2019 Tahoe Rear Suspension/Brakes creaking

[Sublimize23]

Hi all,
Very frustrated right now. I have made 2 payments on my truck, and it has 5500 miles on it (I drive a lot, plus moved cross country). Around the time of the first oil change, I began to hear this creaking like an old mattress or old box spring over speed bumps and low speed driving.
The noise sort of intensified to any time the body moves, I hear a creak coming from the rear. I hear it even more when using the brakes at low speed, and the body starts to roll, it is modulated by the brake pedal; the harder I hit the brake, the more the body moves, the more I hear it.

When I had the oil changed, the service advisor and tech agreed that they heard the noise, but couldn't diagnose it. I brought the car back about 2 weeks later because it was really beginning to annoy me. They had my truck all day, the service advisor again admits that they can hear the noise, and worked on it "for 5 hours" but couldn't figure out what the problem was. Their solution was essentially "live with it" until they can diagnose it.

Now, this is not an acceptable answer. It's brand new and is way too expensive for me to "live with it". I've left VM for the service manager, but haven't heard back.

I was so frustrated when I got home from the dealer that I hosed whatever I could see down with silicone spray, but of course that didn't help. What should I do here? I read another post about parking brake cables. Is there any obvious fix I could do myself?

 

[DWTahoe]

As you said, it's under warranty and it's too new to have those problems. If possible I'd try another GM dealer, they will all honor your warranty. Good Luck.

As for your problem, I don't have any good ideas. My front struts are noisy going over speed bumps but it's too old and has too many miles for me to warranty it. When I have to replace them I'll hope that fixes the issue. Otherwise, check all the bushings and make sure the end links and other items don't have an issue. If you have a buddy that can drive it and re-create the issue that may be your best bet in finding it yourself on a slow drive around the parking lot or driveway.

 

[DenaliBQ]

i know on mine the parking brake cable on the rear drivers side moved and was making noise once i adjusted it it was fine

 

[Blackcar]

I have 2017 that does same thing there is plastic bushing that emergency brake cable goes thru thatseems to rub on cable I put some grease on that area and helped with noise. That helped mine might try on yours.

 

[pwtr02ss]

Mine has a squeak in the rear when the suspension unloads rapidly, like hitting a big dip. Just a little "grunt" type sound. I need to check the emergency brake cable

 

[Sublimize23]

https://www.tahoeyukonforum.com/attachments/e-brake-20cables-20squeak-jpg.167805/

Which one of these?

 

[Sublimize23]

Well I believe I may have solved the issue. I zip tied the parking brake cables in the keeper, but the noise did not stop. I checked the top bushing and lubricated the hose wrapped around the brake cable with white lithium grease and that seemed to do the trick for now.

 

[cardude2000]

Well I believe I may have solved the issue. I zip tied the parking brake cables in the keeper, but the noise did not stop. I checked the top bushing and lubricated the hose wrapped around the brake cable with white lithium grease and that seemed to do the trick for now.

I wash my car. A lot.

All that washing cleans off oil and other lubricants too. I’ve had the creaking and they just oil up the rear bits and it’s gone. I have them do it every time I’m in.