in my 89 V3500 is there one filter or two? Towing to BF last week it died on the left tank after about 40 miles. I pulled over and it started back up fine. Ran great for about 20 more miles, and died again. This time it wouldn't start back up though. The exhaust runs near the left tank so I though maybe I had a vapor lock issue. Switched tanks and it drove fine the rest of the way. After it cooled i removed the cap and tried it again...no joy I have about 12 gallons of gold in there I would like to use Filter or pump..or???