Segment:
Full-size SUV, known for its utility, towing capacity, and passenger space.
Competitors:
Ford Expedition, Dodge Durango, Toyota Sequoia, Nissan Pathfinder (older models).
Usp:
Durability, spacious interior, strong V8 engine options, robust towing capabilities, extended-wheelbase practicality.
Engine Mechanical:
Engine assembly, cylinder heads, pistons, crankshaft, camshaft, timing systems, lubrication, cooling.
Engine Performance:
Fuel delivery, ignition system, emission controls, turbocharging/supercharging (if applicable to specific trims).
Transmission Drivetrain:
Automatic and manual transmission overhaul, transfer case, drive shafts, differentials, axles.
Brakes:
Disc and drum brake systems, ABS, parking brake, hydraulic components.
Steering Suspension:
Power steering, steering columns, rack and pinion/steering gear, front and rear suspension systems, shock absorbers, springs.
Electrical System:
Battery, charging system, starter, lighting, power windows, door locks, mirrors, wipers, horn, fuses, relays.
HVAC:
Heating, ventilation, and air conditioning systems, components, and troubleshooting.
Body Exterior:
Body panels, doors, latches, glass, trim, bumpers, tailgate, roof rack.
Body Interior:
Seats, dashboard, interior trim, carpeting, headliner, safety belts, airbags.
Diagnostic Troubleshooting:
Wiring diagrams, diagnostic trouble codes (DTCs), component testing procedures, symptom-based troubleshooting guides.
Maintenance:
Oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt inspection and replacement, tire rotation.
Repair Overhaul:
Engine rebuild, transmission overhaul, brake caliper replacement, suspension component replacement, electrical component repair/replacement.
Installation Adjustment:
Component installation (e.g., alternator, water pump), alignment procedures, system adjustments.
Bodywork:
Dent repair, panel replacement, glass replacement, rust prevention and repair.
Depth:
Comprehensive from basic preventative maintenance to full engine and transmission rebuilds, including electrical diagnostics.
Oil Change Interval:
Every 3,000-5,000 miles (5,000-8,000 km) or 3-6 months, or as indicated by the oil life monitoring system if equipped.
Engine Coolant Flush:
Initial change at 100,000 miles (160,000 km), then every 50,000 miles (80,000 km) or 5 years. (Refer to manual for exact type).
Transmission Fluid Change:
Every 30,000-50,000 miles (48,000-80,000 km) or if towing frequently. Manual will specify exact interval and procedure.
Engine Oil Type:
SAE 5W-30 synthetic blend or synthetic oil meeting GM specification GM6094M.
Engine Oil Capacity:
4.5 quarts (4.2 liters) with filter for 5.3L, 6 quarts (5.7 liters) with filter for 6.0L. (Verify in manual).
Coolant Type:
GM specified orange coolant (50/50 mix with distilled water).
Common Problems Area 1:
Intake manifold gaskets (coolant leaks), rear main seal leaks, front differential pinion seal leaks (especially on AWD models).
Common Problems Area 2:
Actuator for 4WD system (Autotrac) can fail, leading to non-engagement of front drive.
Common Problems Area 3:
Fuel pump module wear, HVAC blend door actuator failures, window motor/regulator issues.
