actuator

I posted a note yesterday for advice on removing a turbo from a 2013, now I wonder if I am chasing the right rabbit. I get the P003A error occasionally. My truck still runs pretty well when pulling a gooseneck with about 8000lbs, and when hauling a ~2000lb slide-in camper up hills in a head...

Help, I'm really in a pickle. I have a 1990 Pace Arrow on a Chevy P-30 chassis. I can not get the parking brake to function. Replaced power steering pump, front calipers and flushed system with new fluid. I get pressure from the spool valve but no pressure to parking brake. Every mechanic I...