| STEPHEN CHEVROLET GMC MONTICELLO, IA | 3 | -$7,728 | 3 |
| COMMUNITY BUICK GMC, INC. Waterloo, IA | 8 | -$7,000 | 1 |
| VAUGHN AUTOMOTIVE Ottumwa, IA | 15 | -$6,766 | 15 |
| MCGRATH BUICK GMC CADILLAC Cedar Rapids, IA | 17 | -$6,350 | 17 |
| STEW HANSEN BUICK GMC Clive, IA | 10 | -$6,239 | 10 |
| PELLA MOTORS Pella, IA | 3 | -$6,207 | 3 |
| BOB BROWN BUICK GMC Ankeny, IA | 32 | -$5,783 | 32 |
| KARL CHEVROLET GMC Webster City, IA | 30 | -$5,608 | 30 |
| EDWARDS CHEVROLET BUICK GMC Council Bluffs, IA | 9 | -$5,605 | 9 |
| GREGG YOUNG CHEVROLET GMC ATLANTIC ATLANTIC, IA | 7 | -$5,283 | 7 |
| KARL GMC OF MARSHALLTOWN Marshalltown, IA | 19 | -$5,128 | 19 |
| LE MARS GMC LE MARS, IA | 11 | -$5,113 | 11 |
| GREGG YOUNG BUICK GMC, LLC Indianola, IA | 6 | -$5,000 | 6 |
| KEMNA AUTO OF FORT DODGE Fort Dodge, IA | 4 | -$4,723 | 4 |
| ED MORSE CHEVROLET BUICK GMC MUSCATINE, IA | 3 | -$4,000 | 3 |
| MIKE MOLSTEAD CHEVROLET, GMC Charles City, IA | 16 | -$3,940 | 8 |
| DEYARMAN AUTOMOTIVE Knoxville, IA | 3 | -$3,706 | 3 |
| SHOTTENKIRK, INC. Fort Madison, IA | 11 | -$3,685 | 9 |
| FOREST CITY AUTO CENTER Forest City, IA | 5 | -$3,189 | 5 |
| ED MORSE CHEVROLET GMC NORTHEAST DE WITT, IA | 18 | -$2,956 | 18 |
| DALE HOWARD, INC. IOWA FALLS, IA | 4 | -$2,812 | 4 |
| VAUGHN AUTOMOTIVE OTTUMWA, IA | 10 | -$2,722 | 10 |
| EDWARDS CHEVROLET GMC Storm Lake, IA | 1 | -$2,712 | 1 |
| NIELSEN MOTORS Humboldt, IA | 4 | -$2,710 | 4 |
| ED MORSE CHEVROLET BUICK GMC Muscatine, IA | 1 | -$2,300 | 1 |
| KEAST AUTO CENTER HARLAN, IA | 6 | -$2,215 | 6 |
| KEMNA AUTO CENTER ALGONA, IA | 4 | -$1,000 | 4 |
| GREEN BUICK GMC INC. Davenport, IA | 23 | $0 | 23 |
| RICHARDSON BUICK-CADILLAC-GMC TRUCK Dubuque, IA | 14 | $0 | 14 |
| CHARLES CAPPER AUTO CENTER, INC. Marengo, IA | 6 | $0 | 6 |
| BILLION COMMUNITY, INC. Iowa City, IA | 5 | $0 | 5 |
| BOB STEPHEN MOTORS-INC. Manchester, IA | 3 | $0 | 3 |
| BILLION COMMUNITY, INC. IOWA CITY, IA | 3 | $0 | 3 |
| BILLION GMC SIOUX CITY, IA | 1 | $0 | 1 |
| GLENDENNING MOTOR CO. INC. Mount Ayr, IA | 1 | $0 | 1 |
| PAT CLEMONS, INC. BOONE, IA | 1 | $0 | 1 |
| WEIS GMC, INC. DECORAH, IA | 1 | $0 | 1 |
| REX CHEVROLET GMC, LTD Odebolt, IA | 1 | $0 | 1 |
| REX CHEVROLET GMC, LTD ODEBOLT, IA | 1 | $0 | 1 |
| GRINNELL MOTORS GRINNELL, IA | 1 | $0 | 1 |
| BILLION CHEVROLET GMC Clinton, IA | 3 | +$5,325 | 2 |
| LAUTERBACH BUICK-GMC NEWTON, IA | 2 | — | 0 |