On the righthand side of the firewall, about the size of a fat cigarette lighter. IIRC dual tank trucks have one for each tank.
Where Is The Fuel Pump Relay Located On A 1987 Chevy Silverado?
No idiots its inside the dang fuel tank.. I own a 1987 chevy silverado and have replaced the filters on both my pumps. Now the pumps wont turn on and ill have to drop the tanks again and replace the pump.