I got water in gas tank but dont have money to drop tank what other options car cranks but cuts off when put in drive doesn't seem like its getting gas what should i do will gas treatment work?

have to remove the gas/water in that is in the tank by removing the tank so you can turn it upside down and make sure every drop of the gas/water is out of the tank siphoning it out may leave some old gas/water in the bottom of tank then get rid of it let the tank dry out for a day and reattach it, then refill your tank with gas it may screw up for a little bit until the gas/water trapped in the fuel line is totally gone.
Go to you tube and look up "removing gas tank"

the fuel pump is in the tank u will need to drop the tank out from under the vehicle and then you can gain access to the pump, you will need to remove the lock ring from the pump module and then you can remove the pump from the tank and replace it with a new one

I would run a compression check and bleed test to see if you have a weak cylinder due to a cracked head or bad valve...if you sucked some water in the intake or through the exhaust it could of done some internal engine damage.

your going to get huge guesses as to the problem without having it checked by a good technician. could be a crank sensor could be a bad fuel pump could be a faulty connection. could be the computer i could go on just to cover the things that could cause this. dont chase your tail on this by running threw all the things posted to find your problem. get a quality tech to figure this out. tell them its has to be right when they tell you or you dont pay. its how its done in my shop. hope this helps and good luck

good idea blow it backwards and see what happens if it runs for a while then at least you know what to do ,drop the tank and take the sender /pump unit out ,clean the gauze filter on the bottom of the pump and also clean out the fuel tank as i suspect that its full of rust which is causing the filter to clog up .Join teh clan for not having any money either its no better here in spain thats for sure and we have to pay a fortune for petrol which is why we all drive diesels if we can afford one

could be the coil. cracked up or weak. sounds like weak spark or even not sparking on 1 or 2 of the sparkplugs

seems that you might have some water in the gas tank. get some gas dryer and pour in the tank. 2 half pint bottles should do to a half tank of gas. good luck.

Too bad GM doesnt provide a cover to access tank without dropping the tank. I would think creating this "hole" would be quite the endeavor and done correctly would add quite the additional time and expense. Decline cutting holes and drop the tank in order to service the pump/sender. Any reputable repair firm should or would never recomend this measure in order to access the pump in the fuel tank I would hope....

Cutting a hole in the trunk is not a bad idea, but you will have a problem. The hoses and wires are very close to the body and chances of cutting into them are good. You are limited in what you can use to cut the hole with. any power tools will make sparks (what you don't want anywhere near a fuel supply) You cannot use a torch either. A hole saw is the right way to cut the hole but it will be expensive for a good one that size and you cannot use it with the tank installed. You can use a good pair of sheet metal shears but the hole will be sloppy and unprofessional (and extreme care still must be used so stuff does not get cut.)
Your best option is to bite the bullet and do the job correctly. Once the tank has been removed and is far away from the car, clean up all fuel residue (if you can smell fuel it's still there), then you can cut a nice hole for future repairs. You don't need instructions to cut a hole...make it large enough to get the pump through and so you can access lines to remove connectors. Make a nice cover for it and use very very short self tapping screws and silicone sealer to prevent leaks.
If you do opt for cutting without removal, at least put a piece of sheet metal between pump connections and floor to avoid damaging wires & lines. (you may need to loosen tank straps to do this.)
Good luck

If the fuel gauge drops off when you are driving then its a sending unit problem that means you have to drop the tank and replace the float and sending unit. This is a common problem for alot of cars because of cheap gas. If you have to drop the tank check the fuel pump canster for dirt because of cheap gas. Replace the fuel pump strainer and fuel pump filter. If the car or truck has about 100,000 miles you might want to change the fuel pump at that time also just to cover your back. If you take it to a shop they will charge you at least $900 to start. But if you do it yourself it will cost you about $200 dollars maybe alittle more.