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SJP12

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SJP12 Enthusiast

SJP12

Posted
Posted

A few days ago I posted about a problem I was having on my 08 Silverado. I took it to my local dealer today (Glendora CHEVY, in So Cal) and mentioned the problem to them. They looked up the truck and found a bulletin on these trucks (bulletin 10-05-23-001) for brake squeak.

 

The service tech walks out tells me that he is going to check my pad's and rotors, he tells me that they were in the bulletin and he lets me stand in the service bay as he INSTALLS NEW ROTORS AND PADS.....all the time picking he's brain about my truck. From the time I pulled into service till the time i left was less than 1 hr.

 

Just FYI, have your brakes checked.

MS3DALE Senior Enthusiast

MS3DALE

Posted
Posted

I'm going to go ahead and post the TSB you referenced in case other guys are having the same issue.

 

 

#10-05-23-001: Brake Induced Pulsation/Vibration in Steering Wheel, Rumble Noise from Underbody During Downhill Descent (Verify Condition and Replace Front Brake Pads) - (Mar 23, 2010)

 

 

Subject: Brake Induced Pulsation/Vibration in Steering Wheel, Rumble Noise from Underbody During Downhill Descent (Verify Condition and Replace Front Brake Pads)

 

 

Models: 2008 Chevrolet Silverado Light Duty (LD)

 

2008 GMC Sierra Light Duty (LD)

 

2nd-Design Only - w/ Pad Spreading Spring Clips (Refer to PIT4611 for Design Identification)

 

Equipped with Disc/Drum Brakes (RPO JF3) and Stabilitrak (RPO JL4)

 

2009-2010 Chevrolet Silverado Light Duty (LD)

 

2009-2010 GMC Sierra Light Duty (LD)

 

Equipped with Disc/Drum Brakes (RPO JF3) and Stabilitrak (RPO JL4) or (RPO JF7) and Stabilitrak (RPO JL4)

 

 

Condition

Some customers may comment on a pulsation or vibration mostly concentrated in the steering wheel during downhill descent as specifically described. This condition will most often begin as an increasing rumbling noise coming from the underbody or the front of the vehicle. This condition is exhibited mostly in mountainous regions.

 

Note: Use care to ensure the following diagnosis and repair are only attempted if the conditions and concern match those listed, and if the concern can be duplicated under the same conditions.

 

This condition occurs ONLY under the following conditions:

• When the vehicle is driven as follows:

 

• On a downhill descent on fairly steep grade (roughly 5% or greater)

 

• On larger hills (roughly 1.5 km [1 mi] road length or greater), without sharp turns

 

• At speed limits above 64 km/h (40 mph)

 

• Using the brakes just enough to maintain the speed limit moving downhill.

 

• Typically, a rumbling noise will be heard first, building in intensity, followed by increasing pulsation, or vibration, felt in the steering wheel, then typically felt in the floor panel.

 

• The condition will be eliminated once the vehicle is driven on relatively flat ground, typically for 1.5-3 km (1-2 mi).

 

Cause:

This condition may be caused by interaction between the front brake lining material and the front brake rotors.

 

Correction:

Important: Do not attempt any repairs on the vehicle until you verify the specific condition is present by following the steps below:

 

Warm up the vehicle by driving approximately 8 km (5 mi).

Drive the vehicle in the lane closest to the side of the fairly steep grade (roughly 5 percent or greater), larger hill (roughly 1.5 km [1 mi] road length or greater), without sharp turns, and with a speed limit of 64 km/h (40 mph) or greater, with the side windows down.

While in Drive, descending downhill, apply the brakes naturally, only as needed, to maintain the speed limit.

Observe for noise, followed by pulsation/vibration. Observe where the noise, pulsation and/or vibration are most noticeable.

Drive the vehicle on relatively flat ground for 1.5-3 km (1-2 mi) to verify that the condition goes away completely.

Note: If the Front Pad Kit listed is used to correct any condition other than the condition described in this bulletin, the vehicle could experience higher mileage corrosion-induced brake pulsation.

 

If the condition described has NOT been verified, or if the condition observed is NOT most noticeable through the steering wheel, the observed condition may have a different cause, such as a tire/wheel or rear brake issue, etc. Refer to SI for any further related diagnostics.

 

If the condition described has been verified, and if the condition is most noticeable through the steering wheel, and if the condition was eliminated after driving the vehicle on relatively flat ground, typically for 1.5-3 km (1-2 mi), perform the following inspections and repairs.

 

Important:

 

• It is critical to use the proper OEM brake rotors. Use of Non-OEM rotors may prevent the condition from being corrected long term.

 

• If Non-OEM rotors are identified, these rotors are NOT covered under the GM New Vehicle Limited Warranty.

 

 

Inspect the front brake rotors to ensure that they are OEM rotors.

• Remove the brake rotor from the vehicle.

• Inspect the back side of the rotor for the Bosch Logo. If NO logo is present, replace with OEM GM rotors, P/N 25819670.

 

Inspect the front brake rotors for Assembled Lateral Runout (LRO) and thickness variation. Follow SI procedures.

Inspect the front brake rotors for minimum thickness. Follow SI procedures.

If the rotors are within specifications, do NOT refinish or replace the rotors.

If the rotors are out of specifications, refinish the rotors on a qualified lathe, or replace the rotors as appropriate. Follow SI procedures.

Note: To prevent a noise concern, follow the brake pad insulator preparation and seating instructions as referenced in Front Brake Pad Replacement (1500) in SI.

 

Install the specified front pad kit, GM P/N 25910432. Follow SI procedures.

Ensure that the condition has been eliminated under the same conditions.

 

Parts Information,

Part Number & Description:

 

25910432 - Pad Kit-Frt Disc Brk

 

25819670 - Rotor-Frt Brk

huero626 Senior Enthusiast

huero626

Posted
Posted

Cool, are your new brakes doing good? I've never gone to Glendora Chevrolet, I bought my truck at Puente Hills Chevrolet and I take to get serviced there.

Daryl LBZ Senior Enthusiast

Daryl LBZ

Posted
Posted

This is EXACTLY what my brakes do! As far as getting it fixed what do I have to do? Print this off and take it to the dealer?

SJP12 Enthusiast

SJP12

Posted
  • Author
Posted

I went to the dealer because my brakes had been making noise and I just happened to be in the area. THEY TOLD ME about the bulletin and I had new brakes an 1hr later.

jdg2 Enthusiast

jdg2

Posted
Posted

I was in the mountains this weekend and noticed the exact same behavior from my brakes. My brakes have been doing this the last couple trips into the mountains. I was actually going to post about it this AM (thanks for the info). Guess it is time to make my first trip to the dealer for a brake check. Can't complain I guess, first problem at 24,000 miles.

rc51matt Enthusiast

rc51matt

Posted
Posted

mine shake the wheel when i'm trying to slow down gradually and they resurfaced the rotors once and no new pads it started again another 15,000 miles later. when i took it back they said it needed the rotors turned down again at my cost. unfortuanatly my truck is a 2007 so i don't think it will be covered under this. i figure i'll buy new non-gm rotors and pads when i get it back unless i can get the insurance company to pay for them

tanked_darren Senior Enthusiast

tanked_darren

Posted
Posted

My brake pads wore out at 65000kms 5000 out of warrenty my passenger side rotor, warped, probably way before, you know what? GM designs these warranties to get you just out of them and you might get lucky, or if you abuse the hell out of them you might get a freebie, long story short, eat the shit, and just buy a higher quality rotor pad and caliper when it comes time, Ford Dodge and GM they all have their shit qualities deal with it? LOL

 

Minor brake squeal is cured by cleaning and chamfering your wear ends on the pads, EACH end of were the pad contacts.

jro909 Senior Enthusiast

jro909

Posted
Posted
My brake pads wore out at 65000kms 5000 out of warrenty my passenger side rotor, warped, probably way before, you know what? GM designs these warranties to get you just out of them and you might get lucky, or if you abuse the hell out of them you might get a freebie, long story short, eat the shit, and just buy a higher quality rotor pad and caliper when it comes time, Ford Dodge and GM they all have their shit qualities deal with it? LOL

 

 

lol true that, i always get a nice tickle when people with warrantys piss and moan at gm...shed a tear for us guys that had the old shitty warranty that went away way before your 100k warranty

GPGuy Senior Enthusiast

GPGuy

Posted
Posted

Mine don't pulsate or vibrate but they give me this nice little annoying squeak just before I stop. Very annoying. They did a recall for this a few months back but it just came back again anyhow. :noway: I think I'll have to take mine in again.

Daryl LBZ Senior Enthusiast

Daryl LBZ

Posted
Posted

I called my dealer today and they are going to fix mine next Thursday. He said GM has a new set of pads for this and they are going to install them. They are also gonna check the rotors to see if they are ok. Thanks for posting about this guys!

tanked_darren Senior Enthusiast

tanked_darren

Posted
Posted
My brake pads wore out at 65000kms 5000 out of warrenty my passenger side rotor, warped, probably way before, you know what? GM designs these warranties to get you just out of them and you might get lucky, or if you abuse the hell out of them you might get a freebie, long story short, eat the shit, and just buy a higher quality rotor pad and caliper when it comes time, Ford Dodge and GM they all have their shit qualities deal with it? LOL

 

 

lol true that, i always get a nice tickle when people with warrantys piss and moan at gm...shed a tear for us guys that had the old shitty warranty that went away way before your 100k warranty

 

 

Materials of pads can dictate the type/serverity of noises from braking most are just noises!

 

I know its like people expect a lifetime quality when they buy a vehicle, those recommended intervals for getting your brakes serviced? Try cleaning them instead on your own and the damn squeal won't be so bad! Or be a fool and pay the $100 or so...

 

Hell... theres alot of money to be made off of people who think they're vehicles are junk off of just noise!

jro909 Senior Enthusiast

jro909

Posted
Posted
My brake pads wore out at 65000kms 5000 out of warrenty my passenger side rotor, warped, probably way before, you know what? GM designs these warranties to get you just out of them and you might get lucky, or if you abuse the hell out of them you might get a freebie, long story short, eat the shit, and just buy a higher quality rotor pad and caliper when it comes time, Ford Dodge and GM they all have their shit qualities deal with it? LOL

 

 

lol true that, i always get a nice tickle when people with warrantys piss and moan at gm...shed a tear for us guys that had the old shitty warranty that went away way before your 100k warranty

 

 

Materials of pads can dictate the type/serverity of noises from braking most are just noises!

 

I know its like people expect a lifetime quality when they buy a vehicle, those recommended intervals for getting your brakes serviced? Try cleaning them instead on your own and the damn squeal won't be so bad! Or be a fool and pay the $100 or so...

 

Hell... theres alot of money to be made off of people who think they're vehicles are junk off of just noise!

 

 

 

right, something so small like brake noise is no reason to climb up on the soapbox yelling at GM, let alone the dealer...nothing on the planet is perfect besides telephone poles and budweiser, so please remeber your truck was built by humans..the design was made by humans...the parts were made and or supervised by humans....whats this all mean? THERES ROOM FOR ERROR....i would love to have a warranty,hell i would be grateful and if i had a problem i would be a man and go with the flow and allow a great company to remedy the problem without dropping bombs, unless your brakes just flat out don't work or your truck sounds like silverware in a blender then just take a deep breath,relax and contact your dealer and explain your concern without going into meltdown...

Daryl LBZ Senior Enthusiast

Daryl LBZ

Posted
Posted
My brake pads wore out at 65000kms 5000 out of warrenty my passenger side rotor, warped, probably way before, you know what? GM designs these warranties to get you just out of them and you might get lucky, or if you abuse the hell out of them you might get a freebie, long story short, eat the shit, and just buy a higher quality rotor pad and caliper when it comes time, Ford Dodge and GM they all have their shit qualities deal with it? LOL

 

 

lol true that, i always get a nice tickle when people with warrantys piss and moan at gm...shed a tear for us guys that had the old shitty warranty that went away way before your 100k warranty

 

 

Materials of pads can dictate the type/serverity of noises from braking most are just noises!

 

I know its like people expect a lifetime quality when they buy a vehicle, those recommended intervals for getting your brakes serviced? Try cleaning them instead on your own and the damn squeal won't be so bad! Or be a fool and pay the $100 or so...

 

Hell... theres alot of money to be made off of people who think they're vehicles are junk off of just noise!

 

 

 

right, something so small like brake noise is no reason to climb up on the soapbox yelling at GM, let alone the dealer...nothing on the planet is perfect besides telephone poles and budweiser, so please remeber your truck was built by humans..the design was made by humans...the parts were made and or supervised by humans....whats this all mean? THERES ROOM FOR ERROR....i would love to have a warranty,hell i would be grateful and if i had a problem i would be a man and go with the flow and allow a great company to remedy the problem without dropping bombs, unless your brakes just flat out don't work or your truck sounds like silverware in a blender then just take a deep breath,relax and contact your dealer and explain your concern without going into meltdown...

 

 

 

 

 

 

 

Yes brakes don't last forever and sometimes they will squeal, but obviously GM screwed up on this one because they put out a Service Bulletin on it. My truck only has about 14,000 miles of easy braking on it and the pads are over half way worn out and the truck shutters like hell when you use the brakes. I was just gonna replace them soon anyhow, but since this Bulletin came out I'll let the dealer worry about since the trucks under warranty. :cool:

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