Parking brake will not disengage 2007 GS Sunvoyager
2007 Gulfstream Sunvoyager, with Freightliner chassis, Allison 5 speed trany and 300 Cummins FRED. When put in driving gear parking break will not disengage. "Brake" dash light flashes and alarm is sounding but will not disengage. I tried the manual disengage by going to drive gear, then neutral as the manual says but still not work. Help, I can't move my coach.
The leveling jacks are up, the slides are in so that's not the issue.