2014 Silverado LTZ BOTH Heated Seats not working but cooled seats work

[Brad Chesney]

I actually have a subscription to ALLDATA, and the only info it has says it’s under the passenger seat. You can actually see where it would go, but it’s not there. The glitch in the system is the GM Vin decoder at dealership parts departments shows this part belongs on the truck, but if the truck has cooled seats, it’s definitely located in another location, if used at all. 

[tbarn]

Heated only seats (KA1) have the module under the passenger seat. Heated/cooled (KB6) seats are controlled by each individual blower assembly.