The 2003 GFS Marketplace 400 was the 23rd of 36 scheduled stock car races of the 2003 NASCAR Winston Cup Series.

[5] The standard track at Michigan International Speedway is a 2 mi (3.2 km) four-turn superspeedway.

[6] Before the race Matt Kenseth led the Drivers' Championship with 3,294 points, ahead of Dale Earnhardt Jr. in second and Jeff Gordon in third.

Jimmie Johnson and Kevin Harvick was fourth and fifth, and Michael Waltrip, Bobby Labonte, Kurt Busch, Ryan Newman and Robby Gordon rounded out the top ten.

Busch, Dale Jarrett, Johnson, Tony Stewart, Terry Labonte rounded out the session's top-ten drivers.

Jason Leffler, Christian Fittipaldi, Jeff Burton, Dave Blaney and Jimmy Spencer rounded out the top ten qualifiers.

[11] Brett Bodine, Carl Long, Rich Bickle and Morgan Shepherd withdrew from the event prior to qualifying.

[14] Jeremy Mayfield's tire blew, damaging his rear fender, and switched to a back-up car.