Yall' help me fix my stuff so here it is. Tech 2 says ( class 2 datalink malfunction ) and two dealers can't say what it is.Total stock no heat.
Thanks Russell.:ro)

What codes?

The class 2 data link could be grounded or shorted to power. It could be in a harness somewhere or a module could be the problem. Each circuit will have to be disconnected and reconnected while checking the data line with the tech 2.

I have seen alot of blown airbag fuses caused by a light yellow wire that chafes on the firewall bracket near the drivers left foot. Check that fuse (underhood) and check that area. It is the power supply for the SDM under the drivers seat.