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Username Post: 97 k1500 brake problems        (Topic#180137)
Aggieranch 
Junior Contributor
Posts: 106
Aggieranch
Age: 46
Loc: Hunt, TX
Reg: 09-05-07
01-20-08 07:50 PM - Post#1347350    

I hang out most of the time with the old Impala crowd. I have one for the truck guys though. It's a 97 k1500 that has 70k miles. I changed the pads about a year ago. I could not get a firm pedal like it used to be with the old pads. I even took the master off and bench blead it. I then took it to a local mechanic after that which he coud not fix. Last month I took it to a dealer. They replaced everything master, booster, and the new Napa pads that were on it. I'm still not getting a firm pedal like it used to be and this truck drags a 6k pound trailer behind it when it is usually driven. At least the trailer brakes are good. It's not near what it used to be and I get the excuse that the brakes are normal for this year from the dealer. I'm having heated discussions with the dealer right now after spending too much on this truck without it braking correctly. I bought it new, so I know how the brakes should feel. I've converted older cars over to disc brakes and done lots of brake work, but these newer ones have me going crazy. Especially after spending lots of money at the dealer and getting an excuse.

Thanks, Spencer
1962 Impala Convertible,1956 truck in progress


 
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CDAUSA 
Needs to Get Out More Member
Posts: 12906

Loc: Texas Panhandle
Reg: 12-31-01
01-20-08 10:42 PM - Post#1347466    
    In response to Aggieranch

HMMMM? Best guess is unless the brake system was flushed and cleaned out at least yearly-----when you compressed the caliper piston back in (unless you loosened the hose) it broke some crud loose in the master, maybe damaged a piston cup.

From that point on, it just hasn't been bled completely yet. At times like these, it doesn't bother me a bit to use a gallon of brake fluid thru a brake bleeder-----and sometimes it takes that to finally get all the air out.

Just so you are comparing apples to apples, make sure the rear brakes are adjusted up tight. The rears were bled, correct?

GEEEESH, I wish mine only had 70K

 
someotherguy 
Moderator
Posts: 25749
someotherguy
Age: 44
Loc: Texas
Reg: 08-01-03
01-21-08 07:05 AM - Post#1347586    
    In response to CDAUSA

Spencer, the reason the dealer is telling you it's "normal" is because spongy brakes are a very, very common complaint with our trucks. I don't agree with that it's "normal" though and I don't blame you for feeling the same way - it's a cop-out for anyone to just write it off because they can't figure it out.

I wish I had something more helpful than that to add, but at least I'll agree that you're not crazy; these trucks *can* have good brakes but something seems a little fragile about the system in that a lot of people end up with mushy brakes and not many "mechanics" - even at the dealership - seem to be able to figure out why.

Richard
94 C2500LD / 97 Suburban LS1 / 06 300C SRT8
Check out my truck shop projects


 
wymjym 
Frequent Contributor
Posts: 1322
wymjym
Loc: near Austin,Tx
Reg: 04-12-02
01-21-08 09:46 AM - Post#1347683    
    In response to someotherguy

as Richard has stated...something happens and rarely are the brakes ever fixed again.
I am not familiar with the 97 setup but my 88 went through the same bs, I finally resolved my problems by removing the rear abs module along with the combination valve. I am convinced that the combination valve was the culprit in my setup. I changed so many items that I ended up with a hydroboost+adj prop valve+ rear disk upgrade. The brakes are very responsive and I have no complaints any longer.
good luck
wj

 
Chris O. 
Member
Posts: 145
Chris O.
Age: 41
Loc: Cedar Springs, Michigan
Reg: 10-01-05
01-21-08 09:50 AM - Post#1347688    
    In response to Aggieranch

I have had the same problem in the past with my 92, and 95 1500's and my 90 Suburban. I bled the brakes starting with the rears first. Why? I don't know, but I had a reason at the time. So, this is how I have done it since.. Firm pedal up on all three trucks after bleeding.

Richard is right saying it is a common complaint, but it should be fixable. CDAUSA could be right about loosening up some crud in the system. Most people only bleed the affected area in the system they worked on (guilty when rushed). The entire system needs to be bled. Oh, and then bled again. I only use a vac. bleeder to get me in the ballpark, the rest is done by pumping the pedal and cracking the bleeder screws, one by one.


I hate soggy pedal.
YMMV,
Chris
'99 Z71 2 Door Tahoe


 
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