On the tranny side for 3.4l. Follow the upper rad hose to the thermostat housing. You have 2 bolts to remove & the upper rad hose clamp.remove the air intake duct.Partially drain coolant.remove exhaust crossover pipe. Removebolts & thermostat housing. Next remove the thermostat. Clean both surfaces. Install in reverse order. Onthe 3.8l, it isagain at the end of the upper hose behind the engine mount. Good luck!
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