Home/Shop by Part/Engine & Engine Management/Engine Sensors & Electrical/Knock Sensor Narrow The Number Of Models Shown By Telling Us The Year Filter Models by Year 1988 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 Choose your GMC Model C 1988 C1500 Truck Knock Sensor 1988 C2500 Truck Knock Sensor 1988 C3500 Truck Knock Sensor G 1988 G1500 Knock Sensor 1988 G2500 Knock Sensor 1988 G3500 Knock Sensor J 1988 Jimmy Knock Sensor 1988 Jimmy S-15 Knock Sensor K 1988 K1500 Truck Knock Sensor 1988 K2500 Truck Knock Sensor 1988 K3500 Truck Knock Sensor P 1988 P2500 Knock Sensor 1988 P3500 Knock Sensor R 1988 R2500 Truck Knock Sensor 1988 R3500 Truck Knock Sensor S 1988 S-15 Pickup Knock Sensor 1988 Safari Knock Sensor 1988 Suburban R1500 Knock Sensor 1988 Suburban R2500 Knock Sensor 1988 Suburban V1500 Knock Sensor 1988 Suburban V2500 Knock Sensor V 1988 V3500 Truck Knock Sensor