GM Truck Club
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 2 of 2
  1. #1

    Default 89 Silverado TBI Dual gas tank issue.

    Typo: its an 87, not an 89.

    So I filled up the left (driver side) gas tank after I had been using the right tank, though not to empty. After I had filled up, I started the truck then switched to the left tank. Thats when the truck shut itself off. The fuel gauge shows a full tank, but it wont start on that tank. Could it be the sending unit? Or did I screw up the Fuel Injection by switching tanks while the engine was running?

    I have a feeling I wasted $60 filling up a tank I may have empty soon....

    Also, the left tank was not empty prior to filling it up. The original owner told me he had just replaced the fuel pumps on both tanks. He's a mechanic himself, so I trust he would have tested them, making sure they worked.
    Last edited by Crazze; 06-15-2012 at 03:39 AM. Reason: added info, typo
    Project Truck - Daily Driver
    1987 Silverado R20 - Camper Special

  2. #2
    Sr. Engineer
    Join Date
    Oct 2010
    Indianapolis, In


    I would do the usual fuel pressure checks and work back from there. Do you hear the usual fuel pump whir or whine when first keyed on? Check fuses and relays and such. I do not know how your tanks are switched, is it a switch or valve that you actuate. I would not worry about damage to fuel injectors as I am sure you should be able to switch tanks while under way without problems. Are you able to switch back to the tank it was running on and be able to start and run?
    2000 GMC YUKON SLT, 5.3L tow pkg, G80 rear/w 3.73 gear

Similar Threads

  1. Fuel tank venting issue
    By boycbronco in forum Chevy Suburban Forum (GMC Yukon XL)
    Replies: 4
    Last: 08-03-2011, 05:22 AM
  2. '96 dual fuel tank issue
    By zebra308 in forum GM Powertrain
    Replies: 13
    Last: 12-22-2010, 05:34 PM
  3. Need new 2nd dual gas tank
    By joemud in forum Performance & Fuel
    Replies: 3
    Last: 02-23-2009, 09:01 AM
  4. Coolant Recovery Tank Issue
    By mavrickwax in forum Chevy Truck Accessories
    Replies: 3
    Last: 03-21-2008, 02:16 PM
  5. Dual fuel tank burbs?
    By unplugged in forum Chevy Suburban Forum (GMC Yukon XL)
    Replies: 9
    Last: 09-26-2007, 06:16 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts