Wanted to get some thoughts on the best way to drain a fuel tank which has had fuel sitting in it for 5 years or so ....

Thinking either to remove access panel in rear of truck and somehow get a siphon into the fuel or else use an external pump to pull out as it seems to say can be done in the manual.

Other option I had though about and not found examples of anyone doing is to use a spare battery to hotwire the in-tank fuel pump and collect the fuel at the engine bay (currently has no engine).

Last option and least desirable unless the above prove too difficult is to put a hole in the bottom of the tank and put a threaded drain plug in after it is empty. Could come handy off-road if someone else runs out of fuel I guess but seems prone to leaking.

 

How about a length of fuel line down the filler neck hooked to a $20 inline electric fuel pump from eBay.

 

I hear the anti-siphon valve of the truck stops this from working.

 

Disconnect line at filter, add length of hose to reach container and jump fuel pump relay.
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That seems the most logical to me. Avoids gunking up fuel filter as well providing I disconnect from the inlet side.

What is the best way to jump relay - get the plug inside the inspection port in the truck of the vehicle? Is this the only way?

 

No reason to filter the old gas on way out and should pump faster.

You can jumper the relay if you are familiar doing so and no need for accessing pump connector unless already open or planning to enter.
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I've done this. I wasn't able to siphon out of the filler neck. I pulled those hose, connected an extension hose to a container, and ran the pump.

For an extension, I used something like a length of heater hose that slipped over the fuel line and fitting.

 

Thanks all. Makes sense.

From reading the service manual, it appears as if I can jump the fuel pump where the "main relay and fuel pump relay" are in the engine compartment (#5 in diagram below).