Rear of Vehicle leaking fluid

The time varies if the upper intake only needs replacement the time is 1.8 hours and if both the upper and lower need replacement the labor time is 5.3 hours and the intakes are available here http://www.napaonline.com the thermostat is in the intake so the time should be included, put in your year make and model and under parts search put intake manifold, Hope this helps

I had my 2002 Denali manifold replaced at the dealer and it cost me $755. The thermostate was replaced as well.