Is there more than one fuel filter on a 1999 Tahoe with 5.7 you are getting longer crank times and was told that may be another besides the in line frame rail?

Yes, there are two fuel filters on a 1999 Tahoe with a 5.7L engine. The first is located in the fuel tank and is accessible by removing the fuel pump assembly. The second is located in the engine compartment and is usually accessible without removing any other components.

Here is the location of both filters:

In-tank fuel filter:

- Open the fuel filler door.

- Remove the fuel filler cap.

- Remove the fuel tank sending unit lock ring using a spanner wrench.

- Remove the fuel tank sending unit.

- The in-tank fuel filter is located at the bottom of the fuel tank sending unit.

Engine compartment fuel filter:

- Locate the fuel filter in the engine compartment. It is usually located near the fuel injector rail.

- Disconnect the fuel line from the fuel filter inlet and outlet ports.

- Remove the fuel filter mounting bracket bolts.

- Remove the fuel filter.