2006 Chevy Equinox Temp Gauge and Trailblazer Heater Core

2006 Chevrolet EQUINOX … AFTER A COOLANT SYTEM FLUSH MY TEMP GAUGE SHOWS A COOLER TEMPSERATURE THAN USUAL..CHECK ENGINE LIGHT HAS COME ON…OTHER THAN THAT CAR RUNS FINE ? ANY IDEAS ON WHAT IS CAUSING THIS.

ProTech:
You probably need a thermostat now. After the flush, debris has gotten clogged in the thermostat and it is stuck open…that will set a code as well.

OK THAT SOUNDS PRETTY SIMPLE IS THIS A COMMOM PROBLEM.?? BECAUSE CAR HAS ONLY 3500O MILES.

Yes it is very common.

THANKS FOR YOU HELP!

Chevy Trailblazer

When I first start my Trailblazer up and take off it’s like I hear water running in the dash area for about 5 minutes. Could you tell me possibly what it might be?

Protech:
What you are hearing is the coolant rushing through the heater core, most times this is normal, but other times it can mean you have air pockets in the cooling system. Do you have good heat from the vents?

Yes. What do I need to do?

If you have good heat, you probably have nothing wrong. I wouldn’t worry about it too much

Thank you very much. Is the Heater Core located under the dash?

Yes it is. It is a very big job and I would not recommend doing it yourself. Take it to a mechanic or see our guide to Chevy Trailblazer Heater Core Replacement .

Thermostat

What is the best way to access the bottom bolt on a thermostat for a 03 trailblazer 4.2. 6cyl. I am trying to replace my thermostat on a 2003 Chevrolet Trailblazer 4.2. 6l. I can’t reach the bottom bolt. What is the best way to access this bolt and what tools do I need?

Mechanic JK:
The best way is through the wheel well opening on the left side. You can get in there with a 10mm socket with a swivel on an extension pretty easily. Kind of an odd bend, but definitely do-able. I am trying to replace my thermostat on a 2003 Chevrolet Trailblazer 4.2. 6l. I can’t reach the bottom bolt. What is the best way to access this bolt and what tools do I need?

Thanks so much.