Tonyrodz's Tahoe Build Thread

[Geotrash]

I still haven't had time to look any further into the brake situation. What else would cause a soft pedal that goes almost to the floor?

Hydraulic systems are supposed to be closed systems, so the MUST either be a leak that's allowing air to enter when the pedal is released, or there is a component that is unable to hold the pressure generated by the pedal - either through volumetric expansion (e.g. a weak hose), or through leakage (e.g. a caliper piston, fitting, bleeder valve, ABS actuator, master cylinder). The only way I know to find such a thing is to trace it down methodically.

 

[Tonyrodz]

Hydraulic systems are supposed to be closed systems, so the MUST either be a leak that's allowing air to enter when the pedal is released, or there is a component that is unable to hold the pressure generated by the pedal - either through volumetric expansion (e.g. a weak hose), or through leakage (e.g. a caliper piston, fitting, bleeder valve, ABS actuator, master cylinder). The only way I know to find such a thing is to trace it down methodically.

I agree, but the weather hasn't wanted to cooperate. Finicky PITA--That’s why they call it MOTHER nature(female lol)

 

[97YukonNZ]

There is a few years between our models but when I first got the Yukon it failed on a warrant of fitness check here because the tech thought the brake pedal dove in too far when braking.

They blame the seal in the master

So I had an oem sent from Rock and changed and bled it. Passed the warrant as they could see the new master in place.

It didn't change the distance the pedal dropped and so 2 wofs down the road they tried to fail it again so I told him to hit the brake like you mean it and he was shocked how quick she hit the picks.

When bleeding I got some rotten old fluid out but did not fully bleed fresh fliud through and I wonder if maybe the breakdown of the fluid could be causing this?

Maybe a similar thing for your truck.

 

[Tonyrodz]

There is a few years between our models but when I first got the Yukon it failed on a warrant of fitness check here because the tech thought the brake pedal dove in too far when braking.

They blame the seal in the master

So I had an oem sent from Rock and changed and bled it. Passed the warrant as they could see the new master in place.

It didn't change the distance the pedal dropped and so 2 wofs down the road they tried to fail it again so I told him to hit the brake like you mean it and he was shocked how quick she hit the picks.

When bleeding I got some rotten old fluid out but did not fully bleed fresh fliud through and I wonder if maybe the breakdown of the fluid could be causing this?

Maybe a similar thing for your truck.

I installed a brand new GM mc. The fluid is probably 2 yrs old. I really need to get this sorted out. Kills me just sitting there parked.

 

[97YukonNZ]

I installed a brand new GM mc. The fluid is probably 2 yrs old. I really need to get this sorted out. Kills me just sitting there parked.

Yes some space in a shed would help you to gat at it out of the weather.
And she is otherwise running pretty good now eh