Where could you find the Daytime Running Lamp sensor on a 1997 GMC Safari?

daytime running lamp (drl) don't use sensors. if yours don't works, start by checking the parking brake pedal's braket you should have a switch near the top. This switch send the signal to turn on/off the drl. if it works properly go under the hood to the the fuse and relay center (a black box on the driver's side) and check your power on the relay connectors.to see if your relay is good try to swap it wiht the horn relay. i hope this help daytime running lamp (drl) don't use sensors. if yours don't works, start by checking the parking brake pedal's braket you should have a switch near the top. This switch send the signal to turn on/off the drl. if it works properly go under the hood to the the fuse and relay center (a black box on the driver's side) and check your power on the relay connectors.to see if your relay is good try to swap it wiht the horn relay. i hope this help