To know for sure whether *your* 1995 Chevy pickup has a carburetor or fuel injection, you need to:
* Check the engine bay: Look for fuel injectors (small nozzles near the intake manifold) if it has fuel injection. A carburetor will be a larger, more complex device on top of the engine.
* Check your vehicle's documentation: The owner's manual should specify the engine type and fuel system.
* Look at the VIN: The Vehicle Identification Number can be decoded to reveal engine specifications. You can use online VIN decoders for this.
Without looking at the specific truck, it's impossible to say definitively.