Engine Service:
Complete engine overhaul, diagnostics, and repair
Control System:
Engine control, powertrain control module (PCM) diagnostics
Mechanical Systems:
Detailed mechanical component repair procedures
Fuel Service:
Fuel system diagnostics, component replacement, specifications
Emission Control:
Emission system diagnostics, components, and testing
Cooling System:
Radiator, water pump, thermostat, fan, coolant specifications
Lubrication System:
Oil pump, oil filter, lubrication schedules, fluid specifications
Ignition Charging Starting:
Battery, alternator, starter motor, ignition system diagnostics and repair
Automatic Transmission:
Service, repair, and diagnostics for automatic transmissions
Manual Transmission:
Service, repair, and diagnostics for manual transmissions
Transfer Case:
Service and repair for 2WD and 4WD transfer cases
Drive Shaft Axle:
Drive shaft, U-joints, CV joints, axle service and repair
Differential:
Front and rear differential service, specifications, and repair
Suspension Steering:
Front and rear suspension, steering system diagnostics and repair
Tire Wheel:
Wheel alignment, tire balancing, specifications
Brake System:
Front and rear brake service, ABS diagnostics, hydraulic system repair
Parking Brake:
Parking brake system service and adjustment
Steering Column:
Steering column components, ignition switch repair
Power Steering:
Power steering pump, rack, fluid specifications
Air Conditioning:
AC system service, recharge, component replacement
Supplemental Restraint System:
Airbag system diagnostics and service (SRS)
Seat Belts:
Seat belt system inspection and service
Engine Immobilizer:
Immobilizer system diagnostics and troubleshooting
Cruise Control:
Cruise control system diagnostics and repair
Wiper Washer:
Wiper and washer system repair, fluid specifications
Door Locks:
Door lock mechanisms, power locks, and keyless entry
Meter Audio Visual:
Instrument cluster, gauges, audio system service
Horn:
Horn system repair and troubleshooting
Windshield Glass Mirror:
Windshield, glass, and mirror replacement and service
Instrument Panel:
Instrument panel removal, installation, and component repair
Seats:
Seat adjustment mechanisms, seat trim repair
Engine Hood Door:
Hood, door, tailgate, latches, and hinges repair
Exterior Interior:
Exterior trim, interior trim, body panel repair and replacement
Electrical System:
Complete vehicle electrical system diagrams, troubleshooting, component testing
Multiplex Can Communication:
Diagnostics and troubleshooting for multiplex and CAN communication systems
Maintenance Procedures:
Routine maintenance, inspections, fluid changes, filter replacements
Diagnostic Procedures:
Step-by-step diagnostic troubleshooting guides for all systems
Repair Procedures:
Detailed instructions for component removal, installation, and repair
Rebuilding Procedures:
Comprehensive procedures for rebuilding major components (engine, transmission, etc.)
Wiring Schematics:
Complete vehicle wiring diagrams for all electrical systems
Depth:
Vehicle-specific, factory-level detail for technicians and serious DIYers
Oil Change Interval:
Typically 3,000-5,000 miles or 3-6 months, depending on driving conditions (refer to specific manual for exact recommendations)
Engine Oil Specification:
API SG or SH, SAE 5W-30 or 10W-30 (check owner's manual for climate variations)
Coolant Specification:
Ethylene glycol based antifreeze, typically a 50/50 mix with distilled water
Transmission Fluid Automatic:
Dexron III (or equivalent) automatic transmission fluid
Brake Fluid:
DOT 3 brake fluid
Common Sonoma Issues 1997:
Potential for intake manifold gasket leaks (V6), fuel pump failures, rust on body panels (especially around wheel wells and cab corners), and occasional issues with power windows/locks.
