1. Start at the crankshaft pulley.
2. Move up to the water pump pulley.
3. Go over to the power steering pump pulley.
4. Down to the air conditioning compressor pulley.
5. Across to the alternator pulley.
6. Finally back to the crankshaft pulley.
The belt should wrap around each pulley in a clockwise direction. Here is an image detailing the routing:
[Image of the serpentine belt routing diagram for a 1991 Chevy 350]
