Okay, I don't know either. I'm trying to figure out what I'm going to use.
Okay, I don't know either. I'm trying to figure out what I'm going to use.
Yes they do. 87 was the first year for the TBI, and the last year of the square body regular cab truck. There are not actually "baffles", but more like a bowl around the pump.Originally Posted by lowchevytrucks8503
Does you engine have a returnless system on it? If not, pick up 04 or newer fuel rails, then you can run a ~99 Vette filter/regulator back by the tank and only have to run one line up to the engine.
Last edited by glock35ipsc; 08-13-2009 at 06:06 PM.
I have no idea if it has a returnless system on it or not.
87 should have baffles as it was an FI engine. The 86 was carbed and probably is not baffled as the float bowls in the carb take the place.
Look on the left side of the intake, if there are two fuel lines pointing to the rear, it is not a returnless system. The returnless will have only one line.
85 GMC Sierra Classic SWB
5.3L / 4L60E / 3.42
Thank you sir I will take a look tomorrow. I'm at home and the truck is at my dads place outta town. Are you running A/C?
Sorry Nathan I just read yours, I was thinking the way ya'll were. '87 was the first year for fi so i figured i thought it had a baffled tank.
Some one needs to look in one to see, Because I gurantee that there are no built in baffling inside the tanks. Basically there are no spot welds or seams on either half of the tank, besides the main one on the sides to connect the top and bottom half. It is physically impossible for one to be stamped into it. They are the same design as the 88-98 tank and same for 99-09 with the exception of these being plastic, yet still no baffles. Every time I build something and we build a cell for it the stock tanks get cut in half and scraped. I have yet to see a built in baffle in any tank. The only thing close to one is in the new GTO's but its just bracing.
so there empty? I just thought I needed to switch to keep fuel from sloshing around.......If it doesnt matter I'll keep the tank that I have.
Ummm.....almost every stock tank from the 80's 'til now has baffles. They're plastic inside the metal tanks. They're plastic inside the plastic tanks. There are studs spot welded to the inside of the tank and the plastic baffles slide down over them. They're held down by speed nuts. The late 80's t0 early 90's Suburbans had a recall to replace the baffle speed nuts.
Jon, you're not supposed to stick your face in the sender hole and take a big breath before using a match to see inside the tank.
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