| EDWARDS CHEVROLET BUICK GMC Council Bluffs, IA | 9 | -$7,345 | 9 |
| BOB BROWN BUICK GMC Ankeny, IA | 25 | -$7,192 | 24 |
| SHOTTENKIRK, INC. Fort Madison, IA | 1 | -$6,501 | 1 |
| MCGRATH BUICK GMC CADILLAC Cedar Rapids, IA | 13 | -$6,282 | 13 |
| KARL CHEVROLET GMC Webster City, IA | 10 | -$6,251 | 10 |
| GREGG YOUNG BUICK GMC, LLC Indianola, IA | 5 | -$6,000 | 5 |
| VAUGHN AUTOMOTIVE Ottumwa, IA | 6 | -$5,863 | 6 |
| PELLA MOTORS Pella, IA | 6 | -$5,762 | 6 |
| STEW HANSEN BUICK GMC Clive, IA | 12 | -$5,536 | 12 |
| KARL GMC OF MARSHALLTOWN Marshalltown, IA | 11 | -$5,495 | 11 |
| LE MARS GMC Le Mars, IA | 14 | -$5,460 | 14 |
| GREGG YOUNG CHEVROLET GMC ATLANTIC Atlantic, IA | 5 | -$3,600 | 5 |
| DEERY BROTHERS, INC. West Burlington, IA | 4 | -$3,500 | 4 |
| KEMNA AUTO CENTER Algona, IA | 2 | -$3,483 | 2 |
| DEYARMAN AUTOMOTIVE Knoxville, IA | 6 | -$3,435 | 6 |
| KEAST AUTO CENTER Harlan, IA | 4 | -$3,322 | 4 |
| MIKE MOLSTEAD CHEVROLET, GMC Charles City, IA | 6 | -$3,211 | 6 |
| STEPHEN CHEVROLET GMC Monticello, IA | 1 | -$3,162 | 1 |
| FOREST CITY AUTO CENTER Forest City, IA | 1 | -$3,058 | 1 |
| ED MORSE CHEVROLET BUICK GMC Muscatine, IA | 2 | -$3,000 | 2 |
| ED MORSE CHEVROLET GMC NORTHEAST De Witt, IA | 19 | -$2,907 | 19 |
| DALE HOWARD, INC. Iowa Falls, IA | 2 | -$2,500 | 2 |
| NIELSEN MOTORS Humboldt, IA | 4 | -$1,444 | 4 |
| BILLION GMC Sioux City, IA | 3 | $0 | 3 |
| RICHARDSON BUICK-CADILLAC-GMC TRUCK Dubuque, IA | 10 | $0 | 10 |
| CHARLES CAPPER AUTO CENTER, INC. Marengo, IA | 5 | $0 | 5 |
| KEMNA AUTO OF FORT DODGE Fort Dodge, IA | 1 | $0 | 1 |
| REX CHEVROLET GMC, LTD Odebolt, IA | 1 | $0 | 1 |
| GREEN BUICK GMC INC. Davenport, IA | 8 | $0 | 8 |
| BILLION COMMUNITY, INC. Iowa City, IA | 4 | $0 | 4 |
| GLENDENNING MOTOR CO. INC. Mount Ayr, IA | 1 | $0 | 1 |
| BOB STEPHEN MOTORS-INC. Manchester, IA | 2 | $0 | 2 |
| BILLION CHEVROLET GMC Clinton, IA | 5 | +$3,195 | 4 |
| PAT CLEMONS, INC. Boone, IA | 2 | — | 0 |
| LAUTERBACH BUICK-GMC Newton, IA | 1 | — | 0 |