1991 GEO STORM ELECTRICAL DIAGNOSIS SERVICE  MANUAL SUPPLEMENT - ORIGINAL - ST371-91EDM. This is the Manual that Supplements the 1991 GEO STORM Service manual.  It covers ELECTRICAL DIAGNOSIS, WIRING DIAGRAMS, COMPONENT LOCATIONS AND DIAGNOSTIC CHARTS, ETC..  Measures 8 1/2" X 11".  Used Condition from a GM Dealership.  Will be packed with added protection and promptly shipped.