Have an '04 S10/Colorado master cylinder and proportioning valve on my P15. Is front line front brakes and vice versa or do I plumb it the other way ?
If the GM system is Disc up front and drum out back the larger of the two reservoirs in the master cylinder is the front and smaller is the back.
It looks like the rear section is slightly larger (plastic res with plug in the middle). Will swap lines, re bleed and see if they work better. The rears just don't want to function very well and not getting much peddal.. All steel and rubber lines are new, calipers and rear wheel cylinders gone through, rears adjusted good, new booster good MC. Had young grandson helping to bleed. Will get someone else to help this time.
The Jalopy Journal
