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Old 05-28-2019, 08:55 AM   #1
ASTEVENS
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"Low Coolant Level" on DIC - 2007 Z51

Folks: While doing my usual 50-60 mile trip over country roads this past Saturday, I encountered "Low Coolant Level" message on my DIC (Driver info center). Temperature was in the 70's and I had the air conditioning on set at 68 - auto. Since I was doing a lot of twisty roads and at speeds between 40 - 60 MPH, reving to downshift for tight corners like I normally do, I was surprised to see the message. Looking at the coolant temp it read 186 - 187 deg F, and oil temp 220 deg F. I had no warning lights flash on the dash or experience any difference in engine performance. No steam from under the hood either. Immediately got on the freeway and headed back home with the engine coolant temp on the DIC so I could watch it. Coolant temp diminished to 180 - 181 eg F at approx. 70MPH on the way home. Upon getting home and letting the engine cool off, I observed no coolant leaks, no further DIC warnings, no low level of coolant in the overflow tank, and upon placing the vehicle on my code scanner no codes being exhibited and a clean scan. I ran the car again in city traffic and experienced no "Low Coolant Level" showing up on my DIC. Since the ECM (Engine control Module) on start up sends RPM + Coolant Temp through the BCM ( Body Control Module) to the HVAC module which then compares the engine coolant temp and engine Rpm to determine if there's a low coolant level. ( all this from the GM Corvette shop manual that I purchased with the car) Should i be looking for a faulty thermostat, engine temp sensor? I have the Z51 opted 6 spd manual with additional differential and transmission cooling. Any suggestions would be deeply appreciated
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Old 05-29-2019, 03:16 AM   #2
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Coolant level Okay, temps okay (fans aren't even on at these temps), no codes and it hasn't happened again. I'd say watch it and then chalk it up to a fluke it if doesn't reappear
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Old 06-01-2019, 08:54 PM   #3
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Your coolant temp seems a bit low. Have you changed to a lower than 195f thermostat?
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Old 06-14-2019, 08:55 AM   #4
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Quote:
Originally Posted by autowiz View Post
Your coolant temp seems a bit low. Have you changed to a lower than 195f thermostat?
No. I am still on the original thermostat. I had the coolant changed about 3 years ago. Thanks for the suggestion. I will look into this. No reoccurrence of the Check Coolant Level message appearing on the DIC since I posted. Probably a glitch.
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