2009 LTZ Seat Memory Heat/Cool not working ?

[VanillaGoorilla]

Seat Adjustments work, but not the memory function?

It sounds like the fan works, but no heat or cool?

Anyone else had this issue ? Point me in the right direction please.

 

[petethepug]

Welcome and congrats on getting a truck with a/c - heat’d seats. Starting in 11’ GM killed the a/c function and used standard resistance heated mats and ventilated cabin air.

The hvac seats in the 09/10 Tahoe/Yuke/Burb are still really misunderstood. There’s next to no published info on their repair or part breakout diagrams.

Here’s the best one I’ve found …

Drivers heated seat

Drivers heated seat not working, but cooling mode does work. Passenger side both heat and cool work. The controls work fine and stay on like it would heat but doesn't. What generates the heat on the heated/cooled seats? Is there a peltier type device I'm overlooking? I went to replace what I...

www.chevyavalanchefanclub.com

I’ve also heard that having faults with the dash hvac like bad blend door motors will knock one or both seats out.