CERTAIN MEDIUM DUTY PICKUP TRUCKS EQUIPPED WITH AIR BRAKES THAT INCLUDE THE OPTIONAL TRAILER PACKAGE FAIL TO COMPLY WITH THE REQUIREMENTS OF FMVSS NO. 121, "AIR BRAKE SYSTEMS." TH
A LEAK IN THE PRIMARY AIR CIRCUIT OR SECONDARY AIR CIRCUIT COULD RESULT IN A REDUCTION OR
DEALERS WILL RE-ROUTE THE AIR LINES CONNECTED TO THE TRACTOR PROTECTION VALVE. OWNER NOTIF












