CorvettePartsBob

This is a new bulletin just released for this problem. GM has plenty of the rear pads in stock, but very limited supply of the front pads inbound from the mfg. GM Parts was not aware of this bulletin and I passed it on to a supervisor and advised them they better get a bunch of fronts on hand asap. If you are having this problem notify your dealer and give them this bulletin # so they can order you new brakes. Remember this is not a recall, but just the information for a dealer to do a repair under factory warranty.

Bob

Document ID# 1682443


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Brake Squeal on Vehicles Equipped with Z51 Package - keywords disc front groan noise pad rear squeak #PIC3320A - (Jul 8, 2005)
Brake Squeal On Vehicles Equipped With Z51 Package
2005 Chevrolet Corvette With (RPO Z51)

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
Some customers may comment that when they apply the brakes, the vehicle exhibits a squeal noise. This squeal noise is heard coming from the front or rear of the vehicle. Vehicles produced with the Z51 sport package are equipped with larger rotors and harder pads.

Recommendation/Instructions:
Replace both the front and rear brake pads with the part numbers listed below. Both front and rear pads need to be replaced due to the difference in composition of the brake lining material. The existing rotors should be used and it is not necessary to machine the rotors.

Part Number
Description

89060211
Front Brake Pads

88964095
Rear Brake Pads


Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.



GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
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© Copyright General Motors Corporation. All Rights Reserved.


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Document ID# 1682443

ALFONSE

Mine don't squeal but GREAT INFORMATION, THANKS!
AL

Datawiz

Awesome info! Thanks!

pasquale

Thanks...........this is perfect!

MichaelB

Bob comes through again!!

barney

Thanks for the information. I got mine done a week and half a go. It sure is nice to stop at a light and not have everyone looking at you because your brakes are noisey. Your info should be helpful to a lot of people with Z51.

ASZ2222

Thanks!

S2K

Why don't they have this for non-Z51's which also squeak?

Vette junkie

My Z51 just turned over 3,000 mi. and has not squeeked once ever. Serial #20796. Is it possible that a running change was made on the brake pads to the new parts and if so is there any info on which serial #s the change applies to?

Greystone

My Z51 breaks actually didn't start squealing till I got past 4,000 miles.....

FastMover

My Z51 C6 was built in Jan 2005 and NEVER made a sound until last week at 7705 miles, now it always make noise.... But thanks to Bob's info my dealer has new pads on order

spydey95

Great information. I had this squeal starting around 3500 miles, and now I have 8k miles (squeal still there). I guess it was a minor annoyance, but hey, if they're going to do a service bulletin under warranty....so I gave my dealer a call. They said they'll have the brake pads ordered. By the way, I also came in for the Service Fuel System light fix about two months ago. That was a two day job. Let's hope brake pads won't take that long.

2005ArcticWhite

Good info

C6-Phil

My 2005 Z51 has just over 1000 miles and the brake pads seem to be dragging. This only happens when I first start to back in to the garage. Anyone experience this?

SunsetC6

Yea, mine does it as you release the pedal. Wondering if the new pads help. I'm new here this week but have had car since Feb. Found out a lot of really helpful info. Lot of nice people here. Think I'm gonna stay awhile.

mnmvette

Have you noticed any difference in brake dust?

C6-Phil

Yea, I like this site too. I have had my Vet for a month now, and the noise is not to bad. I think I will wait on the new pads until they start to squeak, looks like that happens to all Z51 owners eventually.

natejohn

I wonder (though fear ino the answer) if this "fix" is appilicable to cars that didn't come with the Z51 option but have sinced switched to Z51 brakes?

NavyC5

Awesome. Mine are making noise. I wonder if the dealer will order me the new pads but let me put them on. I don't trust my dealer at all.

LKicklight

Okay Boys and Girls, here is the scoop..yes this bulletin does address the squeal problem we so often hear, but even though you replace the exsiting pads with the replacements recommended, beware, when they wet or high humidity, more than likely they will squeal and groan again. Also, braking performance is also comprimised, how much?????? These particular replacement pads or not true ceramics, which if they were 100% ceramic, there go your pads and rotors. Your brake dust will be less also using these replacement pads. No more than I drive my C6, I can live with a little less brake dust, less squealing and a little less performance, all three of these were really bugging me. Dirve the car ten miles and the darn wheels have to be washed off, go over 50 mph and you sound like a tanker truck pulling into a parking lot.
Thanks:
KICKBACK