Replacing diesel fuel lines on 06 250HD

[Steve-Maine]

I need to replace some lines near fuel cooler. Do I need to drain tank first ? Thanks

[hiking_mike]

You don't "have" to drain tank. The sending unit is on top of the tank. Draining just makes it easier to drop.

However, I have two Duramax trucks.

One had squirrel damage. It has a 3-inch body lift so while you could get to the fuel lines. The sending line was rusted and could not get it disconnected.

So, we dropped the tank, installed new sending unit, and the short feed and return line.

The other truck had a major leak in the return line that went into the cooler.

Thus, purchased entire Dorman stainless lines, hopefully avoiding rodent damage to my second truck.

If you go the Dorman, order online, it was about $1,000 cheaper than the local parts stores.

You have to get the 2 short feed and return lines at the sending unit in addition to the single part # for the Dorman Fuel lines.

 

Dorman 819-800 Rear Flexible Stainless Steel Braided Fuel Line Compatible with Select Chevrolet / GMC Models (OE FIX)

 

Dorman 919-874 Front Stainless Steel Fuel Line Kit Compatible with Select Chevrolet / GMC Models (OE FIX)

 

[Steve-Maine]

Thanks I will order the kits this week