Where is the fuel sending unit on Chevy G20?

The fuel sending unit on a Chevy G20 van (depending on the year and engine) is located inside the fuel tank. There's no external access. To reach it, you'll need to:

1. Drain the fuel tank: This is crucial for safety.

2. Drop the fuel tank: This involves disconnecting fuel lines, electrical connections, and possibly the tank straps. This is a significant undertaking requiring mechanical skills and safety precautions.

Therefore, I strongly advise against attempting this repair unless you have significant experience working on vehicles. It's a job best left to a qualified mechanic. Improper handling of fuel can lead to serious injury or fire.