Upstream Oxygen O2 Sensor 234-4019 O2 Sensor 1 for 1996-1998 Chevrolet C2500 Base - 7.4L, for 1999-2000 Chevrolet C3500 LS - 5.7L, for 1996-2002 Chevrolet Express 1500 Base COMPATIBLE WITH OEM:13027, 234-4019, 19178934, 19178942, 25160540, 25312191, 25315814 Length (Sensor to Lead): 400 mm (15.74 inch).Wires: 4 Upstream Oxygen Sensor 234-4019 For 1996-1999 GMC C/K1500 2500 3500 P3500 Front Heated Oxygen O2 Sensor 1 for 97/99 Chevrolet C1500 Suburban 5.7L Trans Code 4L80E Please check the description or use the year/make/model drop down bar and interchangeable part numbers to confirm the compatibility before purchase. Warranty: 1 year unlimited miles.