OEM parts categories for 2004 Chevrolet Silverado 2500 HD 2WD: Body Mounting, Air Conditioning, Audio/Entertainment (A/C & Heater Control Assembly, A/C & Heater Module Assembly, A/C Compressor Assembly, A/C Compressor Mounting, A/C Refrigeration System, Air Distribution System/Front, Air Distribution System/Module Mounting, Antenna/Audio, Antenna/Digital Audio, Audio System/Front, Audio System/Rear, Audio System/Rear Speakers, Body Mounting, Communication System, Communication System-Communication Interface Module, Entertainment System, Fire Extinguisher Bracket, Sensor/Temperature Ambient) | Brakes (Brake Booster & Master Cylinder Mounting, Brake Booster/Hydraulic, Brake Caliper Mounting/Front & Knuckle, Brake Caliper/Front, Brake Caliper/Rear, Brake Control Module, Brake Electrical System Module & Harness, Brake Lines-Pipe Kit, Brake Lines/Front, Brake Lines/Intermediate, Brake Lines/Rear, Brake Master Cylinder, Brake Pedal, Parking Brake Assembly, Parking Brake System) | Brakes, Rear Axle, Propeller Shaft, Wheels, Tires (Axle Assembly/Rear, Axle Assembly/Rear Locking Differential, Prop Shaft, Prop Shaft Mounting/Rear Axle, Rear Axle Vent Hose, Wheels & Hub Caps) | Cab And Body Structure, Mirrors, Doors, Trim, Seat Belts, Wipers (Console/Floor, Console/Roof, Door Hardware-Pin Kits, Door Hardware/Side Front, Door Hardware/Side Rear, Door Trim/Side Front-Driver, Door Trim/Side Front-Passenger, Door Trim/Side Rear, Driver Seat/Bucket, Driver Seat/Split Bench, Entry System/Keyless Remote, Floor Covering & Related Parts, Front Center Seat/Split Bench, Inflatable Restraint System, Instrument Panel & Related Parts Supports, Instrument Panel & Related Parts-Electrical, Instrument Panel & Related Parts-Trim, Insulators/Dash Panel, Lock Cylinder/Side Door, Mirror/Outside Rear View, Passenger Seat/Bucket, Passenger Seat/Split Bench, Plugs/Body, Rear Seat/Folding, Rear Seat/Folding-Side, Seat Belts-Rear, Seat Belts/Front, Seat Belts/Rear Bench, Sheet Metal/Body, Sheet Metal/Body Side And Rear, Sheet Metal/Cowl, Sheet Metal/Roof, Sheet Metal/Underbody, Trim/Interior-Body Side, Trim/Interior-Roof, Windows-Body Side, Windows-Rear, Windshield & Related Parts, Wiper System/Windshield) | Cooling System, Grille, Oil System (Cover/Radiator, Engine Block Heater, Engine Coolant Fan & Clutch, Engine Cooling System Sensor & Bracket, Engine Oil Cooler And Lines, Grille/Radiator, Pulleys & Belts/Accessory Drive, Radiator Assembly, Radiator Hoses, Radiator Mounting & Related Parts, Radiator Support) | Engine (Clutch, Clutch Pedal & Cylinders, Engine & Transmission Mounting, Engine Assembly & Partial Engine, Engine Assembly-Camshaft & Valves, Engine Assembly-Cooling Pump & Related Parts, Engine Assembly-Cylinder Block & Related Parts, Engine Assembly-Cylinder Head & Related Parts, Engine Assembly-Front Cover & Cooling & Related Parts, Engine Assembly-Front Cover, Oil Pump, Pan & Related Parts, Engine Assembly-Manifolds & Fuel Related Parts, Engine Assembly-Oil Cooler & Oil Filter, Engine Assembly-Water Pump, Pipe & Related Parts, Engine To Transmission Mounting, Flywheel & Housing, Intake Manifold Shield/Covers, Shield/Engine Splash) | Frames, Springs, Shocks, Bumpers, Fascias (Bumper/Front, Bumper/Rear, Frame, Lock Cylinder/Spare Wheel, Spare Wheel Carrier, Springs/Rear, Suspension Controls/Electronic, Suspension/Rear, Trailer Hitch Platform, Vehicle Tie Down, Wiring Harness/Trailer) | Front Axle, Front Suspension, Steering (Steering Column-Column Shift, Steering Column-Floor Shift, Steering Control System/Rear, Steering Gear Assembly, Steering Gear Assembly/Rear Axle, Steering Linkage, Steering Pump Assembly, Steering Pump Lines, Steering Pump Mounting, Steering System & Related Parts, Steering Wheel & Horn Parts, Suspension/Front) | Front End Sheet Metal, Heater (Fender & Wheelhouse/Front End, Heater & Blower Assembly, Heater & Vent Control Cables & Harness, Heater Control Assembly, Hood, Hoses & Pipes/Heater, Jack & Tool Stowage, Labels, Labels/Emission, Paint/Touch-Up) | Fuel System, Exhaust, Emission System (Accelerator Control, Air Intake System, Control Module & Related Parts, Control Module & Related Parts-P.C.M. Interface, Cruise Control, E.C.M. Module & Wiring Harness, E.G.R. Valve & Related Parts, Exhaust Pipe Hanger Bracket, Exhaust System, Fuel Cooler, Fuel Filter & Mounting Bracket, Fuel Filter/Inline, Fuel Injection System-Cold Start Valve & Mounting, Fuel Injection System-Pipes & Module, Fuel Injection System-Rail & Injectors, Fuel Injector Rail, Fuel Pressure Regulator Coolant Lines, Fuel Pressure Regulator/High Pressure, Fuel Pressure Regulator/Low Pressure, Fuel Pump, Fuel Supply System, Fuel Supply System-Front, Fuel Supply System-Front Low Pressure, Fuel Supply System-Rear, Fuel Supply System-Rear High Pressure, Fuel Tank And Mounting, Fuel Tank Filler Pipes & Hoses, Fuel Tank Sender, Fuel Tank Shield, Heat Shields/Exhaust, Intake Manifold, Intake Manifold & Throttle Body, P.C.M. Module & Wiring Harness, Throttle Body, Turbocharger Assembly, Turbocharger Cooling System, Turbocharger Exhaust Inlet, Turbocharger Exhaust Outlet, Turbocharger Intercooler System, Turbocharger Lubrication System, Vacuum Pump & Related Parts, Vapor Canister & Related Parts, Ventilation Hose & Related Parts) | Maintenance Parts, Fluids, Capacities, Electrical Connectors (Normal Maintenance Replacement Parts) | Rear Body Structure, Moldings & Trim, Cargo Stowage (Endgate/PUBX, Moldings, Nameplates, Pickup Box/Fleetside, Pickup Box/Fleetside-Outer Panel) | Starter, Generator, Ignition, Electrical, Lamps (Auxiliary Battery Cables, Backup Alarm, Battery Cables, Battery Mounting, Block-Instrument Panel BEC, Block-Instrument Panel Mid BEC, Block-Underhood BEC, Coil Assembly/Ignition, Engine Electrical/Control Parts, Generator Mounting, Generator Mounting-LH, Generator Mounting-RH, Horn, Key & Lock Cylinders/Ignition, Lamp/High Mount Stop, Lamp/High Mount Stop & Cargo, Lamps/Front, Lamps/Rear, Lamps/Rear Clearance & Pubx Ident, Lamps/Roof, Module/Body Control, Spark Plug Wiring, Starter Motor, Starter Motor And Mounting, Wiring Harness Oxygen Sensor, Wiring Harness/Accessory Power Supply, Wiring Harness/Auxiliary, Wiring Harness/Body, Wiring Harness/Chassis, Wiring Harness/Engine, Wiring Harness/Engine Cable, Wiring Harness/Engine Compartment, Wiring Harness/Engine LH Side Front Lower, Wiring Harness/Engine LH Side Front Upper, Wiring Harness/Engine LH Side Rear, Wiring Harness/Engine LH Side Rear Upper, Wiring Harness/Engine Rear, Wiring Harness/Engine RH Side Front Lower, Wiring Harness/Engine RH Side Front Upper, Wiring Harness/Front Lamps, Wiring Harness/Front Side Door, Wiring Harness/Instrument Panel, Wiring Harness/Roof Marker Lamp) | Transmission - Automatic (Automatic Transmission Auxiliary Accumulator Valve, Automatic Transmission Case & Related Parts & Park Lock Linkage, Automatic Transmission Clutch Gears, Automatic Transmission Control Valve, Automatic Transmission Converter, Automatic Transmission Main Housing, Automatic Transmission Miscellaneous Options, Automatic Transmission Oil Cooler Pipes, Automatic Transmission Oil Pan, Automatic Transmission Oil Pump, Automatic Transmission Overrun Clutch, Automatic Transmission Planetary Gears, Automatic Transmission Rear Cover, Automatic Transmission Valve Body, Frame/Transmission Supports, Shift Control, T.C.M. Module, Transmission Filler Tube) | Transmission - Manual (Frame/Transmission Supports, Manual Transmission Case & Related Parts, Manual Transmission Counter Shaft & Reverse Idler Components, Manual Transmission Input Shaft & Main Shaft Components, Manual Transmission Main Gears, Manual Transmission Shift Control & Components, Shift Control, Transmission Vent Hose)