thanks for coming back and following up with what the problem turned out to be.

 

Yea the worst is when you finally find a dead thread describing your problem and the OP doesn’t update it. Haha

 

No safety/combo valve .....2006
Red brake light function is generated by the ABS unit
ALSO.... the brake fluid level sensor could be the culprit here
Might check that first
I have had them fail just cause ya mess with it so.....

Turn key on , look at red brake light . Then unplug level sensor see if light goes out

 

GOT IT!!! Unplugged the float sensor and all is back to normal. Thank you everyone for your help and suggestions!

 

03 has a safety valve . The G series I worked on the other day (99) had it mounted on the front of the ABS unit. Kinda wierd but it worked

 

--------------

 

shuttles to one side or the other when one side of the system loses pressure. Closes off the side with no pressure to keep the functioning side operable. Also has a notch in the spool part of the valve to shuttle the pin on the brake warning switch

 

AS Per FSM
Hydraulic brake pressure balance control system regulates brake fluid pressure delivered to the wheel brake circuits , in order to control the distribution of force
Pressure balance control is through dynamic rear proportioning (DRP), which is a function of the ABS modulator

Just a quote from the FSM
I was gonna copy and paste but it wont let me

Keep in mind it did not mention the rpo brake option so.....

 

I have seen plenty of 04 05 etc that have no safety valve /combination valve
Often wondered why .
I stumbled across the answer (or at least I thought i did) here a while back

 

That is a safety valve
The Factory service manual says the prop valve function is part of the ABS
That is based on info for a 2004 1500. Not sure of RPO for brake options though
What year is your rig SS ?

 

Mine is '03 1500 4.8L. How does a safety valve function? Thanks

I gotta admit, I woulda bet $1,000 that was a proportioning valve on my truck.....................

 

Actually, the problem is we don't know what truck the o.p. has, so it may or may not have a proportioning valve. the abs bleeding procedure also varies with what truck it is.
@RealSlimBaby , update your accounts signature to include the year/make/model/engine/trim level of your truck, so we can better help you.

 

I updated my account details.

 

Ahh, interesting discussion, thanks. If there is no proportioning valve, what is this in the pic below (pic of my engine)?

 

As I stated in my previous post #14. No prop valve .
Rear wheel brake pressure is regulated by the rear section of the ABS , for normal non ABS braking
The scanner should instruct you which bleeders to open and when while performing an automated bleed

 

he scanner cycles he ABS pump motor ad pushes fluid through the dump valves, isolation valves and accumulators to pure any air trapped in the Antilock part of the system .
Proportioning valve is non existant on these as it is a software function built into the ABS electronics

 

Ok I have the scanner that lumps ABS. So if I understand correctly I have to bleed and the auto pump at every wheel? Because I ram the abs pump a couple times but all the bleed valves were closed.

 

D an automated bleed anyhow. And then rebleed as a base brake system.If that doesnt clear it up, then likely the ABS module is faulty

 

Tell me more about automated bleed. What is it?

 

Haynes is the jiffy lube of auto repair manuals.

The other things, given your original work being flushing the brakes, is that
a) you flushed some debris into the brake system, causing some problem
b) the MC ran dry, and there's still air in the system somewhere, causing the problem

 

Debris, maybe. Definitely did not run dry. I made sure if that

 

Maybr dig through charm.li for your truck, or go through the full service manual (paper or subscription) and go through the diagnostic procedure for it?

 

I’ll try to find it. I have a Haynes manual and didn’t see anything for that.

 

Proportioning valve is built into the abs module, and as far as I know, is not adjustable, perhaps short of disassembling and dremelling...

If the light is on, perhaps use a code reader that can get abs codes and scan it?

 

I have a reader that does abs codes. It is not picking up any codes because the ABS light is not on.

 

Haha, that's how the pic was labeled. Doesn't affect my answer. All I was looking for was a proportioning valve................

Got the pic here:

 

What 04 Silverado has front leaves?

 

Back in the day, when I was doing this stuff all the time, we would occasionally (but rarely) run into this issue. It seemed to be caused by the proportioning valve. Go to this page How to Repair a Brake Warning Light Problem and the guy explains the valve and how to reset it (Step 4).

If his method doesn't work, try this one. It's been a loooong time since I messed with this exact issue, but I think we used to bleed a front wheel, then test it, then a back wheel, then test it.... this would get the sensor back to the center eventually.

Here's a pic of the system for '04 Silverado (not sure exactly what you have):

 

So turns out we don’t have proportioning valves in our trucks. And I tried to do the hard stops many times to no avail.