My dad just rotated the tires in his 2007 Pontiac Grand Prix, now the tire pressure monitor system keeps saying tire pressure low. All the tires are fine, which leads me to believe it needs to be reset but can't find it in the manual anywhere. He took it to the cheverolet lot and they said it needs to be reset but it will cost $20 dollars. My dad refuses to pay and was told by a friend he could reset it himself. So does anyone know how he would go about doing that?