A/C - Air Flow Switches From Dash to Floor
DCS NO. 84-03SUBJECT: AIR CONDITIONER/HEATER AIR FLOW 9/20/83
TO: ALL BUICK DEALERS AND ALL ZONES IF YOU ENCOUNTER A CONDITION ON EARLY 1984 RIVIERAS EQUIPPED WITH C60 AND LV2 ENGINES, WHERE THE AIR SWITCHES FROM THE AIR CONDITIONER OUTLETS TO THE HEATER OUTLETS DURING HEAVY ACCELERATION, IT CAN BE CAUSED BY REVERSED VACUUM HOSES BETWEEN MANIFOLD VACUUM SOURCE AND ROUND VACUUM TANK. THE THIN PURPLE AND THICK BLACK VACUUM HOSES GOING TO THE HVAC MAY BE REVERSED. THE BLACK HOSE SHOULD BE CLOSEST TO THE VACUUM SOURCE.
J. D. MACK, MGR, TECH. SERVICE JDM/GW 9-20-83