| VAUGHN AUTOMOTIVE Ottumwa, IA | 2 | -$2,695 | 2 |
| NIELSEN MOTORS Humboldt, IA | 1 | -$2,445 | 1 |
| ED MORSE CHEVROLET BUICK GMC Muscatine, IA | 2 | -$1,558 | 2 |
| LE MARS GMC LE MARS, IA | 8 | -$1,401 | 8 |
| FOREST CITY AUTO CENTER Forest City, IA | 1 | -$1,115 | 1 |
| ED MORSE CHEVROLET GMC NORTHEAST DE WITT, IA | 3 | -$918 | 3 |
| DEYARMAN AUTOMOTIVE Knoxville, IA | 4 | -$898 | 4 |
| KARL CHEVROLET GMC Webster City, IA | 4 | -$815 | 4 |
| DALE HOWARD, INC. IOWA FALLS, IA | 2 | -$600 | 2 |
| KEMNA AUTO OF FORT DODGE Fort Dodge, IA | 4 | -$523 | 4 |
| STEW HANSEN BUICK GMC Clive, IA | 7 | -$352 | 6 |
| BOB BROWN BUICK GMC Ankeny, IA | 13 | -$11 | 11 |
| COMMUNITY BUICK GMC, INC. Waterloo, IA | 6 | $0 | 4 |
| KARL GMC OF MARSHALLTOWN Marshalltown, IA | 6 | $0 | 6 |
| RICHARDSON BUICK-CADILLAC-GMC TRUCK Dubuque, IA | 5 | $0 | 5 |
| PAT CLEMONS, INC. BOONE, IA | 3 | $0 | 3 |
| GLENDENNING MOTOR CO. INC. Mount Ayr, IA | 3 | $0 | 3 |
| MIKE MOLSTEAD CHEVROLET, GMC Charles City, IA | 3 | $0 | 3 |
| LAUTERBACH BUICK-GMC Newton, IA | 2 | $0 | 2 |
| KEMNA AUTO CENTER ALGONA, IA | 2 | $0 | 2 |
| BILLION COMMUNITY, INC. IOWA CITY, IA | 2 | $0 | 2 |
| MCGRATH BUICK GMC CADILLAC Cedar Rapids, IA | 2 | $0 | 2 |
| BILLION GMC SIOUX CITY, IA | 2 | $0 | 2 |
| LAUTERBACH BUICK-GMC NEWTON, IA | 1 | $0 | 1 |
| BOB STEPHEN MOTORS-INC. Manchester, IA | 1 | $0 | 1 |
| CHARLES CAPPER AUTO CENTER, INC. Marengo, IA | 1 | $0 | 1 |
| BILLION CHEVROLET GMC Clinton, IA | 1 | $0 | 1 |
| BILLION COMMUNITY, INC. Iowa City, IA | 1 | $0 | 1 |
| CHARLES CAPPER AUTO CENTER, INC. MARENGO, IA | 1 | $0 | 1 |
| SHOTTENKIRK, INC. Fort Madison, IA | 6 | +$77 | 5 |
| EDWARDS CHEVROLET BUICK GMC Council Bluffs, IA | 62 | +$350 | 57 |
| GREEN BUICK GMC INC. Davenport, IA | 4 | +$1,770 | 3 |
| KEAST AUTO CENTER HARLAN, IA | 4 | +$2,156 | 3 |
| PELLA MOTORS Pella, IA | 3 | +$2,542 | 2 |
| GRINNELL MOTORS GRINNELL, IA | 1 | +$6,697 | 0 |
| WEIS GMC, INC. DECORAH, IA | 1 | +$7,505 | 0 |
| GREGG YOUNG BUICK GMC, LLC Indianola, IA | 1 | — | 0 |
| ED MORSE CHEVROLET BUICK GMC MUSCATINE, IA | 1 | — | 0 |