Noise When Backing

Zip2014 · May 22, 2019

My truck in the mornings when I start to back out sounds like loose lug nuts in cap. But all are tight and on the studs. It does not do this after backing just a short ways. Any ideas?

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CamGTP · May 23, 2019

Possible you are hearing the ABS self test.

I used to hear it all the time on some of previous GM vehicle, not so much or at all with my 2016. Though I haven't been listening for it.

Zip2014 · May 23, 2019

Possible you are hearing the ABS self test.

I used to hear it all the time on some of previous GM vehicle, not so much or at all with my 2016. Though I haven't been listening for it.

Thanks

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2016 Sierra Owner · May 23, 2019

I get the same noise when turning to back into somewhere. I took my truck in and told them about this during an oil change. I even checked it before I pulled into the service department that morning. Well they changed the oil and rotated the tires then came and got me so I could test drive with their mechanic. It did not make the noise one single time. The advisor said it would be documented and I took off. I still hear it from time to time though.

djw88 · May 23, 2019

wheel bearing dust cap is another thing to check.

Lsgun1 · May 23, 2019

17 minutes ago, djw88 said:

wheel bearing dust cap is another thing to check.

Eh? These trucks have had sealed bearings for like 20 years.

kickass audio · May 23, 2019

3 minutes ago, Lsgun1 said:

Eh? These trucks have had sealed bearings for like 20 years.

I think he means the little metal cap that GM puts over the CV nut on the front wheels. That shouldn't be loose since they are super tight from the factory with how they fit in there.

I would play with the parking brake maybe and see if it helps any. Does it do it regardless if it was cold or warm out? How about if it is humid or it just rained the night before? Maybe you have a little surface rust on the rotor but it is making noise when you first start to move. There should be no way your brake dust shields are rusting and making it come into contact with the rotors at your age so I would rule that one out.

Something I would check is that all of your brake bolts are nice and tight and that the pads are able to move freely. I would also suggest trying to gently ride your brakes when you back up instead of letting go of the brake. See if it makes any difference when the brakes are applied a little or not.

djw88 · May 23, 2019

31 minutes ago, kickass audio said:

I think he means the little metal cap that GM puts over the CV nut on the front wheels. That shouldn't be loose since they are super tight from the factory with how they fit in there.

I would play with the parking brake maybe and see if it helps any. Does it do it regardless if it was cold or warm out? How about if it is humid or it just rained the night before? Maybe you have a little surface rust on the rotor but it is making noise when you first start to move. There should be no way your brake dust shields are rusting and making it come into contact with the rotors at your age so I would rule that one out.

Something I would check is that all of your brake bolts are nice and tight and that the pads are able to move freely. I would also suggest trying to gently ride your brakes when you back up instead of letting go of the brake. See if it makes any difference when the brakes are applied a little or not.

Yes, I mentioned it because it happened to a friend of mine. Couldn't figure out want the noise was turned out it was that cap.

newdude · May 23, 2019

I see you aren't in a northern salt state, but check your parking brake shoes. We get tons of issues up here in NY with them, mostly on trucks where folks don't ever use the parking brake.

Zip2014 · May 23, 2019

I think he means the little metal cap that GM puts over the CV nut on the front wheels. That shouldn't be loose since they are super tight from the factory with how they fit in there.

I would play with the parking brake maybe and see if it helps any. Does it do it regardless if it was cold or warm out? How about if it is humid or it just rained the night before? Maybe you have a little surface rust on the rotor but it is making noise when you first start to move. There should be no way your brake dust shields are rusting and making it come into contact with the rotors at your age so I would rule that one out.

Something I would check is that all of your brake bolts are nice and tight and that the pads are able to move freely. I would also suggest trying to gently ride your brakes when you back up instead of letting go of the brake. See if it makes any difference when the brakes are applied a little or not.

Weather has not been a factor that I know of as do not hear unless widows down. Only does after sitting all night never after driving and parking 4 or 5 hrs.

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sldhead700 · May 23, 2019

I see you aren't in a northern salt state, but check your parking brake shoes. We get tons of issues up here in NY with them, mostly on trucks where folks don't ever use the parking brake.

Just curious, (as I'm one that never used the parking brake in any of my automatic vehicles) what issue should I be concerned with by never using it?
Our is it a case of you useing it after not using it for a long time, and hanging up?

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davester · May 24, 2019

Cables will rust/stick in place, same with the brake mechanism inside the rear hub. I also don't use the parking brake much, but I do periodically use it to stop the truck near my house, just to make sure they still work ok.

Lsgun1 · May 24, 2019

Parking brake isn't meant to physically slow the truck down. It is used for parking just like the name implies. Ever park on a hill and when you shift back to D you get the loud slam and its hard to move the shifter? That's cause you are resting on the parking pawl in the transmission because you didn't use the parking brake correctly. Proper use is get the truck where you want it, shift to N, apply parking brake and let off the foot brake. The parking brake will take the weight of the truck off the transmission, then shift to P. Anyways, good idea to use it on inclines whether they are large or small and it will insure that everything keeps moving.

batman900 · May 24, 2019

I've had the same issue since almost new 9 months ago. It's a binding like sound when in reverse only. Kind of a popping noise. Does it most of the time but not all the time. Just shrugged my shoulders at it.

Zip2014 · May 24, 2019

I've had the same issue since almost new 9 months ago. It's a binding like sound when in reverse only. Kind of a popping noise. Does it most of the time but not all the time. Just shrugged my shoulders at it.

That is it and only in morning. Can only hear if windows are down.

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