Rear end brake/suspension creaking sound

[Travis1024]

Hey All - For some time now, I've had a braking noise coming from the rear of my 2016 Silverado. Tried to pinpoint, and it sounds like it's coming from the axle/leaf spring area, but can't tell if it's the perch, the actual leaf springs, or parking brake cable tensioning something involved on the rear axle. 

 

This noise is NOT a squeak/squeal like you would hear driving on worn pads, etc -  its more a creaking sound similar to that of stepping on a loose floor board. 

 

I notice it at lower speeds, however it also happens when I suppress the break while the truck is in park. The sound is consistent through the full brake suppression to the floor.

 

Anyone seen this issue? Any ideas?

 

(I'll see if I can get a video of the noise later today, however it might be tough to hear since I have exhaust)

 

 

 

[btj_z71]

2 hours ago, Travis1024 said:

Hey All - For some time now, I've had a braking noise coming from the rear of my 2016 Silverado. Tried to pinpoint, and it sounds like it's coming from the axle/leaf spring area, but can't tell if it's the perch, the actual leaf springs, or parking brake cable tensioning something involved on the rear axle. 

 

This noise is NOT a squeak/squeal like you would hear driving on worn pads, etc -  its more a creaking sound similar to that of stepping on a loose floor board. 

 

I notice it at lower speeds, however it also happens when I suppress the break while the truck is in park. The sound is consistent through the full brake suppression to the floor.

 

Anyone seen this issue? Any ideas?

 

(I'll see if I can get a video of the noise later today, however it might be tough to hear since I have exhaust)

 

 

 

I had something similar, or at least sounds similar, and I used silicone lubricant on all the non-metal parts.  Took care of the problem for me!

[tlaw91]

Too easy


#18-NA-183 GM bulletin

You need rear leaf spring inserts replaced, and rear axle U bolts properly torqued. They’re always loose anyways. AND DONT LUBE THE NEW LEAF SPRING INSERTS AFTERWARDS DAMMIT

Other techs have done that and it comes right back and they’re all [emoji2369]

Not a bad job after you’ve done a few.

You’re welcome

-Friendly neighborhood GM tech


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[Travis1024]

On 2/2/2020 at 8:11 AM, tlaw91 said:

Too easy


#18-NA-183 GM bulletin

You need rear leaf spring inserts replaced, and rear axle U bolts properly torqued. They’re always loose anyways. AND DONT LUBE THE NEW LEAF SPRING INSERTS AFTERWARDS DAMMIT

Other techs have done that and it comes right back and they’re all

Not a bad job after you’ve done a few.

You’re welcome

-Friendly neighborhood GM tech


Sent from my iPhone using Tapatalk

I appreciate the info! I googled and looked on Amazon and Dorman's site, but can't seem to have anything that will fit my truck.

 

Do you happen to know the part number? order directly from GM? Assuming I need a total of (2) inserts?

 

 

[tlaw91]

You need 4 inserts

P/N 84730971

You should pm me if you can’t find the bulletin online because it involves a hack saw, rtv, a hammer and a pry bar


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[Travis1024]

24 minutes ago, tlaw91 said:

You need 4 inserts

P/N 84730971

You should pm me if you can’t find the bulletin online because it involves a hack saw, rtv, a hammer and a pry bar


Sent from my iPhone using Tapatalk

Awesome, thank you. I'm going to order the parts and have my preferred shop that I take all my cars to do it. Hoping that it's covered under my B2B warranty, especially since there is a service bulletin about it. I'll pass this information on to my shop and I'll shoot you a PM if they think there will be any issues.

 

Good stuff, and appreciated!!

[tlaw91]

If you give me ur vin I could tell you if it’s covered or not


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[Travis1024]

On 2/3/2020 at 9:41 AM, Travis1024 said:

I appreciate the info! I googled and looked on Amazon and Dorman's site, but can't seem to have anything that will fit my truck.

 

Do you happen to know the part number? order directly from GM? Assuming I need a total of (2) inserts?

 

 

Sorry, don’t know how I missed this response. I’ll grab my vin when I get home today. I’d like to bring this thread back, as I finally got around to ordering the inserts yesterday.  
 

My question for you is (excuse my lack of knowledge here) if it’s the leaf spring inserts, why does the creaking sound persist when I suppress the brake, even when in park and on a flat surface like my driveway?