issue High frequency noise coming from dash when in 4WD

Sgtusmc · February 25, 2015

I think GM did sort of solve the problem within their response. " only heard when the radio and HVAC and other accessories are off". So what GM is saying to us is that if we just turn our radios up and crank the fan, the noise is gone! Thanks GM and your engineers for all the hard work you put into solving this problem.

Michigander98 · February 25, 2015

Unfortunately, I can still hear the noise with the radio and fan turned up. I've also listened to a truck with sound deadening insulation installed around the transfer case module and could still hear the noise (no change really).

Rme2513 · February 26, 2015

Mine also dose it but only for a few seconds did not think much about it

Humidex · February 28, 2015

Anyone know exactly where the TCCM is and how to access it on a 2014??

tbarn · February 28, 2015

In the passenger compartment, under the instrument panel, right of the accelerator pedal

Humidex · February 28, 2015

http://imgur.com/G9fv1tG

Is that it? Just right of the pedal

langston1726 · March 1, 2015

Does the noise sound like chains dragging to any of you guys?

Sent from my iPhone using Tapatalk

Kcitti · March 1, 2015

Nope- it sounds like electrical. I tell me wife it sounds like a tv is on. Just that high pitch electronic noise, cutting in and out.

Humidex · March 1, 2015

Yes kind of like an old crt tv when it was turning on.

Kcitti · March 4, 2015

anyone have any updates?

Michigander98 · March 6, 2015

This isn't a total fix, but have your dealer wrap the transfer case module in two layers of sound deadening insulation. It doesn't completely eliminate the sound, but makes it very tolerable. The only time I can hear it now is if I turn everything off and hit the gas pedal. Even then it is very faint.

Humidex · March 6, 2015

Michigander98 is there any way you could take a pic of it for me?i don't exactly know where it is and I would love to just apply sound deadening material myself.