Question about 1999 Pontiac Grand Am GT
If you have the 3.4 V6, the thermostat is under the throttle body. Just follow the upper radiator hose to the engine where it connects. Where the hose connect's to on the engine is the thermostat housing and the thermostat is under it. If you have small hands, you can remove the housing with a socket, u joint extension. If you have to remove the heat shield to the exhaust pipe, If it's still to tight for you. Your going to have to also remove the throttle body to get to the thermostat housing and remember to buy a new throttle body gasket. Good luck and hope this helps.
Posted on Jun 03, 2009
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Posted on Jan 02, 2017
SOURCE: thermostat location
On a GM six clinder it is in the housing that the upper radiator hose is hooked on the upper intake. It is very difficult to remove with the exhaust cross over pipe in the way but is possible with some time.
Posted on Dec 23, 2008
grab hold of the upper radiator hose, and follow it back to the engine block. The housing the hose is attatched is where the thermostat is hiding :)
Posted on Jan 14, 2009
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