Mar 27, 2023 · I did it myself in an afternoon. It wasn't hard. Make sure you replace the thermostat and the temp sensor.

Sep 24, 2020 · The thermostat assembly with the extension pipe shows up as not available and out of stock at many sites. In any case, if you viewed the video, just the thermostat itself can …

May 16, 2023 · It will come back and happen more often because the thermostat will get stuck more. The only fix is to replace the thermostat and housing. $1,400 repair at the dealer.

Feb 24, 2017 · Has anyone replaced a thermostat on the 2017 3.6L Acadia? I am experiencing temp pegged on cold, no A/C, cooling fan running all the time with P0128 code...

Jul 15, 2024 · I ordered one online and the GM box listed part number #12678780 but inside the box on the thermostat part number 12678779 was stamped on it. Is this the updated version …

Jul 31, 2022 · I used a genuine ACDelco thermostat. Also replaced the ETC sensor and the pigtail that goes to it, just in case.

Jun 23, 2024 · What I have heard and verified is that GMC specs a different thermostat to be used in the replacement than it was originally built with. I’ve also read that the reason for the spec …

Nov 17, 2025 · Mike, I think you just saved me a whole weekend (full of cursing) and $150 parts to replace the thermostat and temp sensor myself, or $700 at a shop, or $1300 at my local …

Apr 10, 2014 · So it sounds like you’re saying the dealer service could have replaced the thermostat only and would have solved my issue. So why would they replace the whole unit …

Jun 14, 2016 · I typically do my own tinkering, but had a shop replace my timing chain last year, and didn’t realize the foam cover was missing until replacing my thermostat last week.