Dana engineering-approved for fit, form and function. 2007 Pontiac G6 Engine: 3.6L V6; Thermostat Case to Cylinder Head; Replaces OE Part Number(s) 12592527;. 2008 Pontiac G6 Engine: 3.6L V6; Thermostat Case to Cylinder Head; Replaces OE Part Number(s) 12592527;.