Another guy with brake problems

[ChevyTech]

It has always seemed to me that on these trucks, if the pedal has excess travel, it is hard to get the tires to skid. I think this is because of the way the brake booster is made.

Often the rear brakes are the cause of a low pedal on these trucks. The lining needs to be close enough to the drums so if it has worn brakes, or a rusted adjuster, or any other mechanical brake deficiency it needs to be taken care of.

There are many things that contribute to a low pedal that people miss.
Loose front wheel bearings allow the rotor to tip moving the piston back in the caliper.
Warped front rotors will push the pistons back in the calipers.
Out of round rear drums will not allow the brake to be adjusted as close to the drum.

When these trucks pull to one side during braking, it is usually caused by a restricted front brake hose.

If the brakes have been bleed 6 times there is no point in having the guy bleed them again. If he does not have the air out by now he is using poor technique or has no idea what he is doing.

I have never used a gauge to test pressure of solve a low brake pedal problem.

I have a 1993 Silverado. If you put most car buffs behind the wheel and they will think it has had a 4 wheel disc brake conversion done to it. My brake pedal has Very little travel and the truck can skid the tires. To get my truck back to this condition it took to new rear wheel cylinders because they were seeping which can allow air in. I cleaned the adjusters and adjusted them by hand. It also took a new front brake hose because one was restricted, and this happened when the truck had low miles on it. I rebuilt the front calipers but they were in good condition, and I found no issues with them. I took the time to fix it because when switching back and fourth between my vehicles a low pedal is alarming after getting used to 4 wheel disc brakes and a high pedal. These trucks can have a nice high pedal.

NOTE: There are two different styles of rear brakes / backing plates on these trucks.

Can you get a good pedal with the truck setting still and is the pedal only low after driving it?

Will the brakes on your truck pump up to have a higher pedal?

Have you pumped up the brakes and then applied the parking brake before releasing the brake pedal to see if it has a higher pedal the next time you apply the brakes when doing this?