2001 Silverado Brake Pedal

[Wayne60]

Originally Posted by j cAT

It could be other componets also , but this is the most common answer..

in 1992 GM used a better higher quality caliper ...the 2001 is suseptible to corrosive road chemicals.

Very good info. Now the about 01 caliper what are the symptons of corrosion, some kind of binding ?

Thanks.

[j cAT]

Originally Posted by Wayne60

Very good info. Now the about 01 caliper what are the symptons of corrosion, some kind of binding ?

Thanks.

you have a very poor /cheap/low quality pin,caliper weather dust boots...and the tolerances are very variable...this means that the pads/caliper pins may fit very tight and start binding on install....

If you live in a wet/snow climate you will find the pins rust to siezure in a very short time..


my 1996 and the other older vehicles never had this occur...no wonder GM is not long for this world...

[Wayne60]

How about swapping the front rotors and calipers to the 1500HD units,
I was reading that the 1500HD trucks received larger rotors that perform better.

[SLJ2137694]

Originally Posted by j cAT

this reported problem was pedal to floor...replaced front wheel bearing and the problem is solved.....


If the sensor output was dropping out for more that 15millisec... then the abs should activate... this would mean pulsating brake pedal....not pedal to floor...


If the ABS has an excessive dump/isolation time this would cause the symptom of pedal to floor...


If this were my vehicle I would make sure that when the wheels lock up that the ABS is pulsating....if not there is a problem.. need DTC...

I think you keep missing the point! Many times an unexpected false ABS cycle is perceived by the driver to be a "pedal to the floor" complaint. Many drivers don't know how the pedal feels during an ABS activation. I have chased too many of these complaints only to find that what actually happened was an ABS activation and the pedal moves. Since the pedal moved and it wasn't expected it must have gone to the floor! Try to fix that! Always investigate the possability of an ABS activation, either a legitamate activation or a false cycle before you start chasing a possability that the pedal did go to the floor due to an internal hydraulic problem.
ALSO, how does new fluid give higher/better pressure to the pads? Is there more to this you need to mention?

[Wayne60]

Here is a great article regarding the fluid


http://www.babcox.com/editorial/bf/bf50412.htm

[j cAT]

I can't say what happened with what this vehicle owner felt...I can only say many times ABS havs activated with me driving and I never had pedal to floor...

The only time's I had pedal to floor was when the brake line ruptured at the point were there was a rust bubble...Should be s/steel lines on all vehicles..


as far as the brake fluid I'm surprised that you are not aware or maybe your playing with me on my extensive knowledge concerning brake fluids and contamination...


these fluids need be replaced periodicly...especially the fluid in the calipers as the heat and moisture change the fluid so that it does not compress as new fluid would...

I used to measure this pressure many times over many years and new clean uncontaiminated fluid always produces the correct car builders designed pressure..

ABS systems are very sensitive to bad fluid...


only this guy knows what his brake fluid looks like and he's not talking..

[Wayne60]

Originally Posted by Wayne60

How about swapping the front rotors and calipers to the 1500HD units

Any thoughts on this approach ?


Thanks,
Wayne

[j cAT]

Originally Posted by Wayne60

Here is a great article regarding the fluid


http://www.babcox.com/editorial/bf/bf50412.htm

wayne thanks for that site on brake fluid....the vehicle I once owned for 17 years had no brake componet failures all original at 380,000mi then I sold it....I got my monies worth ....I did periodicy replace the brake fluid....always on a very dry warm day...I suggest that , as this article stated not to believe the big 3 or should I say little 3 that brake fluid should last the life of the vehicle....


but to be fair as we all know these vehicles are to be scrapped at 100,000mi and 7 years...because that is the little 3 automakers life expectency......


funny how mercedes recommends to replace brake fluid every year..but GM states it's good for the vehicle's life...