Brake Pedal Travel Issue, Soft brakes
#1
Brake Pedal Travel Issue, Soft brakes
Well, to keep it short and sweet I have been having issues with the brake pedal travel on this truck since the day I purchased it. All of the brake system is O.E. or O.E. replacement. I have a somewhat soft pedal that depresses 4" total when the engine is running, compared to the maximum travel spec of 2.5" out of a Haynes manual.
I have bled the system 3 times and flushed with new fluid twice since I have owned it, since 78,000 miles. My girlfriend's 2006 RCSB 4x4 5.3 brake pedal is completely solid compared to mine, she has noted on many occasions that while driving my truck my pedal just seems to be soft compared to her truck. For her to notice that is pretty big, as she is not very in-tune to the nuances of vehicles various problems.
I have gone through the vacuum booster check listed in the Haynes manual and have come away believing it is all right. Might this be a master cylinder issue? Any thoughts on this are appreciated. Thanks.
I have bled the system 3 times and flushed with new fluid twice since I have owned it, since 78,000 miles. My girlfriend's 2006 RCSB 4x4 5.3 brake pedal is completely solid compared to mine, she has noted on many occasions that while driving my truck my pedal just seems to be soft compared to her truck. For her to notice that is pretty big, as she is not very in-tune to the nuances of vehicles various problems.
I have gone through the vacuum booster check listed in the Haynes manual and have come away believing it is all right. Might this be a master cylinder issue? Any thoughts on this are appreciated. Thanks.
#2
I work for GM and the other day I was helping another tech with a Trailblazer. Your problem is very simliar to that trailblazer. The TB problem was a brake modulator valve I believe it was called. I dont know if our trucks have one, but look it up in your hayes book.
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#8
#9
Just a couple non-hydraulic things to check for are siezed slide pins and a very loose wheel bearing. Either of these will give you a spongy pedal and decreased braking performance.
#10
Thanks for these ideas. I don't believe it is the wheel bearings as my front tires are wearing quite well. I did not notice any slop in the front wheels (side to side and top to bottom) 9 months ago, as that was the last time I bled and flushed the system and applied anti squeal to the pads.
I appreciate this guys, thanks.
Just sick of getting out of my truck and driving the girlfriend's rig and not wanting to get back in mine!