I have a 1999 Chevy S-10 pickup. When I get low on gas a "low fuel" warning light appears. About how many miles can I drive before I run completely out of fuel? I don't have the owners manual for the truck. Thanks...

Approximately 20 miles. It's not a good idea to do, however. You risk sucking up all the crud into the fuel pump and filter, which can burn out the pump. The pump needs enough fuel in the tank to keep it cool.