Is a 1994 Chevy k1500 5.7 fuel injected how do you tell?

A 1994 Chevy K1500 did *not* come with throttle-body fuel injection as standard. It would have had multi-port fuel injection (MPFI). There's no easy visual way to definitively tell from the outside, but here's how to confirm:

* Check the Engine Bay: Look for fuel injectors on the intake manifold. MPFI systems have individual injectors spraying fuel into each cylinder's intake port. If you see a cluster of injectors, you have MPFI. Throttle-body injection would have one injector spraying into the throttle body.

* VIN Decoder: Use a VIN decoder (many online) to check your truck's specifications. This will tell you the exact engine type and fuel system used.

* Owner's Manual: If you have the original owner's manual, it will specify the fuel system.

* Look for the fuel pressure regulator: MPFI systems usually have a fuel pressure regulator on the fuel rail.

In short, while a 1994 K1500 5.7L *couldn't* be throttle-body fuel injected, the only surefire way to confirm is by checking the engine itself for the fuel injectors on the intake manifold or by using a VIN decoder.