Engine Mechanical:
Engine assembly, cylinder head, block, pistons, crankshaft, camshafts, valve train, timing belt/chain, cooling system, lubrication system, fuel injection (EFI), ignition system, exhaust system.
Engine Management:
ECU operation, sensor diagnostics (MAP, TPS, O2, ECT, CKP, CMP), actuator control, OBD-II diagnostic trouble codes (DTCs) and troubleshooting.
Transmission Manual:
Gearbox disassembly and assembly, clutch system, shift mechanism, lubrication, common faults.
Transmission Automatic:
ATF specifications, torque converter, hydraulic control system, valve body, planetary gear sets, common faults.
Chassis Suspension:
Front suspension (McPherson struts), rear suspension (multi-link/torsion beam variations), shock absorbers, springs, bushings, alignment specifications.
Brakes:
Front and rear brake systems (disc/drum configurations), ABS system (if equipped), brake fluid specifications, bleeding procedures, component replacement (pads, rotors, calipers, master cylinder).
Steering:
Power steering system (hydraulic), steering rack, tie rods, power steering fluid specifications, pump and rack replacement.
Electrical System:
Battery, charging system (alternator, regulator), starting system (starter motor), lighting system (headlights, taillights, interior), fuses, relays, wiring diagrams, component testing.
HVAC:
Air conditioning system (refrigerant type, charging), heater core, blower motor, climate controls, cabin air filter replacement.
Body And Trim:
Exterior body panels, interior trim components, door mechanisms, glass replacement, bumpers, seals.
Safety Systems:
Airbag system (SRS) component location, diagnosis, and replacement precautions; seatbelt mechanisms.
Routine Maintenance:
Oil changes, filter replacements (oil, air, fuel, cabin), spark plug replacement, coolant flush, brake fluid replacement, power steering fluid flush, transmission fluid changes.
Diagnostic Troubleshooting:
Step-by-step guides for diagnosing common drivability issues, electrical faults, HVAC problems, and suspension noises using diagnostic codes and logical testing sequences.
Component Replacement:
Detailed instructions for replacing major and minor components such as starters, alternators, fuel pumps, radiators, water pumps, thermostats, brake calipers, wheel bearings, CV joints, exhaust components, engine mounts, and suspension parts.
Engine Rebuild:
Full engine disassembly, inspection, measurement, and reassembly procedures, including torque specifications for critical fasteners.
Transmission Overhaul:
Detailed steps for disassembling, inspecting, repairing, and reassembling both manual and automatic transmissions.
Electrical Repairs:
Wiring diagram interpretation, circuit tracing, connector repair, and sensor/actuator testing and replacement.
Bodywork And Interior:
Body panel alignment, minor dent repair guidance, door handle and lock mechanism repair, window regulator replacement.
Depth Level:
Comprehensive (covers everything from basic maintenance to full engine and transmission rebuilds)
Detail Level:
OEM-level technical detail, including specifications, tolerances, and diagnostic procedures.
Diagnostic Capability:
Supports advanced diagnostics, including use of scan tools and interpretation of diagnostic trouble codes (DTCs).
Engine Code 1 5L:
G15MF (GM Family I)
Engine Displacement 1 5L:
1498 cc (1.5 Liters)
Engine Configuration 1 5L:
Inline-4, SOHC (Single Overhead Camshaft)
Engine Bore Stroke 1 5L:
76.5 mm x 82.0 mm (approx.)
Engine Compression Ratio 1 5L:
9.2:1 (approx.)
Engine Horsepower 1 5L:
90-96 hp @ 6000 rpm (varies by market and tune)
Engine Torque 1 5L:
125-130 Nm @ 3200 rpm (varies by market and tune)
Engine Code 1 8L:
C18SED (GM Family II/Opel derived)
Engine Displacement 1 8L:
1796 cc (1.8 Liters)
Engine Configuration 1 8L:
Inline-4, DOHC (Double Overhead Camshaft)
Engine Bore Stroke 1 8L:
80.5 mm x 88.2 mm (approx.)
Engine Compression Ratio 1 8L:
9.2:1 (approx.)
Engine Horsepower 1 8L:
110-115 hp @ 6000 rpm (varies by market and tune)
Engine Torque 1 8L:
150-158 Nm @ 3400 rpm (varies by market and tune)
Fuel Delivery:
Multi-point Fuel Injection (MPI / EFI)
Fuel Type:
Unleaded Gasoline (Octane rating varies by market, typically 91 RON recommended)
Ignition System:
Distributorless Ignition System (DIS) or Distributor-based system depending on year/market, Electronic Ignition (EI).
Engine Oil Change:
Every 7,500 - 10,000 miles or 6-12 months, whichever comes first, depending on driving conditions and oil type used.
Oil Filter Replacement:
With every oil change.
Air Filter Replacement:
Every 15,000 - 20,000 miles or as needed based on visual inspection.
Fuel Filter Replacement:
Every 30,000 - 40,000 miles, or if fuel delivery issues arise.
Spark Plug Replacement:
Every 60,000 - 100,000 miles for platinum or iridium plugs (depending on type specified).
Timing Belt Replacement:
Crucial for interference engines: typically every 60,000 - 90,000 miles or 5-7 years. Consult manual for specific engine code.
Coolant Flush Replacement:
Every 30,000 - 50,000 miles or 2-3 years. Use correct coolant type.
Brake Fluid Replacement:
Every 2-3 years or 30,000 - 40,000 miles.
Engine Oil Type:
API SJ or SL rated, SAE 5W-30 or 10W-40 (viscosity depends on climate). Consult manual for exact spec.
Engine Oil Capacity:
Approx. 3.5 - 4.0 liters (without filter change), 4.0 - 4.5 liters (with filter change).
Coolant Type:
GM-spec silicate-free, long-life coolant (typically blue or green). Mix 50/50 with distilled water.
Automatic Transmission Fluid:
GM Dexron III or equivalent.
Manual Transmission Fluid:
API GL-4, SAE 75W-90 or 80W-90 gear oil.
Power Steering Fluid:
GM Power Steering Fluid or Dexron II/III ATF.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid.
Engine Oil Leaks:
Common issues include leaking valve cover gaskets and crankshaft seals, particularly on higher mileage vehicles.
Cooling System Faults:
Radiator leaks, thermostat failures, and aging hoses are common. Overheating can lead to head gasket issues.
Suspension Wear:
Worn ball joints, tie rod ends, and bushings in the suspension can lead to noise and handling problems.
Electrical Gremlins:
Corrosion on electrical connectors, failing window regulators, and intermittent dashboard warning lights can occur.
Automatic Transmission Problems:
Some automatic transmissions may experience delayed shifts or slipping if fluid is not maintained.
Exhaust System Corrosion:
Rusting of the exhaust pipes, muffler, and catalytic converter is common in corrosive climates.
