3-second answer: The fuel filter is on the frame rail, driver's side, under the cab (just forward of the rear axle on most). Depressurize by pulling the fuel pump relay/fuse and cranking the engine 5 seconds, then swap: two quick-connect fittings (or banjo bolts on some years), arrow points toward the engine. A clogged filter = long crank, no-start when warm, or a fuel pump that 'dies' and works again after it cools.
Symptoms of a clogged filter
- Long crank before start
- Stalls under load / at highway speed, restarts after sitting
- Fuel pump 'failed' but tests fine
- Hesitation at speed
The swap
- Remove the fuel pump relay/fuse (or run the engine till it dies), crank 5s to bleed pressure. Never skip this — the system holds 30-45 psi.
- Jack/driver's side, reach the filter on the frame rail.
- Release the quick-connect clips (or the banjo bolts), note the direction arrow.
- Install the new filter (arrow toward the engine), reconnect, and prime (key on-off-on-off-on a few times) before cranking.
- Check for leaks; test pressure if you still suspect the pump (30-45 psi rail).
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