mnotx

What is the best way to drain old gas from a 2003 Corvette? This is the old 2003 fuel system, not the mid-year updated system. With the twin tanks and multiple hose choices, I am not sure which hose to disconnect to get both tanks drained. A pic would be very helpful, too.

Thanks!

mnotx

Bump

mnotx

Bump. Gotta be some techs out there that know this one.

fixvet

For expert help go to www.thecorvettemechanic.com

bikerjim2000

I would find the fuel pump relay/ and schematic. Remove the relay and then you then use a wire "jumper"and power existing fuel pump to pump it all out thru existing fuel system.... This is a method I have used before but not on my C5...

Or on that (early) model you can pull both sending units at the bottom of both tanks and take a major gasoline bath.
either way be outside with good air circulation!!! Good Luck!

mnotx

Thanks to both of you!

Chicago1

Decide where you want the fuel to come out from either under the car from the line or the rail . If you do the rail you have to take the schrader valve out then size up whatever hose you want to put on it to a container. Now go to the under hood fuse panel either Relay 37 I believe or 35 look at the fuse box schematic under the hood to verify. Looking straight down and standing on the passenger side with battery to the left look at where the relay was. jumper upper left and bottom right. So you should have them diagnol . Now Turn key on and you will hear the pump running and fuel will come out whichever end you did. When empty turn key off take jumper out reinstall relay and whichever lines you disconnected.