift quality issues (early models), intake manifold gasket leaks (some V6 variants).