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1973 - 1987 2WD GM Truck LS Hose & Line Kits

Fuel, cooler and steering lines for an LS in a 1973-1987 C10 or C15, or a 2WD Blazer, Jimmy or Suburban. Match the fuel kit to the pump in your square body EFI tank, pick the cooler kit for your automatic, and run the braided steering hose from the LS pump to the box.

  • Fuel kits for 255 or 400 LPH truck tanks
  • Cooler kits from Powerglide to 10L90E
  • Braided supply with nylon steering return

EFI tanks for 6 foot beds, 8 foot beds and the Blazer or Suburban are on the 1973-1987 2WD GM truck LS page. The 1973-1987 2WD GM truck LS install guide covers crossmember placement by transmission.

Steering hose kit for the LS pump

Back to the square body swap

What comes in the truck line kits

  • Both fuel kits use PTFE lined stainless braided hose with a black cover, plus clamps, fittings and connectors.
  • The 255 LPH kit uses an OE style filter and regulator in one housing that holds the GM LS figure of 58 psi.
  • The 400 LPH kit carries its own filter and an adjustable regulator with a vacuum and boost port.
  • Steering kit: a braided high pressure supply line plus a nylon low pressure return.

1973-1987 2WD truck line fitment notes

  • C10 and C15 tanks come for 6 foot and 8 foot beds, and the Blazer, Jimmy and Suburban tank is separate. Each comes with a 255 or 400 LPH pump.
  • A 255 LPH truck tank takes 6601-00. A 400 LPH truck tank takes 6605-00. Both kits are made for returnless rails.
  • The guide sets the crossmember outer brackets fore or aft to suit your transmission, so route cooler lines once it is in place.
  • Running a low mount A/C compressor? The guide says it needs custom made A/C lines, which are not part of these kits.

Notes from the 1973-1987 2WD GM truck LS install guide. Kit contents and tank pump sizes come from BRP product names and descriptions.

1973-1987 C10 LS hose and line FAQ

Which fuel line kit goes with a C10 EFI tank with a 255 LPH pump?

The 6601-00 kit. It suits the 255 LPH tanks for 6 foot and 8 foot beds and the 255 LPH Blazer and Suburban tank.

I bought the 400 LPH 8 foot bed tank. Which fuel kit?

Use 6605-00. Its adjustable regulator is meant for the 400 LPH pump used on supercharged or high horsepower trucks.

Which cooler line kit fits a 4L80E in a square body?

The 4L80E kit, which also covers the 4L85E. It runs from the transmission to the radiator.

Is there a C10 kit for an early LS with a return style rail?

Not right now. Both active fuel kits are for returnless rails, and the return style kit they mention is not offered.