Speed Sensor Seal
Fits 4WD; Sierra 1500 HD; I.D. 20MM; Electric Shift 2 Speed Transfer Case (NP1),2 Speed Manual Shift Transfer Case (NP2),Active 2 Speed Push Button Control Transfer Case (NP8)or 4WD or AWD; I.D. 20MMor 4WD or AWD; Trans.Code 4L65-E; 4 Speed Automatic Trans.; I.D. 20MM