The power steering pump on a 1995 Chevy Suburban is located on the front of the engine, typically driven by a belt connected to the crankshaft pulley. It's usually fairly low down and to the side of the engine, somewhere near the alternator and other front-mounted accessories. You'll likely find it nestled amongst the belts and hoses. Precise location may vary slightly depending on the engine (e.g., 5.7L, 7.4L).
To be certain, consult a repair manual specific to your 1995 Chevy Suburban's engine. A diagram will show the exact location clearly.
