[bobo1erv]

Update change the temp sensor with a ac Delco. Problem still happened again. Gotta be something in the computer

[ctrlz]

Originally Posted by bobo1erv

Update change the temp sensor with a ac Delco. Problem still happened again. Gotta be something in the computer

Is there a fan speed control module? Sometimes mounted near hood latch or on the fan housing. I will check the repair manual later...
This has been the culprit for fan problems with some of my previous cars.

EDIT: Manual shows K22 Cooling Fan Control Module. Located top rear edge of the fan structure. The fan wiring plugs into this.

DIAGNOSTIC INFORMATION AND PROCEDURES > DTC P0480, P0691, OR P0692
(LT1): COOLING FAN SPEED > CIRCUIT/SYSTEM DESCRIPTION

The engine cooling fan system is composed of one electric cooling fan and a cooling fan control module.
The engine control module (ECM) controls the fan speed by sending a pulse width modulated (PWM)
signal to the cooling fan control module. The cooling fan control module varies the voltage drop across
the cooling fan motor in relation to the pulse width modulated signal, which enables cooling fan operation
at variable speeds. The ECM will only operate the cooling fan at certain percentages to prevent
undesirable noise and vibration. The cooling fan control module is thermally protected to prevent module

damage in the case of a short circuit condition in the cooling fan motor.

[bobo1erv]

Update:... it was the thermostat... they sent me a 160°F thermostat. Order a 194°F thermostat hasn't went back into safe mode

[lt4camaro]

Originally Posted by bobo1erv

Update:... it was the thermostat... they sent me a 160°F thermostat. Order a 194°F thermostat hasn't went back into safe mode

Great to hear and as I predicted was the issue. BTW, each thermostat is marked on the bulb end the temp in celsius not degrees.