2006 Avalanche and Silverdado and Sierra trucks

[dna9656]

The switch for controlling the heat in the seats comes on and goes off intermittently, the radio doesn't shut off when you turn off the key and open a door. I realize the radio switch is in the door; I replaced the driver's door switch but still have the problem with it and 2 other doors.

It seems these trucks not only have notoriously bad grounds but switches as well. I have replaced the 4 X 4 low/high/auto switch, the headlight switch (and in a 1999 GMC I had plus the $ X 4 switch it it as well); is there any corporate knowledge about this truck having a batch of crappy electronic switches installed on the assembly line?