Check to see if it has a mechanically operated equalizer valve in rear lines and if so disconnect actuating rod and tie valve open to allow fluid flow
How to fix brake will not bleed out
Bleed the master cylinder.& then rebleed the system.
Soft pedal is caused by air in the system. Bleed the brakes starting at RR, then LR, RF, and ending at LF.
No, as long as your pedal seemed good before the brake job, and you do not loosen the bleeder at all, you do not have to bleed the brakes.
brake proportioning valve is reading a problem for the brakes you can bleed rear brakes they might have air in them chck you rear wheel cyl. or unplug the wire to the valve near the master cyl.
brake calibers might need replacing,the pistons might be getting stuck,its easy to replace.
brakes do not release
If you replace any brake component that breaks the brake fluid seal or you let it get very low of brake fluid, yes, you must bleed the brakes.
you dont you bleed and adjust the brakes
There should be no need to bleed the brakes after replacing the rear (or front) brake pads. Make sure you place a rag around the top of the fluid reservoir to catch any excess as you press the pistons back into the caliper body though. If the brake pedal has gone spongy after pad replacement this suggests that the piston seals have failed or the caliper cylinder facess have corroded. On mine the bleed nipples are on the caliper body.
To bleed brakes on your 2008 Uplander front and rear, disconnect the brake line at the caliper.
Does this Blazer have four wheel disc Brakes? NEW ANSWER: There's no reason to bleed brakes if you did not open the system.( where brake fluid came out )