Hello all. This is my first post here. I just picked up a 91 D250 single cab, long bed. Can someone tell me what size fuel tank I have in this thing? Also, is it normal for the fuel gauge needle to constantly fluctuate a quarter tank up or down? Thank you in advance.

 

I believe that I've read on here that all 1st Gens had a stock 30 gallon tank unless it's been modified. My needle fluctuates quite a bit too. Welcome to the forum! Fill out your sig(under user CP) so we can see what you've got... there's a sticky on it(top post in this forum) if you need help.

 

There's a TSB on the fuel gauge / sender ground. That might be your problem.

 

Can you please elaborate on the TSB on the fuel gauge, and what I can do to fix it?

Mahalo.