Engine & Drivetrain:
* Various V6 and V8 engines: Different sizes and power outputs were available.
* Transmissions: Manual and automatic transmissions were offered, with varying numbers of gears.
* Drivetrain: Two-wheel drive (2WD) and four-wheel drive (4WD) were both options.
Exterior:
* Different trim levels: This affected the exterior appearance, with varying levels of chrome and other styling elements.
* Paint colors: A wide range of colors were available.
* Wheels/Tires: Different wheel styles and tire sizes were offered.
* Bed options: Short bed, long bed, and potentially a few other specialized bed lengths.
* Chrome packages: Added various chrome accents.
* Toolboxes: Bed-mounted toolboxes were an available option.
Interior:
* Cloth or vinyl upholstery: Different fabric choices were available.
* Power windows: Electrically operated windows.
* Power locks: Electrically operated door locks.
* Air conditioning: A climate control system.
* Tilt steering wheel: Adjustable steering wheel angle.
* Cruise control: Automatic speed control.
* AM/FM radio: Standard or premium sound systems with cassette players were common.
* Power seats: Electrically adjustable seats.
Other options:
* Towing packages: Equipment to increase towing capacity.
* Suspension packages: Options for heavier-duty suspension for hauling or off-road use.
* Heavy-duty axles: For increased load-carrying capacity.
To know the *exact* options available on a *specific* 1990 Chevy truck, you'd need to look at its original window sticker (if it's still available), the dealer's invoice, or the vehicle's build sheet (if it can be found). The VIN number might also offer some clues when cross-referenced with GM documentation.
