Cadillac DTS Forum - 2006 through 2012 Discussion, Pulsing brakes with a twist.. in Past Cadillac Vehicle Discussion; I have noticed that the brakes on my 2008 DTS pulse noticeably (not drastically) when stopping from city speeds. the ...
I have noticed that the brakes on my 2008 DTS pulse noticeably (not drastically) when stopping from city speeds. the feeling is exactly like that of a warped rotor.
The twist and the funny part is that after a stretch on the highway with speeds over 65mph the feeling goes away for a while and the brakes are smooth, but then after an hour or so of driving in town with stop and go driving under 45mph the pulsing feeling returns.
The good news is that I have the best dealer extended warranty program at a great dealer and I have to schedule the 75K mile checkup in the near future.
Being the hack shade tree mechanic that I am this sounds more like a wheel bearing or half-shaft/CV issue to me than an actual warped disk. What say you?
Is there anything I can do to further narrow down the symptoms so when I make the appointment I can make the mechanic's job easier or should I just tell him that I "sometimes" feel a pulsing in the brakes and it is getting more noticeable and let him figure it out without my amateur assistance?
The chance that it is an actual warped rotor is somewhere between slim and none and slim just left town.
What you are experiencing is brake pad build up on the rotors.
I had the exact same thing.
If you replace the pads with the new reformulated pads... it will all go away and not come back.
Or at least mine did as did a few more on the forum.
There is actually a TSB on that... but I do not know the number offhand.
Here is the TSB for the brakes...
#07-05-23-002A: Brake Noise/Pulsation When Traveling Down Steep Grades (Replace Front Brake Pads) - (Jun 11, 2009)
Subject: Brake Noise/Pulsation When Traveling Down Steep Grades (Replace Front Brake Pads)
Models: 2006-2008 Buick Lucerne
2006-2008 Cadillac DTS
This bulletin is being revised to add the 2008 model year. Please discard Corporate Bulletin Number 07-05-23-002 (05 – Brakes).
Some customers may comment on brake noise/pulsation when traveling down steep grades. This condition affects vehicles driven primarily in mountainous terrain.
The brake pads may become rough due to heat build-up during brake application.
Replace the brake pads with new brake pads, P/N 25837407, that are available to minimize this condition