Coolant Control Valve

BadRobot62 · Jul 15, 2021

Just had the coolant control valve replaced on our 2021 Yukon Diesel . There is a TSB out for this according to the Dealership. What I got was a check engine light and a warning from OnStar. Has anyone else had this.

OR VietVet · Jul 15, 2021

I don't own one of the new rigs but I read all the threads about them and I have not seen anything about this problem. By the way, likely a typo, but it is TSB and not TBS.

Technical Service Bulletin.

Glad it is fixed.

reddirtdigger · 2024-12-24T09:35:53-0500

BadRobot62 said:
Just had the coolant control valve replaced on our 2021 Yukon Diesel . There is a TSB out for this according to the Dealership. What I got was a check engine light and a warning from OnStar. Has anyone else had this.

Were your symptoms no rear heat? Did you get a Malfunction Indicator Light / error code or did you just notice it? I am having no codes, but no rear heat. I think my actuators are working, and feel no heat on coolant return line coming from rear hvac.

Coolant Control Valve

BadRobot62

TYF Newbie

OR VietVet

Multnomah Falls

reddirtdigger

TYF Newbie

Similar threads

Forum statistics

Latest posts