Singlecab_vic

Do you have any advice I recently installed the wiring for am on a silverado LT and not happy with results the amp sounds really low and barley even hits. I grabbed the signal from the left and right pilar speaker wires from the running boards. ? any suggestions Do you have any advice I recently installed the wiring for am on a silverado LT and not happy with results the amp sounds really low and barley even hits. I grabbed the signal from the left and right pilar speaker wires from the running boards. ? any suggestions