Where is the thermostat located in a 1998 Pontiac Transport Van?
The thermostat is taking long time to change. Is situated in
right side of the engine (from front of vehicule). Just follow the
big hose from the radiator and you will see the headbow. It's
between the exaust manifold extension and the engine just below the
throttle body. If you want to change it and make it easier, you
will have to remove the throttle body (consist in 3 bolts). Once is
done, just remove the headbow and that's it. (the job is
approximately 1 hour and half for professionnal and more thant 3
hours for user).
http://car.justanswer.com/uploads/JHoop/2008-05-03_202404_Thermostat.pdf