| Teams for 2003 Aaron's 312 |
|---|
| Car | Team | Driver | Mfg |
|---|---|---|---|
| 00 | Gene Haas | Jason Leffler |  |
| 0 | JD Motorsports | Gus Wasson | |
| 1 | James Finch | David Stremme |  |
| 2 | Richard Childress | Ron Hornaday, Jr. | |
| 4 | Biagi DenBeste Racing | Mike Wallace | |
| 5 | Rick Hendrick | Brian Vickers | |
| 6 | Tommy Baldwin Jr. | Paul Wolfe | |
| 7 | Evans Motorsports | Greg Biffle | |
| 8 | Chance 2 Motorsports | Hank Parker, Jr. | |
| 9 | Dayne Miller | Morgan Shepherd |  |
| 10 | Greg Pollex | Scott Riggs | |
| 12 | FitzBradshaw Racing | Tim Fedewa | |
| 16 | Wayne Day | Larry Gunselman | |
| 17 | John Reiser | Matt Kenseth | |
| 18 | Joe Gibbs | Coy Gibbs | |
| 19 | Todd Braun | Casey Mears | |
| 20 | Joe Gibbs | Mike Bliss | |
| 21 | Richard Childress | Kevin Harvick | |
| 22 | Bost Motorsports | Kevin Conway | |
| 23 | Bill Davis | Scott Wimmer | |
| 25 | Ed Rensi | Bobby Hamilton, Jr. | |
| 26 | Dave Carroll | Chad Blount | |
| 27 | Brewco Motorsports | Chase Montgomery |  |
| 31 | Ted Marsh | Dave Blaney | |
| 37 | Brewco Motorsports | David Green | |
| 38 | Akins Motorsports | Kasey Kahne | |
| 43 | Mike Curb Racing | Johnny Sauter | |
| 44 | GIC-Mixon Motorsports | Mike Harmon | |
| 46 | Bill Lewis | Ashton Lewis | |
| 48 | George Debidart | Todd Bodine | |
| 56 | Mac Hill Motorsports | Tim Sauter | |
| 57 | Greg Pollex | Jason Keller | |
| 59 | ST Motorsports | Stacy Compton | |
| 67 | Jason Schuler | Josh Richeson | |
| 71 | Jerry Young | Ron Young | |
| 73 | Daryl Spoerl | Jason Schuler | |
| 77 | Joseph Reilly | Brad Teague | |
| 82 | FitzBradshaw Racing | Casey Atwood | |
| 87 | Rick Hendrick | Kyle Busch | |
| 89 | John Reiser | Wally Dallenbach, Jr. | |
| 99 | Michael Waltrip | Michael Waltrip | |
