2013 Tahoe Grinding noise coming from the rear end

[Langori]

Hi everyone,

I have a 2013 LTZ and when the ignition is ON, I hear this grinding noise coming from the rear end and it stops after 4 seconds. It sounds like something is engaging. Any ideas will be appreciated.

 

[OR VietVet]

Welcome to the forum from Oregon.

Sounds like a blend door actuator may be cycling. That is assuming you have rear a/c and heater. I should not assume, it is there. I think it will be around the passenger side rear wheel hump and see if you can duplicate and listen in there. I don't know what the rear layout is, so maybe in an overhead or left side. Others will chime in with more info.

 

[gooffeyguy]

Hi everyone,

I have a 2013 LTZ and when the ignition is ON, I hear this grinding noise coming from the rear end and it stops after 4 seconds. It sounds like something is engaging. Any ideas will be appreciated.

Air compressor for the autoride suspension. It will usually kick on a few seconds after starting to do a self test and/or inflate the rear shocks.

Its located behind the drivers rear wheelwell. Next time, start the vehicle and get out and listen in that area for a few seconds and see if that's it.

Sent from my SM-G930V using Tapatalk

 

[Langori]

Air compressor for the autoride suspension. It will usually kick on a few seconds after starting to do a self test and/or inflate the rear shocks.

Its located behind the drivers rear wheelwell. Next time, start the vehicle and get out and listen in that area for a few seconds and see if that's it.

Sent from my SM-G930V using Tapatalk

Thanks.