ANALYSIS: THE PROPOSED GM CHANGES SHOULD REDUCE THE FRONT-BIAS IN THEREAR BRAKE SYSTEM.HOWEVER THERE IS NO INDICATION THAT GM WILL RETROFITTHE 1985 AND 1986 MODEL YEAR VEHICLES.REPORTS INDICATE THAT THE PROBLEMMAY NOT LIE IN THE BRAKE BIASING SYSTEM, BUT RATHER IN MALFUNCTIONINGOR IMPROPERLY DESIGNED REAR BRAKE ADJUSTERS.STATUS: ANALYZING RESPONSE FROM GM DATED 5/12/87.AWAITING REPLY FROM NHTSA'S LEGAL STAFF CONCERNING GM'S RESPONSE.TOLD TO SIT ON IT A WHILE BY MR. PARKER AT 8/20/87 BRIEFING.AFTER LEGAL'S REPLY, THE DATA WILL BE UPDATED AND AN ACTIONDECISION WILL BE FORWARDED FOR SUPERVISOR'S REVIEW.===