* On the frame rail: This is a frequent location. Look along the frame, near the fuel tank, for a cylindrical canister.
* Near the fuel pump: Sometimes it's integrated into the fuel pump assembly itself, particularly if it's an in-tank fuel pump.
* Close to the engine: Less common, but possible.
To find it, you need to:
1. Consult your owner's manual: This is the best resource. It will show a diagram of the fuel system.
2. Look at a repair manual specific to your truck's engine: Haynes and Chilton manuals are good options. They often have detailed diagrams.
3. Search online: Use search terms like "1989 Chevy Cheyenne [your engine type] fuel filter location" Replacing the engine type (e.g., 350 small block, 454 big block) will give more targeted results.
4. Visually inspect the fuel lines: Start at the fuel tank and trace the lines toward the engine. The filter will be a noticeable component in the line.
Safety Warning: Before working near the fuel system, disconnect the negative battery terminal to prevent accidental sparks. Fuel is flammable. Work in a well-ventilated area.