Engine:
Engine mechanical, lubrication, cooling, fuel, ignition, emissions control, engine performance diagnostics, engine overhaul
Transmission:
Manual transmission, automatic transmission (including 3T40, 4T60), clutch, drive axles, differentials
Brakes:
Front disc brakes, rear drum brakes, ABS (Anti-lock Braking System) if equipped, parking brake
Electrical:
Wiring diagrams, charging system, starting system, lighting, instrumentation, power windows, power door locks, accessories, fuse box, relays
Suspension Steering:
Front and rear suspension components, struts, shock absorbers, steering system, power steering, wheel alignment
Body Chassis:
Body construction, doors, windows, bumpers, interior trim, frame, exhaust system
HVAC:
Heating, Ventilation, and Air Conditioning (HVAC) system diagnosis and repair, refrigerant handling (R12)
Fuel System:
Fuel tank, fuel pump, fuel filter, fuel lines, fuel injectors, pressure regulator
Exhaust System:
Exhaust manifold, catalytic converter, mufflers, pipes, hangers
Maintenance:
Scheduled maintenance, oil changes, filter replacements, fluid checks and changes, tune-ups
Repair:
Engine repair, transmission overhaul, brake system repair, suspension replacement, electrical component diagnosis and repair
Troubleshooting:
Diagnostic charts, common problems and solutions, symptom-based troubleshooting guides
Diagnostics:
On-board diagnostics (OBD-I) relevant to 1991 systems, sensor testing, actuator testing
Timing Belt Chain:
Timing belt replacement for 2.0L engines, timing chain for Quad 4 engines (if applicable)
Wheel Bearing Replacement:
Front and rear wheel bearing service and replacement
Radiator Replacement:
Radiator and associated cooling system hose replacement
Depth:
Detailed procedures, specifications, torque values, diagnostic charts, wiring diagrams, overhaul instructions
Engine Rebuild:
Detailed instructions for engine disassembly, inspection, and reassembly, including piston ring and bearing replacement
Wiring Diagrams Completeness:
Full vehicle wiring diagrams with component identification and wire colors for all major electrical systems
Oil Change Interval:
Every 3,000-5,000 miles (5,000-8,000 km) or 6 months, depending on driving conditions
Spark Plug Replacement:
Approx. 30,000-60,000 miles (48,000-96,000 km), refer to manual for specific engine
Coolant Flush:
Every 2 years or 30,000 miles (48,000 km)
Engine Oil Recommendation:
API SG or SH, SAE 5W-30 or 10W-30 (refer to specific engine and climate)
Coolant Type:
Ethylene Glycol based, 50/50 mix with distilled water
Common Problems:
Engine mounts, cooling system leaks (radiator, hoses), EGR valve issues, power steering pump leaks, window regulator failures, interior trim wear
Electrical Gremlins:
Flickering dash lights, intermittent wiper operation due to aging wiring and connectors
Oil Filter Part Example:
AC-Delco PF2, Fram PH5, Wix 51085 (verify for specific engine)
