Question about 2007 Chevrolet Avalanche LTZ

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Brakes on my new truck

I have a 2007 avalanche bought new in Jan - 08. During my first oil change my mechanic noticed the break rotors were rusted with groves enbeded in them. I notified the dealer of the situation, I brought the truck to them to look into brakes. The dealer wanted to cut the rotor and not install new pads. If the rotors are junk then there is no doubt that the pads are junk as well. I refused to allow my new truck to have the rotors cut with only 3,000 miles on them. I contacted General Motors directly and they stated that this was a normal occurance. I believe the junk rotors with only 3,000 miles should have new rotors installed with new pads. What is your input on this situation.

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  • xsgt1 Aug 28, 2008

    Yes I do. The rotors on my 07 Avalanche LTZ wee turned @ or about 15000 miles. I still hear a lot of noise when I am braking. The service department @ the dealership said that everyone pertinent to the issue from the technicians, and their manager, to my salesman and to the sales manager and assorted other parties had driven the vehicle. All supposedly had stated that they had not heard anything unusual as far as noise went and that the braking seemed perfectly fine. GM's policy of anything over 7000 miles is NORMAL wear and tear is simply not acceptable as far as I am concerned. I traded a 03 Sierra Denali for this vehicle which had just over 100k with no brake problems whatsoever... GM should replace the JUNK rotors with rotors made of metal that will withstand the heat buildup, and other issues that are involved in the whole braking complaints. As a footnote they have stated that IF MY AVALANCHE should start to shimmy when braking before I reach 36000 miles, then the area service rep. has pre-authorized the replacement of my rotors... They (the rotors) in my way of thinking should already have been replaced. I am interested as to how many others out there have been through this scenario with GM... Thanks... David Payne ...



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I think you said it all i agree 100 percent hope it works out for you

Posted on May 24, 2008


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I have an 08 Avalanche. Having a severe grinding noise when coming to a stop in front. My brake pads are fairly new. Just started on Thursday. Sounds horrible now. What could it be.

Hi Benjamin:
I'd be getting the brakes checked (or actually check them myself).
That involves getting the vehicle jacked up, removing the wheels, and visually inspecting the brake pads and discs.
PLEASE! This is a safety issue and you NEED good brakes.

Don't delay/ Get them checked.
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Avalanche minimum rotor thickness

Rear Brakes JC5/JH5 Utility Only
Rotor Discard Thickness* .............................. 28.50 mm (1.122 inch)
Rotor Minimum Allowable Thickness After Refinish ....... 29.0 mm (1.142 inch)
Rotor Thickness-new .................................... 30.0 mm (1.181 inch)
Rotor Maximum Allowable Lateral Runout ................. 0.05 mm (0.002 inch)
Rotor Maximum Allowable Scoring ........................ 1.50 mm (0.059 inch)
Rotor Maximum Allowable Thickness Variation ........... 0.025 mm (0.001 inch)

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Rotor Discard Thickness * ............................. 27.50 mm (1.082 inch)
Rotor Minimum Allowable Thickness After Refinish ....... 28.0 mm (1.102 inch)
Rotor Thickness-new .................................... 29.0 mm (1.141 inch)
Rotor Maximum Allowable Lateral Runout ................. 0.05 mm (0.002 inch)
Rotor Maximum Allowable Scoring ........................ 1.50 mm (0.059 inch)
Rotor Maximum Allowable Thickness Variation ........... 0.025 mm (0.001 inch)

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When applying the brakes, the whole car shimmys. replaced rear rotors , turned front rotors , and replaced all the pads

I think you should get the Tierod ends checked. When you get a Front-end alignment, the mechanic will check them. Although you turned the front Rotors, when you start Braking the front tires can wander differently than when they freewheel.

Sometimes you can get a rust problem on the Rotors that were just made shiny. Moisture on the pads imprints a rust blotch on the Rotor and they grab at the rust until the rust wears down. Then they are ok.

When the rear Rotors were replaced check your bill and see if the Emergency brake shoes were changed. The E brakes should have been adjusted when the Rotors were replaced. The Shimmy you describe can also be the ABS working. The ABS is a pulsating Brake action.

Get your front-end checked first, then as the mechanic road tests it when the Alignment is complete, he can judge the brakes.,

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Not to question your ability, if you listen from the drivers seat while driving, just do yourself a favor, check the rear brakes, funny how sound travels and tricks the mind

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I would have someone check out the rotors for you.

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2 Answers

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