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One fuel filter is in the fuel pump of the Express Chevy 3500, which is used to push fuel or gasoline through the fuel line. The fuel pump is inside the gas tank. This fuel filter is a mesh or screen that prevents large foreign particles for entering the fuel pump. Access to the fuel filter is obtained by removing the fuel tank and then the fuel pump from the fuel tank.
Second Fuel Filter Location
The second fuel filter is within the fuel line itself. After the fuel pumps extracts fuel from the gasoline tank and into the fuel line, fuel flows through the line and through another filter on the driver's side of the Express Chevy 3500 under the front wheel suspension. This fuel filter cleans the small particles that escaped from the fuel tank.
Fuel Filter Types
The year of your Chevy Express 3500 determines what type of fuel filter is installed on the van. The fuel tank filter is always mesh or screen, but the fuel line filter can be of three different types. Two types are snap-on filters, while one type has clip-on ends.
In the 1995 version it was located in the fuel tank. There's a removable plate on the top of the tank that the fuel line comes from - remove that and the pump comes with it. 1990 could be different, trace the fuel line back from the carby. If you don't see a pump anywhere then it's in the tank.
you'll have to drop your fuel tank most likely. best to buy a chilton or a haynes manual for that unless your pretty mechanically inclined. usually there are fuel lines, at least one wire plug, and at least 2 straps that have to be undone before lowering it completely.
The pump is mounted inside the tank, you will either have to remove the tank or check to see if there is an access plate on the rear floor of the van above the fuel tank.
On those models the pump and sender unit are all in one. Check on Rockauto dot com for a price, their prices are generally very good.
what you need to do is buy a syphon hose that you push into fuel tank drain tank out they sell the crank stle based like a fishing rod as for your problem i would check the line from your gas tank to your emmission canister that it is not restricted if okay check fuel pump it could be heating internaly when fuel is lower than the pump housing when fuel is above pump keeps it alot cooler
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