| EDWARDS CHEVROLET BUICK GMC Council Bluffs, IA | 24 | -$7,750 | 24 |
| GREGG YOUNG CHEVROLET GMC ATLANTIC Atlantic, IA | 4 | -$6,269 | 4 |
| VAUGHN AUTOMOTIVE Ottumwa, IA | 5 | -$6,136 | 5 |
| GREGG YOUNG BUICK GMC, LLC Indianola, IA | 8 | -$5,968 | 8 |
| EDWARDS CHEVROLET GMC Storm Lake, IA | 3 | -$5,083 | 3 |
| KARL CHEVROLET GMC Webster City, IA | 8 | -$4,385 | 7 |
| KEMNA AUTO OF FORT DODGE Fort Dodge, IA | 4 | -$4,171 | 4 |
| KEAST AUTO CENTER Harlan, IA | 1 | -$4,076 | 1 |
| KARL GMC OF MARSHALLTOWN Marshalltown, IA | 6 | -$4,036 | 6 |
| STEW HANSEN BUICK GMC Clive, IA | 33 | -$3,983 | 29 |
| MIKE MOLSTEAD CHEVROLET, GMC Charles City, IA | 1 | -$3,510 | 1 |
| BOB BROWN BUICK GMC Ankeny, IA | 49 | -$3,423 | 47 |
| STEPHEN CHEVROLET GMC Monticello, IA | 1 | -$3,370 | 1 |
| PELLA MOTORS Pella, IA | 7 | -$2,618 | 7 |
| LAUTERBACH BUICK-GMC Newton, IA | 1 | -$2,600 | 1 |
| DEERY BROTHERS, INC. West Burlington, IA | 5 | -$2,496 | 5 |
| LE MARS GMC Le Mars, IA | 33 | -$2,174 | 31 |
| SHOTTENKIRK, INC. Fort Madison, IA | 7 | -$1,393 | 6 |
| ED MORSE CHEVROLET BUICK GMC Muscatine, IA | 10 | -$855 | 9 |
| DEYARMAN AUTOMOTIVE Knoxville, IA | 3 | -$789 | 3 |
| DALE HOWARD, INC. Iowa Falls, IA | 3 | -$222 | 3 |
| MCGRATH BUICK GMC CADILLAC Cedar Rapids, IA | 15 | -$191 | 15 |
| ED MORSE CHEVROLET GMC NORTHEAST De Witt, IA | 19 | -$162 | 18 |
| CHARLES CAPPER AUTO CENTER, INC. Marengo, IA | 2 | $0 | 2 |
| RICHARDSON BUICK-CADILLAC-GMC TRUCK Dubuque, IA | 2 | $0 | 2 |
| KEMNA AUTO CENTER Algona, IA | 1 | $0 | 1 |
| REX CHEVROLET GMC, LTD Odebolt, IA | 1 | $0 | 1 |
| NIELSEN MOTORS Humboldt, IA | 4 | $0 | 4 |
| BILLION COMMUNITY, INC. Iowa City, IA | 8 | $0 | 8 |
| PAT CLEMONS, INC. Boone, IA | 3 | $0 | 1 |
| BILLION GMC Sioux City, IA | 8 | $0 | 8 |
| GREEN BUICK GMC INC. Davenport, IA | 36 | $0 | 36 |
| BILLION CHEVROLET GMC Clinton, IA | 6 | $0 | 6 |
| STALKER CHEVROLET GMC Creston, IA | 2 | $0 | 2 |