2005 Chevy Aveo Overheating / No A/C / No Cooling Fan Case Study PT1 Inspection & Diagnosis 

You need room for expansion. If you have a leak you will have room very soon. /K&K

I would start by unplugging the reverse light sensor "Back Up Light Switch" , its located on the transmission near the shifter cable. If the reverse lights turn off I would replace the "Back Up Light Switch," if they don't turn off you would need a schematic to find which wire or module interfaces the back up lamps and go from there. As far as the door light sensor it could something as simple as a defective door close/open switch. That one you need to unplug one door switch at a time and drive hard to see if you found the bad switch. A lot of these newer door switches use a magnet to activate and deactivate the light module. Normal resistant tests won't come up with anything if the switch is just weak and G forces can make the switch think the door open. I hope this information will help you fix these two issues. /K&K

@@KNKRNR can't thank you enough for the speedy response. I'll start right away with the information you gave me. That's again!

Be sure to check your sensors that's what was wrong with my blinkers and headlights started giving me issues but worked it was the sensors going out.

Dex-cool gets a bad wrap because people don't service the cooling system every 5y/ 50,000 miles. Most people run the OEM Dex-cool coolant for 10 plus years / 150,000 and that is where problems with Dex-cool become an issue. My suggestion if you use Dex cool is to change it every 4 years or 50,000 miles which every comes first. Other option is to use Autozone mix with any color coolant. Something be sure to change the coolant every 4 years or 50,000 miles which every comes first. /K&K

@@KNKRNR I can't believe you responded!! Thank you!

Isn't facetime an Apple app? I'm an Andriod user. I might be able to answer your question if you having an issue with the Aveo cooling system. /K&K