http://auto-recalls.justia.com GMC:B6P042:1982 Recalls http://auto-recalls.justia.com/content/84V134000-GMC-B6P042-1982.html VEHICLES HAVE A PRIMARY AND A RESERVE BRAKING SYSTEM. IF THE PRIMARY BRAKE SYSTEM BOOSTER FAILS, UNDER SOME CIRCUMSTANCES THE RESERVE SYSTEM MAY ALSO MALFUNCTION AND BRAKING ABILITY WILL BE IMPAIRED. Fri, 9 Nov 1984 00:00:01 EST