Author Topic: 1987 Dual tank issues  (Read 762 times)

Offline Madctafter52

  • Newbie
  • Posts: 7
  • Newbie
1987 Dual tank issues
« on: April 15, 2022, 04:28:19 PM »
I have a 1987 GMC Wrangler (basically just a V2500) that originally came with a fuel injected 350. Somewhere along the line it got swapped with a carbureted 307. Whoever did the swap didn't really hook anything up except what was necessary and then called it a day, so i am dealing with a lot of random connecters and cut wires. My current task is setting up my fuel gauge and dual tank switch. The issue is that since this used to be fuel injected, have an ECM and the such there is a lot of wiring I don't need anymore. I think i just need power and ground to my cab switch and i will be good to go but just wanted to confirm. I edited this wiring diagram to what i think i need, is this correct?

Offline VileZambonie

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 19021
Re: 1987 Dual tank issues
« Reply #1 on: April 15, 2022, 05:45:38 PM »
I would suggest correcting the butchery and putting it back to TBI, but if you want to stay carbureted and assuming the in-tank fuel pumps were removed for 86 senders, then just use the 1986 wiring diagrams.

http://forum.73-87chevytrucks.com/smforum/index.php?topic=9072.0
,                           ___ 
                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10