Fleece Performance FPE-HAR-MU-PT-14 Fleece Performance 15-19 fits GM 2500/3500 (w/Allison Trans) Transmission Input Speed Sensor Pigtail. Weight : 0.13 lbsFleece Performance 15-19 GM 2500/3500 (w/Allison Trans) Transmission Input Speed Sensor Pigtail.