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The thermostat is blocked by the intake manifold. It's not an easy job and most likely your are trying to fix a temperature gauge the fluctuates. If that's true then you need head gaskets. The 3400 motor is known for them going and the first indications is the temp varying and missing coolant that has not leaked on the ground.
What else can I help you with?
Why is your 2000 Pontiac Montana blowing cold air?
You should check the thermostat and the fuse for the heater.
Heater core replacement 2002 Pontiac Montana?
Where is the heater core for a 2002 pontiac montana
What causes a Pontiac Montana to blow cold air?
Could be low coolant, stuck thermostat, bad heater control head (if climate control)
Where is the block heater cable on my 2001 Pontiac Montana?
The 2001 Pontiac Montana block heater cable can be found in the front of the vehicle. You can access the block heater cable through the front grill.
How do you flush the heater core on Pontiac Montana?
this is the stupidest website ever
Block heater on pontiac g6?
The Pontiac G6 block heater is located on the right hand side of the engine. The block heater can be located by following the block heater cord.
Where is the thermostat located on a 2000 Pontiac Grand Am?
Under the radiator hose that meets the top of the engine under the throttlebody if you follow the heater hose from firewall on the driverside toward the engine it goes to the thermostat housing.
Where are the heater hoses on a Chevy Venture 1997?
Not a fun job to do... They come from the heater core located on the passenger side of the firewall. becasue it's a Chevy Venture/Olds Silhouette/Pontiac Montana... this job is not easy.
Where is the engine block heater located on 2006 Pontiac g6?
I can't find my block heater plug on my pontiac G6 2006,,,Where is it? Maybe it does not have a block heater.
Where is the thermostat located on a water heater?
The thermostat on a water heater is typically located near the bottom of the tank, behind a panel or cover. It regulates the temperature of the water inside the tank.
Where is the heater inlet hose on a 1994 Pontiac Grand Prix?
its located on the heater core
Where is the heater fan resistor located on a 2003 Pontiac grand am?
where to find heater resistor 2004
