Remove box from a 95 K3500,,,,

[94GMC2500]

Hello, What are the chances of removing the box on a 95 K3500 Wisconsin truck? I mean will the bolts come out without breaking stuff? I have to put a sending unit in the tank, fuel gauge is not working. I have dropped the tank out the bottom on other trucks but that's not much fun.

[trbankii]

Considering the shape of my ’93, I’d be expecting at least requiring some new hardware...

[94GMC2500]

Is it possible to spray penetrating oil on the bolts or are they hidden?

[trbankii]

If they’re hidden, it is going to be harder to get a wrench on them than to spray penetrating oil. ;)

[94GMC2500]

I meant if the threaded end is hidden,,,,,

[trbankii]

I’d have to crawl under my truck to look, but I’m pretty sure the bolt goes in from the top down with the nut on the bottom.

[a5150nut]

They are carriage bolts, rounded on top. You can spray from underneath. And I would give the a couple shots over several days to have plenty of time for the skunk pee to work.

[DieselDavy]

I'm with "Nut", spray some stuff on them for a few day and maybe tackle it next weekend.
(just don't let it run out of fuel!)
Dave

[94GMC2500]

I thought the bolts went from the bottom up? I have to look I guess.

[DmaxMaverick]

Older trucks = carriage bolts, top-down. Newer trucks, bottom-up. Not sure about 94 or when they actually changed. If you see the bolt heads in the bed, the nuts are underneath. If you don't see the bolt heads, they bolt from the bottom-up, into the cross-bars. You may be able to reach a couple of them with penetrating oil, but some are hidden or very difficult to reach. The bottom-up bolts are less prone to seizing, like the older design. It may be a non-issue.

[94GMC2500]

My 95 goes from the bottom up,,,

[94GMC2500]

Waiting for my back problems to ease up before tackling this project.

[jggiedeman]

94 is top down. Spray the nuts from under a few days in a row. More small items that you will find out once removing. Fuel pipe has connections that can be tedious. Ground lines for the lights, trailer package. Removing rear light assemblies helps. I removed my bumper and hitch assembly. Far easier to remove the bed. I have a CC Duelie so 4 other guys helped. 4 because there is always something still attached to the bed (Did I forget the diff axle vent or not?). Good chance to replace fuel lines (rubber), fuel pump, etc. Have the means to upgrade the exhaust system - best time now if a DIY project.

Luck