Okay - sry, long night last night. We can go about this 1 of two ways, lift the bed or drop the tank partially.
Both are fairly easy, but will require you to be under the truck so get it in a good dry area if you can.
General Tools Needed
3/8 Ratchet
24" Extention
15mm Deep Socket
Ball Peen Hammer
12"+ & 6" Flat Head Screwdriver
1/2" Breaker Bar
Fuel Line Disconnect
Jack Stand
Scissor Jack (from your truck)
Soap, Water, Bucket & Brush
Good to Have, But not Needed
Air compressor
Air Hose
Impact Wrench
1/2" Drive Impact Sockets
24" 1/2" Extension
Blow Gun (canned air can be used for this as well)
Here are link for the fuel line disconnects...
Lisle 37000 - A/C & Fuel Line Disconnect Tool Set | O'Reilly Auto Parts
Here's a link to by bed lifting thread so you can see better, I will you pics from that thread to show different things as well with dropping the tank.
http://www.ramforum.com/f76/fuel_pump_replacement_easy_way-78933/
Dropping the Tank With Fuel Still In
We need to disconnect the filler neck from the fender, you'll need a T12 Torx driver and remove the 3 screws from inside the filler door.
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Next we can move to the charcoal canister, the 2 clips on the back are depressed to release. You push the bottom from the bottom and the top from the top.
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I found it easier to pop the top loose, wedge one of the flat head screwdrivers behind it so when you use the other screwdriver to push the release tab on the bottom the top won't pop back in and lock. Once they're released and the canister can swing free you then wanna move to the front pivot tab (disconnect the harness from the canister) you wanna then get the canister off the tab and this will take some finagling, but she'll come off. You can stick the screwdriver behind the tab and pry it out towards the driveshaft to get it off.
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Now we can start with dropping the tank, get your ratchet or impact with the 15mm socket and take the nuts 90% down the studs.
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