Engine Mechanical:
Full engine disassembly, inspection, repair, and assembly for all gasoline and diesel variants.
Engine Fuel System:
Fuel injection systems (TBI, MPI), fuel pumps, lines, filters, and evaporative emission controls.
Engine Cooling System:
Radiator, water pump, thermostat, hoses, coolant specifications, and fan clutch.
Engine Ignition System:
Distributor, spark plugs, ignition wires, coil, and ignition control module.
Engine Lubrication System:
Oil pump, oil filter, oil pan, oil pressure specifications, and fluid types.
Exhaust System:
Exhaust manifold, catalytic converter, muffler, pipes, and gaskets.
Transmission Automatic:
GM 4L80-E and 4L60-E: disassembly, assembly, torque converter, valve body, diagnostics, and fluid specifications.
Transmission Manual:
NV4500 Heavy Duty Manual Transmission: disassembly, assembly, clutch, flywheel, and fluid specifications.
Transfer Case:
NP205, NP241: operation, maintenance, and repair procedures.
Drivetrain Axles:
Front and rear axle assemblies, differentials, drive shafts, U-joints, and wheel bearings.
Suspension Front:
Independent Front Suspension (IFS), control arms, ball joints, springs, shocks, and steering knuckles.
Suspension Rear:
Leaf spring suspension, shock absorbers, and axle mounting.
Steering System:
Power steering pump, steering gear, tie rods, idler arm, and steering column.
Brake System Front:
Disc brakes: calipers, rotors, pads, brake lines, and fluid specifications.
Brake System Rear:
Drum brakes: wheel cylinders, shoes, drums, brake lines, and parking brake.
Electrical System Charging:
Alternator, voltage regulator, battery, and wiring.
Electrical System Starting:
Starter motor, solenoid, and ignition switch.
Electrical System Lighting:
Headlights, taillights, interior lighting, and bulb specifications.
Electrical System Accessories:
Power windows, door locks, mirrors, wipers, horn, and trailer wiring.
HVAC System:
Air conditioning compressor, condenser, evaporator, heater core, blower motor, and controls.
Body Exterior:
Body panel removal and installation, doors, hood, tailgate, bumpers, and trim.
Body Interior:
Dashboard, seats, carpets, headliner, door panels, and interior trim.
Chassis And Frame:
Frame inspection, repair, and component mounting.
Diagnostics:
OBD-I diagnostic trouble codes, symptom-based diagnostics, and troubleshooting flowcharts.
Scheduled Maintenance:
Detailed procedures for oil changes, filter replacements, fluid checks, tire rotations, and tune-ups.
Engine Repair:
Complete engine rebuild procedures, including cylinder head overhaul, piston and ring replacement, and bearing installation.
Transmission Service:
Automatic and manual transmission fluid changes, filter replacement, and internal component repair.
Brake Service:
Brake pad/shoe replacement, rotor/drum resurfacing or replacement, caliper/wheel cylinder rebuilding, and brake bleeding.
Suspension And Steering Repair:
Ball joint, tie rod, control arm, shock absorber, and steering gear replacement.
Electrical Diagnostics:
Wiring diagrams, component testing, troubleshooting shorts, open circuits, and intermittent faults.
HVAC Repair:
AC system recharging, leak detection, component replacement (compressor, dryer, expansion valve), and heater core replacement.
Body And Trim Repair:
Panel alignment, rust repair, dent removal, and trim piece replacement.
Troubleshooting Guides:
Systematic troubleshooting for common problems and drivability issues.
Depth:
Comprehensive: Covers everything from basic fluid changes to full engine and transmission overhauls, including detailed electrical diagnostics and bodywork.
Oil Change Interval:
Typically every 3,000-5,000 miles or 6 months (check manual for specific engine/oil type).
Transmission Fluid Change:
Every 30,000-50,000 miles for automatic transmissions, check manual for manual transmission intervals.
Coolant Flush:
Every 30,000-50,000 miles or 2-3 years.
Engine Oil Type:
API SG or SH certified, SAE 5W-30, 10W-30, or 10W-40 depending on temperature (refer to manual for exact recommendations).
Automatic Transmission Fluid:
Dexron III (or equivalent).
Manual Transmission Fluid:
GL-4 gear oil (e.g., SAE 75W-90 or 80W-90 for NV4500).
Coolant Type:
Ethylene Glycol based, typically a green coolant. Check manual for specific type and mixture ratio.
Common Issues Diesel:
Potential issues with PMD (Pump Mounted Driver) on 6.5L TD, injector pump failures, intake manifold heater failures.
Common Issues Gasoline:
TBI/MPI sensor failures (e.g., TPS, MAP), intake manifold gasket leaks, exhaust manifold cracks.
Common Issues Drivetrain:
U-joint wear, differential seal leaks, transmission cooler line leaks.
Common Issues Suspension:
Wear in ball joints, control arm bushings, and steering components due to heavy use.