Commodore Thermostat ( low temp 71°C ) Aug 2003 - Aug 2004, 5.7L, V8, 16V, OHV, MPFI, VYII, 245kW, EngCode: LS1 GEN III Thermostat ( low temp 71°C ) Feb 2004 - Jan 2006, 5.7L, V8, 16V, OHV, MPFI, VZ, 235kW, EngCode: LS1 GEN III Thermostat ( low temp 71°C ) Feb 2006 - Aug 2007, 6.0L, V8, 16V, OHV, MPFI, VZ, 260kW, EngCode: L76 GEN 4 Thermostat ( low temp 71°C ) (up to 08/09) Aug 2006 - Aug 2010, 6.0L, V8, 16V, OHV, MPFI, VE, 270kW, EngCode: L98 GEN 4.