How do i bleed the brakes on a 2000 chevy tahoe z71?

SOURCE: Bleeding Brakes on a 2001 Silverado Z71

Tony,

When bleeding brakes after the system has been opened for service (you didn't say if you were doing any work on the master cylinder) you should start with the farthest wheel away from the master cylinder, which is the righ rear. Fill the master cylinder, then have an assitant "pump up" the brake pedal. Tell them to hold it down firmly, then open the bleeder on the wheel cylinder(s). Do not release the brake pedal until you have closed the bleeder valve again. You'll know when the air is out - there won't be any more bubbles. Since this vehicle is 2001, this would be a great opportunity to flush the system. Just make sure you have enough brake fluid (DOT 3 or 4, depending on your vehicle). Good luck!

SOURCE: I have 2000 Chevy Tahoe Z71. The security light stays on

1999 chevy tahoe security light goes on while im driving does
not seem to cause any problem

SOURCE: bleeding brakes 2000 suburban wsith ab

Why were the brake lines replaced?

Sounds like the mastercylinder may have run dry. You have to bench bleed the master and then DO NOT allow fluid to run low, while bleeding brakes...

if master cylinder runs low on fluid and air gets in, almost impossible to bleed with out releasing the lines and bleed master it self.

SOURCE: 97 Chevy Silverado Brake Problem

start bleding again from left to rigt all the way around.

SOURCE: Why is my fuel gauge on my 2000 chevy tahoe moving

you are probably correct. there are two contacts on the level sensor that wear out, which gives you the fluctuating gauge.