Your Cav has Fuel Injection, therefore the electric fuel pump is inside the tank. uel injection units require much more pressure than a manual pump can deliver.
SOURCE: 2004 CAVALIER FUEL PUMP
lift back seat and their is an access cover to fuel sender unit that houses the fuel pump as well.check connections as well as often the pump is ok but the wiring connection is burnt
SOURCE: 1997 Chevy Cavalier won't start
the problem is the crank shaft position sensor ! I just replaced it on my wifes and it runs like new....
SOURCE: how to disconnect 2004 cavalier fuel filter quick connect
You can use two small flathead screwdrivers. What you need to do first is the unclip the connection. Once you unclip it, you need to push in on the smaller side of the clip with a regular flat head screwdriver. When you push it in, you also have to try to push the hinged side clip in as well. The hinged side clip needs to be straightened out so the you can pull the filter pipe out. I found the easiest way to do this is to line the two opening up, and while I'm pushing on the smaller side of the clip, stick a small screwdriver on the backside and pry it out. It is a pain to do it without the special tool, it took me about 10-15 minutes to make pry the green "ring" off so that I could pull out the line.
SOURCE: replace fuel pump on a 2001 chevy cavalier
First, if your car still runs, pull the fuel pump relay, and start your car, letting it run until it dies. This will depressurize the fuel system. Then you must support the fuel tank, and take loose the straps that hold it up. Slowly lower the tank until you can unhook the tank filler hose and overflow hose by taking the clamps off and sliding the hoses off. lower it some more, and unhook the fuel lines; they require you to insert a special tool around the edge of the connection, however this can be improvised with screwdrivers or a piece of plastic or metal bent into a C shape. Next unhook the wire connection. Once you get it down, it's easiest to empty as much fuel as you can; as this will help you get it back into place. The fuel pump is inside the tank, which locks into place with a 1/8th turn. You will need a hammer and a brass punch for this job, as it needs to be tapped around to unlock. It will then lift out. Compare the two pump assemblies. The inside parts can be slightly different, but ensure that the fuel lines are IDENTICAL and the wire connection is IDENTICAL. The new one will come with a new silicone seal. Ensure that you don't put the new one in in such a way as the float doesn't bind, otherwise you'll be doing this procedure again if you don't like guessing how much gas you have. This can be a challenge to wrestle with putting the new one in, as you have to push it down to compress the new seal, and turn it to lock it. Once you get it started, you can let up and use the hammer and punch again to tighten it the rest of the way. Next, put it back together just as you took it apart, and don't forget to hook up the wires, hoses, and fuel lines. No tools required for the fuel lines, they just snap together. Once everything's tight and hooked up, put gas back in it, and if you haven't already, put the fuel pump relay back in. This you can do as soon as the car dies, and is completely optional if the car won't run at all. You are now ready to start it up, but turn the ignition on to the run position, wait a few seconds for the pump to pressurize, and then start it. Have fun, and feel free to ask any questions should you have any.
SOURCE: how do i change the fuel pump on a 2004 chevy
you will have to drop the fuel tank ,remove the straps while supporting tank,remove fuel lines and vent lines,lower to ground ,remove ring that holts pump ***. in tank.Be certain to change filter and strainer
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