Lingenfelter 160 Degree Thermostat - LS1, LS6, LQ9 1997 - 2003 4.8 L, 5.3 L, 5.7L, 6.0 L

Reducing coolant temperature will help produce more horsepower and improve your performance and drivability. The thermostat is an easy to install component and requires no modifications. Late 2003 and newer trucks will use a different thermostat.