Ultimate Fuel System Guide for LS-Swapped 1973-87 Chevy/GMC Squarebody (C10, K10, Blazer) If you're planning an LS or EFI swap in your 1973-1987 Chevy C10 or K10 Squarebody, this guide covers everything you'll need to build a reliable, high-performance fuel system. From tanks and pumps to hose kits, filters, and dual tank solutions—we've got you covered.. A strong and secure wiring diagram for dual fuel tanks will help ensure safety, reliability and efficiency for your trip. When installing a dual fuel tank system, it's important to understand the parts involved, the wiring requirements and the different components that make up the wiring diagrams.
![[DIAGRAM] Gas Dual Tank Wiring Diagram 1984 Chevy Pick Up](https://i.pinimg.com/originals/71/e0/19/71e01954ea117e1ca9710489a4eabbe9.jpg "[DIAGRAM] Gas Dual Tank Wiring Diagram 1984 Chevy Pick Up MYDIAGRAM")
![[DIAGRAM] Gas Dual Tank Wiring Diagram 1984 Chevy Pick Up](http://www.justanswer.com/uploads/rlroot/2007-06-21_142504_gas_switch_2.jpg "[DIAGRAM] Gas Dual Tank Wiring Diagram 1984 Chevy Pick Up MYDIAGRAM")
![[DIAGRAM] F150 Dual Fuel Tank Diagram](https://www.2carpros.com/images/question_images/263718/original.jpg "[DIAGRAM] F150 Dual Fuel Tank Diagram")
76 aux tank wiring diagram. Just remember there are 2 Tan wires at the DPDT switch. One for the gauge and one from the main tank (pass. side). Fuel gage wire is in the center position (pin 4) opposite of the pink/black (power (pin 1)). Green wire for the solenoid (pin 2) is above pink/black and the 2 tanks are above/below the fuel gauge wire.. Plumb 3/8-inch feed line from the main tank, through one of the pre-filters, to the main fuel pump and on to the motorized valve. Plumb a second 3/8-inch feed line from the auxiliary tank, through the pre-filter, to the auxiliary fuel pump and on to the motorized valve. Plumb a third 3/8-inch line from the motorized valve, through the post-filter, and on to the EFI System.