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Username Post: Suburban Gas Tank        (Topic#369134)
Senior Member
Posts: 1841

Loc: Whitewater, CO
Reg: 05-25-01
08-04-22 03:13 PM - Post#2845452    

I have a '93 Sub. I changed the fuel pump because I switched to a Vortec motor and the new one has more pressure.

When I had it off, I noticed a bunch of rust in the bottom of the tank. Also, when I fill it all the way up, it leaks outa the vents (I think, all I know, is that gas comes off the top of the tank).

Can I get by with less evap hoses?

Does anybody make a plastic tank?

The other day, it ran outa gas at 3/8 of a tank. I assume that the sock filter in the tank is clogged w/rust. Once I put gas in it, it ran fine. And, judging by the fact that I can only get about 20 gal in it at the time, 3/8 of a tank is right (the gage is correct).

Can I go to a smaller tank? This one is 40 gal, or more.

Subject Matter Expert - Senior Member
Posts: 3995
Loc: Twin Cities, Minnesota, U...
Reg: 04-25-04
08-04-22 07:27 PM - Post#2845473    
    In response to Stinky

It was common for the baffle to come loose the the suburban 40 gallon gas tanks, but I can't remember which vehicle years it happened to. The baffle would move and hold the fuel sender arm up and the owner would run out of gas. The baffle was held in place by push clips on a couple studs welded to the bottom of the tank and the clips would work their way off the studs. The fix was to screw stamped steel pal-nuts on the studs instead of using the push clips.

There may be a service bulletin on this.

For those of you that are wondering why you are not getting replies to your thread:

Did you give the model, year, engine, fuel system type, and transmission information?

If your vehicle has been altered from stock, let us know about that too.

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