Rear brake issue on brand new 2008-2010 cobalt ss the rear brake pads are overly hard to the rotor, causing heavy scouring and warping this is a known issue in the community for this vehicle and many gm dealers are not repairing the item under warranty, this item needs a recall.
2008 Chevrolet Cobalt SS brakes complaints
Page 3 of 4: complaints 41 to 70 of 73, newest first, as owners wrote them.
1. Before purchasing this vehicle new in 2008, I was made aware of an issue with the rear brake wearing abnormally. I had made at least two inquiries to the service department at the dealership about the possibility of a tsb (technical service bulletin) being released on the problem. At the time there had not been, but I had neither experienced the problem up until then. 2. The failure occurs with the parking brake mechanism. The parking brake functions by engaging the inside brake pad on the rear brakes. There is a return spring that is suppose to disengage the brake pad when the parking brake is released. This spring is failing to disengage the inside pad causing the pad to wear abnormally. The result is that the inside pad will wear thin very quickly and eventually begin to damage the brake rotor. 3. I have returned the vehicle to the dealership for service and I was deferred to gm customer service. They informed me that they do not believe there to be a defect and will not perform the replacement work under their warranty. To solve the problem, I will be replacing all of the rear brake pads and rotors and installing a higher tension spring on the parking brake return.
2008 chevy cobalt ss under normal driving and braking conditions the rear disk brakes wear unevenly and fail prematurely. Incident 1: 0% pad material on inner linings on both left and right rear wheels with >80% material outboard pads. Failure occurred with about 17k miles. On inspection it was observed that gm had failed to apply lutricant to the guide pins of calipers. Replacement of rotors and pads was required. Incident 2: same failure as incident 1. 0% pad material on inner linings of both left and right rear wheels with >80% material on outboard pads. Failure occurred within 20k miles. Replacement of rotors and pads was again required.
I had only 12000 miles on my new cobalt turbo 08 model and had to pay out of pocket to have the rear pads and rotors replaced.
Rear brakes are wearing prematurely. Grooves are forming in rotors from faulty equipment. Car is at 23,000 miles.
At 6000 miles, my rear brakes are completely worn down, my rotors are scored, and one gm dealer said they would warranty my rotors if I purchased new pads for over $100, and another dealer said that the wear was "normal" for my car. This obviously is a manufacturer defect, and I am not very happy. The dealer said I have over 75% life left on the pads through his gauge system, and yet it makes horrible screeching noises. The rotors are scored very badly.
2008 chevrolet cobalt ss rear brakes faulty. Rear pads are gouging in to rotors very badly at this point, 11,000 miles. I driver conservatively. This gouging of rotors actually became noticeable at only 3500 miles. I have owned the car since new. I recommend gm puts recall out on rear brakes for this car to replace rotors and pads free of charge.
Rear brakes started to be noisy at about 2000km, huge grooves on the rotors. I downshift/rev match all my gears,I don't abuse my car, I don't go in dirt road. Brakes are supposed to last 60k minimum. Dealers won`t put the job under warranty.
2008 chevrolet cobalt ss. Rear brake rotors badly grooved. Inner brake pad worn completely out. Outer pad worn to less than 50%. Front rotors have small grooves and have just under 40% of pad life left. Gm dealer would not fix under warranty but acknowledged that they didn't know why rear brakes are wearing before fronts. I have owned car since it was new. No racing just daily commuting to and from work (40miles one-way). Installed oem pads at 15000. Have seen problem progressively get worse since about 7000 miles. Current mileage approx. 32000,pads worn out in same manner as stated above and rotors are severely grooved, worn past safe refinish limits. Front pads are in ok shape and small grooves in rotors. 95% of driving is done on highway.
Scoring of inner rear rotor. Noticed after 1100mi. Due to some part of caliper rubbing on rotor.
Since I purchased my 08 cobalt ss, I noticed the brakes made noises and the rear brakes wore funny. Brought it to the dealer where they deemed this "normal for these brake pads." at 19,000 miles I already needed new rear brakes as the dealer said they were "grinding against the metal" and my rotors needed to be resurfaced. Something has to be done about this as putting a new pad on does not fix the problem and I will only need new pads and rotors in another 15,000 miles or so.
2008 cobalt ss. Scoring on both sides of front and rear rotors. Noise from rear brakes. First noticed at 10,000 miles (car now has 12000). Dealer would not fix under warranty because in their view, scored rotors are"cosmetic".
The rear rotors on my 2008 chevrolet cobalt ss seem to be wearing very fast. My car has 19,000 miles on it, and it is about a year and a half old. I took delivery on may 31st 2008. I noticed the rotors starting to wear this past spring.
Rear rotors beginning to show grooves in them with only 14k miles on car.
At approximately 18,000 miles, my 2008 chevrolet cobalt ss had a grinding noise coming from the rear brakes. This noise was worse when I used the brakes. I drove the vehicle another 30 miles to my destination. Upon arrival, I noticed that I had lost about 50% of my braking power and that the grinding noise was much worse than when I first noticed it, 30 miles earlier. Of course, I replaced the brake pads, knowing that the noise they were making was caused by the pads wearing out and the metal grinding against the rotor. To my surprise, only the inside brake pads were worn to the metal, and the outer brake pads had just over 1/4 of an inch of pad left. I immediately called my local gm dealer and I was informed that there is a tsb (technical service bulletin) posted in their computer systems that says the problem is caused by the driver and that gm dealers are not to cover the rear brake problem. I know that this problem will occur in another 20,000 miles because there is something wrong with the calipers or entire brake system. The inside pads should not wear out faster than the front. They should also wear evenly. Another concern I have is the loss of braking power in only 30 miles from the earliest sign of a brake problem. I don't like the fact that the rear brakes, specifically the inside brake pads, are doing approximately 50% of the braking. Most of the braking should be done by the front brakes, which have well of 1/4 of an inch of brake pad left on the inside and outside pads.
The rear brakes are toast on my new car. I have around 10,000 miles and will soon have to pay for new rotors and pads. Hopefully I can afford to do this before my calipers go out too. 2008 cobalt ss - premature ware - never driving hard - daily driver -
Rear brakes: inner pads metal on metal, outer pads still plenty of life left at 17,500 miles. Reported brake squeal/grinding by 4,000 miles, had parking brake re-adjusted at that time.
Rear driver side rotor grinding bad about 1 inch from the top on the inside. Passenger side rotor groving all of the inside. Car has 14,000 miles on it.
Rear brakes on 2008 chevy cobalt ss, wear rapidly causing destruction of the rotors and excessive stress on the front brakes. Replaced under warranty the first time at ~12,000 miles. Rear pads completely shot again at ~22,000 miles. This time, the dealership wouldn't cover it. The extended abuse to the rear brake system cause abnormal noise from the rear during low speeds.
The rear brakes are wearing prematurely. The pads have damaged(create deep ruts in) the rotors on the surface. The dealer told me it was normal and did nothing. This wear started within 5k miles. The car has a manual transmission and I hardly use the brakes.
Rear brakes are gouging and wearing at an alarming rate. At 15k miles I am about due to replace the pads and rotors in fear that they will fail. I had them inspected at 1900 miles when the problem first occurred, dealer stated it was normal wear. Dealer denied me warranty coverage due to only a 12k warranty on the brakes.
Rear brake pads on 2008 cobalt ss have grooved in the rear brake rotors. Driver's side rear rotor is much more grooved in than passenger's, leading to my belief that brake pads are wearing unevenly in addition to scoring rotors. Problem has occurred with many other owners, see cobaltss.net/forums. When vehicle was brought in to gm dealer, service manager informed me that wearing was "natural", and that I should bring the vehicle back in at 15000 miles.
2008 cobalt ss rear brakes are wearing prematurely and rotors badly grooved. Rotors were turned at approx 7000 miles. Now at 23000 miles and inner brake pads are down to metal and rotors are once again badly grooved.
2008 chevrolet cobalt ss. Rear brake rotors badly grooved. Inner brake pad worn completely out. Outer pad worn to 50%. Front rotors are smooth and 80% of pad life left.gm dealer would not fix under warranty but acknowledged that they didn't know why rear brakes are wearing before fronts. I have owned car since it was new. No racing just daily commuting. Had rotors turned and installed oem pads at 16500. Have seen problem progressively get worse since about 4000 miles. Current mileage 35000,pads worn out in same manner as stated above and rotors are severely grooved again,worn past safe refinish limits. Front pads are still in very good shape and no grooves in rotors. Car is driven mostly on interstate.
Severe groove wear on rear rotors of my 2008 chevrolet cobalt ss.
The rear brake rotors on both sides are severely grooved on the inner and outer surfaces. The inner brake pads on both sides are worn noticeably more than the outer pads. The brakes make a grinding noise. The parking brake doesn't hold the car in place. This is at 4k miles.
Rear brake noise and grinding and rotors scored and grooved after 6k miles. The rear brake noise was present even when I was driving and worse when braking. The car went to two dealerships and was told this advanced and premature wear was normal.
After driving 18k miles of highway in less than a year my rear brake pads were worn to the backing plate. On top of that my brake rotor were badly grooved and needed to be machined. This vehicle has never been to a track, minimal city driving, never excessive speeds, and minimal heavy braking.
Rear brakes wear very rapidly. The rear brake pads were completely gone within 14k miles, rear rotors scored so heavily they needed to be replaced. 10k miles later the replacement brakes are almost gone. Not covered under warranty. The front brakes have been fine this entire time - still plenty of life left.
Rear rotors are severely grooved on both the inside and outside. The car has approximately 20k miles.
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