Question about Cadillac Cars & Trucks
It sounds like you have a blown cylinder head gasket, have a local shop check this out for you.
Posted on Nov 01, 2012
Try changing your coolant temperature sensor. It may be bad or out of range. Can also cause hard starting and running poorly.
Posted on Nov 01, 2012
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Posted on Jan 02, 2017
Cooling Fan Temp Sensor is the First thing You Check (with what you have described) Cooling Fan Should ALways come On When The A/C is turned On as A/C Adds A Load to Engine, If Temp Sensor is Faulty it Will Not Give GROUND Signal to ECM >For COOLING FAN >RELAY to Give ground and turn ON The Fan.
There ARE 2 temp Sensors that Serve Different Purposes 1 is for Dash READING GAGE & Or TEMP LIGHT the Other is For ECM or Fan Relay (SAME Thing) you Said>""can disconnect the sensor and fan continues to run" < This Leads me to think you Changed the Wrong One. Not Questioning your Skills Just Here to Help.
TEMP SENSOR FOR 3.1L V6 is Located upper RH rear of engine compartment, near exhaust system. Temp SENSOR for 2.3L Engine is Located in LH rear of engine compartment.
I Hope this Helps Lead you to a NON-OVERHEATING Pontiac.
Good Luck and Have A Great Evening. rejakwilson
Posted on Feb 04, 2009
replace coolant sensor connector?if so can u get a thermo lazer gun to check the block temp? this will tell u if the gauge is incorect,,,go ahead a bleed all the air out of cooling system and see if that does the trick
Posted on Jul 05, 2009
If there were no codes present upon initial inspection, check for fuel pressure and replace the pump if nothing or little is present. This is most likely with no codes. Also replace the filter. Let me know if you need instructions on pump replacement.
Posted on Oct 24, 2010
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