Brake Pad Life

[ddevos]

From what I understand, the same sensors are used in the Cadillac CT6. The brake pads have a wire in the pad, and current flows through the wire. The vehicle measures resistance. As the pads, and thereby the wire, wears down, the resistance increases as it is the same amount of current flowing through a smaller diameter wire. This, as well as many other factors im sure, are calculated into the estimate for pad life remaining.

 

I have a theory with the eboost system that provides brake assistance, what if that system is wrong, and is providing more brake assist than neccessary thereby wearing the pads out sooner.... 

 

Simplest test, check actual pad thickness. Compare that to the reported pad life, if true - suspect eboost software applying too much pressure. If pad life greater than reported, suspect software giving false readings...

[z1boss]

Hope this helps everyone.  Just checked mine now when I rotated my tires.  18k miles and my fronts say 41% left for the brake pads.  Not true at all.  They are almost brand new, front and back.  I wouldn't worry at all about what the sensors say.

 

 

[lebag335]

My dealer did multiple updates at my first oil change.  They did ECM, TCM, BCM and another brake related one to address the rapid decline with the brake wear indicator.  Also got a radio update while there too plus first oil change.  All at no cost to me!  My brake wear indicator now shows 100% front and rears.  Hopefully this issue is fixed for me. 

[ShamrockShooter]

My dealer did multiple updates at my first oil change.  They did ECM, TCM, BCM and another brake related one to address the rapid decline with the brake wear indicator.  Also got a radio update while there too plus first oil change.  All at no cost to me!  My brake wear indicator now shows 100% front and rears.  Hopefully this issue is fixed for me. 

Would you mind sharing your work order from dealer that lists what update they did? I'm going in Monday and want to mention it.

Are you sure they didn't just reset it 100 manually and tell you it's fixed?

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[lebag335]

Well, no.  I'm hoping they did all of what I mentioned.  For sure, time will tell!!

[Texanfisherman]

Had some other things to do at the dealer so I mentioned this since I was showing 80% life at 2K miles. They inspected the pads and found them at slightly less than 100%. They reset the indicator and sent me on my way. As such, I removed the brake wear indicator from the displayed items and am blissfully unaware of its reading.

[Schmoe]

Here’s mine. 70% highway driving. At dealership now for oil change, etc. will update when finished.

[scdaren]

On 6/6/2019 at 9:05 AM, ddevos said:

From what I understand, the same sensors are used in the Cadillac CT6. The brake pads have a wire in the pad, and current flows through the wire. The vehicle measures resistance. As the pads, and thereby the wire, wears down, the resistance increases as it is the same amount of current flowing through a smaller diameter wire. This, as well as many other factors im sure, are calculated into the estimate for pad life remaining.

 

I need this overcomplicated feature in my pickup truck like I need a horn growing out of my head.  What happens when you need to replace the pads, are they now like quadruple the price to get that silly wire?

 

Would rather they have left this alone, and not tried to save a few dollars by removing the glasses compartment from the overhead, and the adjustable seatbelt shoulder mount, both of which have been standard on every new car I've bought since the mid-90s.

[ddevos]

6 hours ago, Schmoe said:

Here’s mine. 70% highway driving. At dealership now for oil change, etc. will update when finished.

Any update?

[Schmoe]

23 minutes ago, ddevos said:

Any update?

“Brake pad life shows minimal wear. But I’ll contact you in a week and a half so that we can try to give you a loaner to investigate the problem. We will need your truck for a few days”. ?

[ddevos]

13 minutes ago, Schmoe said:

“Brake pad life shows minimal wear. But I’ll contact you in a week and a half so that we can try to give you a loaner to investigate the problem. We will need your truck for a few days”. ?

Go figure. 

[Booger T]

Mines also showing lower than would be expected. I did have pads changed on left rear for another warranty related issue 4-5 K ago.

[mfbearded]

i believe he said hes gone thru 20%....which seems reasonable for 13000 miles. im in the same ballpark with 10000 miles. without factoring in driving habits and paths traveled it seems normal. I have larger wheels, heavier tires, i tow occasionally. I look at the information as a helpful guideline rather than something i worry about. brake pads like tires are going to need to be changed eventually. beats the old days with my nissan armada when i was having pads and rotors changed every 15,000 miles cause nissan didnt put adequate size brakes for the size of the truck.

[PetePaul]

I've had the same issue, and was told that on June 28th, GM released a document to dealers titled "PIT5695 Brake Pad Life % Calculates Down too Quickly". Seems we all of us having this issue are not crazy or driving our trucks wrong:-) I found with the dealer for 3 days on this one, and they released this on the day I went to pick up my truck from the service dept. Still no update, but they GM is aware of this and apparently has a software fix. They told me that the update would need to be performed at the dealer...

https://static.nhtsa.gov/odi/tsbs/2019/MC-10162168-9999.pdf

[RyanbabZ71]

Good because at this rate I will be at 0% around 8K miles [emoji23]


Ryan B.