Where is the TPS located on a 1991 Chevy pickup?

On a 1991 Chevy pickup, the Throttle Position Sensor (TPS) is typically located on the throttle body. The throttle body itself is situated on the intake manifold, usually near the engine's front. It's a relatively small sensor, often screwed directly into the throttle body. You'll need to consult a repair manual specific to your 1991 Chevy truck's engine (e.g., a 350 small-block, a 454 big-block, etc.) for the exact location and visual identification. A diagram in the manual will be most helpful.