Is there a door in the vehicle that would let you change the fuel pump without dropping the gas tank

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https://www.google.com/search?q=cadillac+1988+replace+fuel+pump

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Depends on the vehicle. On most you have to drop the fuel tank. A very few have an access panel either in the trunk or under the back seat.

Much easier if the tank is empty. Siphon or pump the fuel out of the tank. Disconnect the negative battery cable. Raise the vehicle and install jack stands to ensure the vehicle is not going to drop on you. There are mechanical straps that hold the tank in place. There are also electrical connections for the fuel pump and fuel lines to be disconnected. Place a jack under the tank to support it and then remove the straps holding the tank in place. Lower the tank enough to gain access to the fuel lines and electrical connection. Disconnect the electrical and fuel lines and lower the tank until it clears the vehicle.
Be VERY careful with the fuel that was drained and whatever fuel remains in the tank. It is very dangerous.

You should be able to access it from the back of the fuel tank without dropping the tank, although you will have to raise the vehicle a bit to have good access.
http://www.1aauto.com/toyota-rav4-fuel-pump/mo-c/399-65

Most likely not. Almost all vehicles now a days have the fuel pump built into the gas tank. If its not built into the gas tank then your going to have to drop the tank to access the girl pump

Basicaly your fuel pump located inside of gas tank, you have to lift and secure the vehicle high enough to lose and drop the gas tank!!
Before decided to do this make sure gas tank is near empty lift&secure the vehicle visual check around the gas tank make sure all fuel and evap lines are disconnected nothing hold the gas tank except holder brackets, use under jack and safely secure gas tank( do not use direct jack to gas tank use wooden piece to dont damage it)
use right size socket and wrench lose braket holdet nuts and bolts safely drop the tank and place on safe work place (no smokes or sparks)
locate to fuel pump and remove the locker pin and pull out fuel pump slowy your fuel pump should sale complete assembly so replace pump unit and be carefully complete wire connections (TIPS,,With new fuel pump make sure replace the sealing gasket with correct new one or you gonna have serivce engine light for small evap leak so make it right at first time!!))
reinstall eveything the way you removed it !!
good luck and make sure you gonna have helper around to drop the tank<

Smoking something?

Remove the gas tank,
pump comes out the top

Same on almost all vehicles, for
the last 30 years

All vehicles with fuel injection use a high-pressure pump mounted inside the gas tank. This is virtually all vehicles built since about 1990. I don't know about this particular vehicle, some have an access panel above the tank that allows you to remove the pump without dropping the tank, others don't. Dropping a nearly full tank of gas is no easy task. Try asking your auto parts store or the Chrysler parts counter if this car has such an access panel.

By the way, the pump is immersed in the fuel, and uses the fuel to cool the pump. Never let your tank get below 1/4 full to reduce overheating of the pump, which shortens its life. Occasionally is OK, but running below 1/4 tank on a regular basis will cut the life of the pump significantly.

Most likely if this is a fuel injected vehicle which most modern vehicles are. The fuel pump is located in the gas tank. To get to it, you most likely have to drop your exhaust then drop your rear axle in most cases to then be able to drop the gas tank and access the fuel pump.

the fuel pump is in the tank on the car...you have to drop the gas tank to get to the fuel pump in order to change it out.