Engine Mechanical:
Engine assembly, cylinder head, pistons, crankshaft, camshaft, timing, lubrication, cooling system
Fuel System:
Fuel injection system (TBI, MPI), fuel pump, fuel filter, fuel tank, evaporative emission control (EVAP)
Ignition System:
Distributor, ignition coils, spark plugs, ignition control module (ICM)
Emission Control:
Catalytic converter, oxygen sensors, EGR system, PCV system
Transmission Manual:
Clutch, gearbox (NV3500, NV4500), driveline components
Transmission Automatic:
4L60E, 4L80E automatic transmission repair and diagnosis
Drivetrain 4Wd:
Transfer case (NP233, NP243, NP246), front axle, CV joints
Suspension:
Front and rear suspension components, springs, shock absorbers, control arms, ball joints, bushings
Steering:
Power steering system, steering gear, tie rods, steering column
Brakes:
Front and rear disc/drum brakes, ABS system, brake lines, master cylinder, calipers, wheel cylinders
Electrical System:
Battery, charging system (alternator), starting system (starter), lighting, accessories
Instrument Panel:
Gauges, warning lights, switches, HVAC controls
Body Interior:
Door mechanisms, seat adjustments, headliner, carpet, dashboard components
Body Exterior:
Body panels, bumpers, hood, tailgate, doors, glass, mirrors, weatherstripping
HVAC System:
Air conditioning, heating, ventilation, blower motor, refrigerant system
Preventative Maintenance:
Oil changes, filter replacements, fluid checks and changes, belt inspections, spark plug replacement
Troubleshooting:
Diagnostic procedures, symptom-based troubleshooting, wiring diagrams for diagnosis
Repair Procedures:
Component removal, disassembly, inspection, repair, reassembly, and installation
Overhaul Rebuild:
Complete engine and transmission overhaul instructions
Calibration Adjustment:
Wheel alignment specifications, brake adjustments, steering system checks
Electrical Diagnostics:
Fuse and relay identification, wiring diagrams, diagnostic connector (OBD-II) interpretation
Suspension Steering Repair:
Replacement of shocks, struts, ball joints, tie rods, power steering pump and gearbox
Brake System Repair:
Pad and shoe replacement, rotor resurfacing/replacement, caliper and wheel cylinder service, ABS bleeding
Body And Trim Repair:
Panel replacement, door hinge adjustment, interior trim removal and installation
Depth:
Comprehensive, from basic maintenance to complete engine and transmission rebuilds
Detail Level:
Step-by-step instructions with accompanying diagrams and illustrations
Diagnostic Focus:
Emphasis on systematic troubleshooting and diagnostic procedures
Oil Change Interval:
Typically 3,000 miles for conventional oil, 5,000-7,500 miles for synthetic oil (consult manual for exact recommendations based on oil type and driving conditions).
Transmission Fluid Change:
Recommended every 30,000-50,000 miles for automatic transmissions, depending on usage.
Coolant Flush:
Recommended every 30,000-50,000 miles or 2-3 years.
Engine Oil Type V6:
API SG or higher. Viscosity: 5W-30 or 10W-30 depending on temperature (consult manual).
Engine Oil Type V8:
API SG or higher. Viscosity: 5W-30 or 10W-30 depending on temperature (consult manual).
Transmission Fluid Atf:
Dexron III (or equivalent/later spec like Dexron VI) for 4L60E/4L80E.
Transfer Case Fluid:
GM Auto-Trak II or equivalent for NP243/NP246.
Power Steering Fluid:
GM Power Steering Fluid or Dexron III.
Vortec Head Gaskets:
Certain Vortec V8 engines (especially earlier versions) can be prone to coolant leaks at the intake manifold gaskets or cylinder head gaskets.
ABS Sensor Failure:
ABS wheel speed sensors can fail, leading to ABS warning lights.
Window Regulator Failure:
Power window regulators can become weak or break over time.
Exhaust Manifold Leaks:
Exhaust manifold bolts can break off, causing exhaust leaks.
Heater Core Leaks:
Heater cores are known to leak, causing coolant loss and a sweet smell inside the cabin.