Engine:
Complete engine repair, diagnostics, overhaul, cooling system, fuel system, ignition system, lubrication system, emission control systems, engine mechanical, engine electrical.
Transmission:
Manual transmission (M22, M72, NV1500, NV3500, NV3550), Automatic transmission (4L60-E, 4L61-E, 4L70-E) service, repair, diagnostics, torque converter, valve body, internal components, fluid changes, cooler lines.
Drivetrain:
Front axle, rear axle, drive shafts, universal joints, CV joints, differentials (G80 locking differential), transfer case (NV136, NV236) service and repair.
Brakes:
Hydraulic system, ABS, brake pads, rotors, calipers, master cylinder, wheel cylinders, brake lines, parking brake, bleeding procedures.
Suspension:
Front suspension (independent, torsion bar, control arms, ball joints, tie rods, steering knuckles), Rear suspension (leaf springs, shackles, shocks), wheel alignment specifications, steering system (power steering pump, rack and pinion, steering column).
Electrical:
Battery, charging system (alternator), starting system (starter motor), lighting system (headlights, taillights, interior lights), fuses, relays, wiring diagrams, power windows, power locks, mirrors, horn, wipers, sensors.
Body And Chassis:
Frame, body panels, doors, hood, tailgate, bumpers, interior trim, seats, HVAC system, cooling and heating, A/C compressor, refrigerant, chassis lubrication.
Restraints:
Airbag system, seat belts, SRS module, diagnostic procedures for airbag system.
Emissions:
On-Board Diagnostics (OBD-II), catalytic converter, oxygen sensors, EGR system, evaporative emission control (EVAP).
Maintenance:
Oil and filter changes, fluid level checks and top-offs, tire rotation and pressure checks, air filter replacement, spark plug replacement, belt inspection and replacement, brake inspection, battery service.
Diagnostics:
Troubleshooting guides for common symptoms, DTC (Diagnostic Trouble Code) definitions and procedures, electrical system diagnostics, engine performance diagnostics, transmission diagnostics, ABS diagnostics.
Repair:
Step-by-step repair instructions for all major vehicle systems, including engine rebuilding, transmission overhaul, brake caliper replacement, suspension component replacement, exhaust system repair, body panel repair, electrical component replacement.
Troubleshooting:
Detailed troubleshooting trees and symptom-based diagnostic procedures for a wide range of vehicle issues.
Depth:
Comprehensive, from basic scheduled maintenance to complete engine and transmission rebuilds, including detailed electrical schematics and diagnostic flowcharts.
Transmission Options:
5-speed manual (NV1500, NV3500), 4-speed automatic (4L60-E, 4L61-E, 4L70-E).
Transfer Case Options:
Part-time 4WD (NV136, NV236) with electronic shift.
Automatic Transmission Features:
Electronic control, tow/haul mode.
Automatic Transmission Fluid:
Dexron VI (GM P/N 88861950 or equivalent)
Manual Transmission Fluid:
Dexron III (GM P/N 12377000 or equivalent for NV3500/NV3550)
Oil Change Interval:
Every 3,000-7,500 miles or 6 months, depending on oil type and driving conditions (consult manual for specifics).
Transmission Fluid Change Auto:
Every 45,000-100,000 miles or 4-7 years, depending on driving conditions (consult manual).
Spark Plug Replacement 2.9L:
Approx. 100,000 miles (Iridium type)
Spark Plug Replacement 3.7L:
Approx. 100,000 miles (Iridium type)
Engine Oil Type:
SAE 5W-30 (API Certified, GM approved)
Engine Oil Capacity 2.9L:
5.0 US quarts (4.7 L) with filter
Engine Oil Capacity 3.7L:
5.0 US quarts (4.7 L) with filter
Coolant Type:
Dex-Cool (GM P/N 12346290 or equivalent) - Orange colored coolant
Coolant Capacity:
Approx. 10.5 - 11.5 US quarts (9.9 - 10.9 L)
Common Problems:
Rear axle seal leaks, exhaust manifold cracks (especially 3.7L I5), front suspension component wear, evaporative emission system (EVAP) codes, occasional transmission solenoid issues.
