OEM parts categories for 2018 Cadillac Ct6: Body Moldings, Sheet Metal, Rear Compartment Hardware, Roof Hardware (Insulators/Body, Moldings/Body Ground Effects, Moldings/Body-Lower, Moldings/Body-Upper, Plugs/Body, Rear Compartment Hardware, Rear Compartment Lid Hardware/Decklid Control Module, Sheet Metal/Body Rear, Sheet Metal/Body Side, Sheet Metal/Front Compartment-Radiator Support & Bracing, Sheet Metal/Front Compartment-Side Rail, Sheet Metal/Roof, Sheet Metal/Side Door-Front & Rear, Sheet Metal/Underbody, Sheet Metal/Underbody Reinforcements, Sunroof, Sunroof Drainage, Valve/Body Pressure Relief, Wheelhouse Liner/Rear) | Body Mounting, Air Conditioning, Audio/Entertainment (A/C & Heater Module Assembly, A/C Compressor Assembly, A/C Compressor Mounting, A/C Control System Sensor, A/C Refrigeration System, A/C Refrigeration System/Front, A/C Refrigeration System/Rear, Air Distribution System-Rear, Air Distribution System/Auxiliary Rear Ducts, Air Distribution System/Front, Air Vents/Cowl Side, Antenna Cover, Antenna/Audio, Antenna/Digital Audio, Audio System, Auxiliary A/C Evaporator & Blower & Heater Assembly, Camera System, Communication System, Entertainment System, Infotainment System, Radio Mounting) | Body Wiring, Roof Trim (Wiring Harness/Body) | Brakes (Brake Booster, Brake Booster & Master Cylinder Mounting, Brake Caliper/Front, Brake Caliper/Rear, Brake Electrical System, Brake Lines/Front, Brake Lines/Rear, Brake Master Cylinder, Brake Master Cylinder & Mounting, Brake Pedal, Brake Pressure Modulator Valve, Parking Brake System) | Brakes, Rear Axle, Propeller Shaft, Wheels, Tires (Axle Shaft/Rear, Prop Shaft Mounting-Front, Prop Shaft Mounting/Rear, Prop Shaft/Rear, Rear Differential Carrier, Rear Differential Carrier Mounting, Tire, Tire Inflator, Tire Pressure Sensor, Wheel Caps, Wheel Nuts, Wheels, Wheels & Wheel Covers) | Cooling System, Grille, Oil System (Air Deflector/Underbody-Front, Air Deflector/Underbody-Rear, Engine Block Heater, Engine Coolant Fan, Engine Oil Cooler And Lines, Grille/Radiator, Hoses & Pipes/Radiator, Pulleys & Belts/Accessory Drive, Radiator Assembly, Radiator Mounting & Related Parts, Radiator Mounting & Related Parts-Auxiliary Radiator Detail) | Engine (Engine & Transmission Mounting, Engine Assembly & Partial Engine, Engine Assembly-Camshaft Cover & Coil, Engine Assembly-Cylinder Block & Internal Parts, Engine Assembly-Cylinder Head & Related Parts, Engine Assembly-Front Cover, Timing Chain & Tensioner & Cooling, Engine Assembly-Manifolds & Related Parts, Engine Assembly-Oil Pump & Balance Shaft Detail, Oil Pan & Related Parts, Engine To Transmission Mounting, Intake Manifold Shield/Covers) | Frames, Springs, Shocks, Bumpers, Fascias (Absorber/Rear Shock, Bumper/Front Fascia, Bumper/Front Structure, Bumper/Rear, Frame & Mounting, License Plate Mounting/Front, License Plate Mounting/Rear, Suspension Controls/Electronic, Suspension Controls/Electronic-Vehicle Dynamic Sensors, Suspension/Rear-Control Arms, Spring & Stabilizer Bar, Suspension/Rear-Knuckle Details, Suspension/Rear-Support And Mounting) | Front End Sheet Metal, Heater (Fender & Wheelhouse/Front End, Fluid And Lubricant Recommendations, Guard/Front Mud, Guard/Rear Mud, Heater Assembly/Coolant Heater & Mounting, Hood, Hoses & Pipes/Auxiliary Heater, Hoses & Pipes/Heater, Hoses & Pipes/Heater-Front, Labels, Paint/Touch-Up, Sight Shield/Engine Compartment, Spare Wheel Stowage & Jack Parts, Vehicle Maintenance) | Front Suspension, Steering (Drive Shaft/Front Wheel LH Side, Drive Shaft/Front Wheel RH Side, Front Differential Carrier, Front Differential Carrier Mounting, Steering Column/Switches & Covers, Steering Gear Assembly, Steering System & Related Parts/Front, Steering System & Related Parts/Rear, Steering Wheel & Horn Parts, Strut Assembly/Front, Suspension/Front-Knuckle Detail, Suspension/Front-Mounting) | Fuel System, Exhaust, Emission System (Accelerator Control, Air Intake System, E.C.M. Module & Related Parts, Exhaust System/Front, Exhaust System/Rear, Fuel Control Module, Fuel Injector Rail, Fuel Supply System, Fuel Tank & Vapor Canister, Fuel Tank And Mounting, Fuel Tank Filler Pipes & Hoses, Heat Shields/Exhaust, Intake Manifold, Turbocharger Assembly, Turbocharger Cooling System, Turbocharger Cooling System-Left Hand Unit, Turbocharger Cooling System-Right Hand Unit, Turbocharger Intercooler System, Turbocharger Lubrication System, Turbocharger Mounting-Left Hand Unit, Turbocharger Mounting-Right Hand Unit, Turbocharger Wastegate System, Vacuum Pump & Related Parts) | Interior Trim, Front Seat Trim, Seat Belts (Front Seat Mounting, Inflatable Restraint System/Driver & Passenger, Inflatable Restraint System/Roof Side, Roof Headliner, Seat ASM/Left Hand Front, Seat ASM/Right Hand Front, Seat Assembly/Left Hand Front-Back, Seat Assembly/Left Hand Front-Back Pad Details, Seat Assembly/Left Hand Front-Cushion, Seat Assembly/Left Hand Front-Cushion Pad Details, Seat Assembly/Right Hand Front-Back, Seat Assembly/Right Hand Front-Back Pad Details, Seat Assembly/Right Hand Front-Cushion, Seat Assembly/Right Hand Front-Cushion Pad Details, Seat Belt Extension, Seat Belts-Rear, Seat Belts/Front, Trim/Center Pillar & Quarter, Trim/Door Sill Plates, Trim/Front, Trim/Front Door-Driver, Trim/Front Door-Passenger, Trim/Rear Door) | Rear Glass, Seat Parts, Adjuster (Quarter Window & Rear Window) | Rear Seat Trim, Carpet (Cargo Net, Carpet/Floor, Compartment Trim/Rear, Compartment Trim/Rear Sill Plate, Seat Assembly/Rear And Mounting, Seat Assembly/Rear-Back Detail, Seat Assembly/Rear-Center Back & Armrest Detail, Seat Assembly/Rear-Center Cushion Detail, Seat Assembly/Rear-Cushion Detail, Trim/Back Window Shelf) | Starter, Generator, Ignition, Electrical, Lamps (Accessory Power Control Module, Alarm System/Anti Theft, Battery Cables, Battery Cables/Rear, Battery Mounting, Drive Motor Battery Cables-Battery To Control Module, Drive Motor Battery Cables-Engine Compartment Cables, Drive Motor Battery Charge Port, Drive Motor Battery Charger ASM & Mounting, Drive Motor Battery Charger Cable, Drive Motor Battery Cooling/Rear, Drive Motor Battery Mounting, Drive Motor Battery-External Covers, Drive Motor Battery-High Voltage Cables, Drive Motor Battery-Internal Batteries, Drive Motor Battery-Internal Cooling, Drive Motor Battery-Internal Modules & Auxiliary Harnesses, Drive Motor Battery-Relay Junction Block Detail, Drive Motor Control Module Cable, Drive Motor Control Module Cooling/Front, Drive Motor Control Module Cooling/Rear Charger, Drive Motor Control Module-Power Inverter, Generator Mounting, Headlamp Control, Horn, Lamps/Front, Lamps/Rear, Module/Body Control, Module/Decklid Control, Module/Multifunction Power Converter, Module/Serial Data Gateway, Pedestrian Protection System, Relays/Body, Relays/Engine Compartment, Sensor System/Forward Collision-Camera, Sensor System/Forward Collision-Control Module, Sensor System/Forward Collision-Indicator, Sensor System/Forward Collision-Short Range Sensors, Sensor System/Front & Rear Object, Sensor System/Side Collision, Starter Motor And Mounting, Vehicle Direction System/Digital Map Module, Vehicle Direction System/Driver Monitoring System, Vehicle Direction System/Multi Function Energy Storage Module, Vehicle Direction System/Radars & Sensors, Vehicle Direction System/Vehicle Dynamic Sensors, Wiring Harness Connectors, Wiring Harness Terminated Leads, Wiring Harness/Chassis, Wiring Harness/Engine, Wiring Harness/Front Lamps, Wiring Harness/Instrument Panel) | Transfer Case (Shift Control, Transfer Case, Transfer Case Mounting) | Transmission - Automatic (Automatic Transmission Assembly, Automatic Transmission Case & Related Parts, Automatic Transmission Case Extension Assembly, Automatic Transmission Clutch Assembly & Related Parts, Automatic Transmission Control Solenoid Valve Body Assembly, Automatic Transmission Control Valve Assembly With Body & Valve, Automatic Transmission Drive Motor, Automatic Transmission Extension Assembly, Automatic Transmission Internal Gear & Carrier Assembly, Automatic Transmission Lower Control Valve Assembly, Automatic Transmission Oil Cooler Pipes, Automatic Transmission Park Lock Linkage, Automatic Transmission Park System Components, Automatic Transmission Reverse Clutch, Automatic Transmission Torque Dampener Housing, Automatic Transmission Upper Control Valve Body Assembly, Shift Control, T.C.M. Module, Transmission Vent Hose) | Windshield, Wiper, Mirrors, Instrument Panel, Console, Doors (Door Hardware/Front, Door Hardware/Rear, Entry System/Keyless Remote, Floor Console Lower-Front, Floor Console Lower-Rear, Floor Console Mounting, Floor Console Upper, Floor Console-Ashtray Package, Floor Console/Ashtray, Hoses/Windshield Washer, Instrument Panel Cleaning Cloth, Instrument Panel Lower LH, Instrument Panel Lower RH, Instrument Panel-Upper, Instrument Panel/Center Stack, Instrument Panel/Structure, Mirror/Outside Rear View, Roof Console, Windshield Trim & Hardware, Wiper System/Windshield-Front Lower, Wiper System/Windshield-Front Upper)