witch booster is on your truck may be over boosting the brake leading to not feeling like there is entry pedal and how much vacuum are you producing not enough and the booster wont work or the boosters bad this dose not help with the air in lines
As far as I know it's the stock booster. I did ck the vacuum and it is pulling 18 psi at idle with the gauge hooked up to the nipple for the cruise control. But the booster would have nothing to do with air getting in the system when I bleed while the truck is not running.
