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Not likely. It's probably the Water Temperature Sending Unit located on the engine, or the signal processor on the instrument panel (not likely).

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Q: Why would the temp gauge jump around and low coolant light is lit on a 2000 Pontiac Montana if there is no heat but fluid levels are good could this be a blown head gasket?
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Related questions

What causes a 2000 Pontiac Montana to overheat and have no heat at all?

Low Coolant. Poor coolant circulation. Intake gasket. Head gasket.


What causes the hot coolant temp light to come on the 2002 Pontiac Montana?

You are OVERHEATING. You most likely have an intake or Head gasket problem.


What would cause Oil to get in coolant but no coolant in oil in 2002 Pontiac grand am gt?

blown head gasket


What is the average cost of replacing intake manifold gasket on a 2003 Pontiac Montana 3.4?

parts and labor should run around $650


Need to identify antifreeze gasket leak 3.4 L gm v6 2001 Montana?

the Pontiac Montana is known for its manifold gaskets which have rubber rings around the cooling ports. the dexcool system is high pressured and leaks in the rubber rings can cause coolant to escape through the gasket. sometimes this is seen as steam on the outside in little puffs but sometimes the coolant jets inside the engine where it can seize and actually break the crankshaft. have the gaskets replaced with aftermarket parts


Can a head gasket leak without overheating or coolant loss?

It is possible that the gasket could leak between cylinders. The overheating and coolant loss would happen if the gasket was failing around the coolant passages.


What is the correct way to insert a thermostat on a 1997 Pontiac sunfire 2.2?

Remove the thermostat housing screws and separate the housing, exsposing the thermostat and coolant, remove old thermostat and gasket. Reinstall new thermostat, gasket and coolant.


Is it common for radiators to leak on a 2002 Pontiac Montana and how would you replace one?

It is typical for the 3.4 liter motor to develop head gasket leaks. It usually shows up as a low coolant condition and then develops into a temperature problem. You should have it pressure tested to see if it is the radiator or the head gasket. Answer No it is not common for rads to leak. Most likely it is not the rad unless you have actually seen it. It is probably the intake gasket which will leak coolant. This is a very common problem on these vans.


How many hours to change intake manifold gasket on 1999 Pontiac Montana 3.4L?

5 to 7 depending on experience.


On a 2000 Pontiac Montana what order do push rods go?

Exhaust are longer than intake. Exhaust goes thru the loop in the gasket, intakes set outside gasket.


Why would a 1998 Pontiac Transport Montana over heat when stopped after the thermostat coolant sensor water pump radiator intake manifold gasket radiator cap and all of the lines have been changed?

I have a 2000 Pontiac and my was doing the same thing. It turned out to be my heads were warped. You can smell it coming out of your tail pipe if it is your heads.


How do you know if you need a new head gasket or a thermostat on a 1995 Pontiac grand prix?

You will need a new head gasket if you see engine coolant in the oil. I don't know about the thermostat.