When initially engaging the brakes my truck pulls left, as i continue to exert pressure to the pedal it begins to brake normally (straighten itself back out). I have recently replaced the entire braking system to include. Both front calipers and hoses, front pads, front rotors and hub assembly's, both rear wheel cylinders, shoes, both rear drums. The brake lines do not seem to have any kinks in them and like I said, the hoses are new. ...Im leaning toward the combination valve being bad! Does anyone else have an idea? ...If it is the combination valve, does anyone have any idea if they make aftermarket ones for this truck?

Ive called:
autozone/kunckles/advanced auto/salvos/napa and the dealer!!! They no longer make the part, and none of these suppliers can get it.

Thanks for the help.

 

Try braking with the parking brake to determine if the problem is coming from the front or back.

 

You may have a faulty front caliper or need to lube them, rebuilt parts aren't as carefully rebuilt as they used to be...

Also, I would check the rotors/pads for signs of dragging.

 

I was just about to post the samething...Bought two calipers from NAPA...In 2 months,one side started to pull...Problem is...Is one side have to much pressure or not enough...Bought another set and those worked..

 

I had this problem a while back and decided i must have gotten a faulty caliper, so i went back to auto zone and the gave me 2 new calipers (again) and I up graded the pads. The pads on the left side were almost worn all the way down and the right side looked almost new! so needless to say they have been replaced twice and im still having an issue. I guess there could be a clog in one of the new hoses?!?! Im thinking about getting another set, but maybe the stainless steel breaded ones! ...If you drove the truck you would be able to tell both calipers are engaging, just the left side is doing so before the right side.

 

Sounds like a distribution issue, or the pistons are hanging up in the caliper bores....

 

Caliper, just did mine again, faulty, make sure you are changing your fluid at least once a year, COMPLETELY. If you live in a wet area, your fluid will abosorb the water, water wreaks havoc inside the calipers.