| VAUGHN AUTOMOTIVE Ottumwa, IA | 5 | -$4,283 | 5 |
| KARL GMC OF MARSHALLTOWN Marshalltown, IA | 10 | -$3,643 | 10 |
| GRINNELL MOTORS GRINNELL, IA | 1 | -$3,237 | 1 |
| VAUGHN AUTOMOTIVE OTTUMWA, IA | 1 | -$3,000 | 1 |
| ED MORSE CHEVROLET BUICK GMC Muscatine, IA | 2 | -$2,860 | 2 |
| ED MORSE CHEVROLET GMC NORTHEAST DE WITT, IA | 8 | -$2,451 | 8 |
| FOREST CITY AUTO CENTER Forest City, IA | 5 | -$2,383 | 5 |
| STEPHEN CHEVROLET GMC Monticello, IA | 2 | -$2,276 | 2 |
| LE MARS GMC LE MARS, IA | 17 | -$1,963 | 16 |
| STEPHEN CHEVROLET GMC MONTICELLO, IA | 1 | -$1,946 | 1 |
| SHOTTENKIRK, INC. Fort Madison, IA | 12 | -$1,857 | 12 |
| MCGRATH BUICK GMC CADILLAC Cedar Rapids, IA | 11 | -$1,754 | 11 |
| GREGG YOUNG BUICK GMC, LLC Indianola, IA | 7 | -$1,751 | 6 |
| KARL CHEVROLET GMC Webster City, IA | 29 | -$1,475 | 29 |
| BOB BROWN BUICK GMC Ankeny, IA | 17 | -$1,422 | 16 |
| DEYARMAN AUTOMOTIVE Knoxville, IA | 5 | -$1,359 | 5 |
| PELLA MOTORS Pella, IA | 4 | -$1,204 | 4 |
| KEMNA AUTO CENTER ALGONA, IA | 2 | -$1,001 | 2 |
| NIELSEN MOTORS Humboldt, IA | 1 | -$1,000 | 1 |
| DALE HOWARD, INC. IOWA FALLS, IA | 2 | -$987 | 2 |
| STEW HANSEN BUICK GMC Clive, IA | 13 | -$733 | 12 |
| KEAST AUTO CENTER HARLAN, IA | 5 | -$375 | 5 |
| GREGG YOUNG CHEVROLET GMC ATLANTIC ATLANTIC, IA | 12 | -$152 | 12 |
| GREEN BUICK GMC INC. Davenport, IA | 20 | $0 | 20 |
| LAUTERBACH BUICK-GMC NEWTON, IA | 6 | $0 | 6 |
| BILLION COMMUNITY, INC. Iowa City, IA | 6 | $0 | 6 |
| WEIS GMC, INC. DECORAH, IA | 4 | $0 | 4 |
| BILLION GMC SIOUX CITY, IA | 4 | $0 | 4 |
| STALKER CHEVROLET GMC CRESTON, IA | 3 | $0 | 2 |
| NIELSEN MOTORS HUMBOLDT, IA | 3 | $0 | 3 |
| BILLION CHEVROLET GMC Clinton, IA | 2 | $0 | 2 |
| REX CHEVROLET GMC, LTD Odebolt, IA | 2 | $0 | 2 |
| KEMNA AUTO OF FORT DODGE Fort Dodge, IA | 2 | $0 | 2 |
| REX CHEVROLET GMC, LTD ODEBOLT, IA | 2 | $0 | 2 |
| BILLION COMMUNITY, INC. IOWA CITY, IA | 1 | $0 | 1 |
| GLENDENNING MOTOR CO. INC. Mount Ayr, IA | 1 | $0 | 1 |
| 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 |
| EDWARDS CHEVROLET BUICK GMC Council Bluffs, IA | 71 | +$282 | 64 |
| MIKE MOLSTEAD CHEVROLET, GMC Charles City, IA | 10 | +$919 | 8 |
| RICHARDSON BUICK-CADILLAC-GMC TRUCK Dubuque, IA | 5 | +$1,385 | 3 |
| PAT CLEMONS, INC. BOONE, IA | 2 | +$4,455 | 0 |
| COMMUNITY BUICK GMC, INC. Waterloo, IA | 12 | — | 0 |