General Motors executed a stunning championship sweep at Michelin Raceway Road Atlanta during the Motul Petit Le Mans, locking up top honors in both the GTP and GTD Pro classes of the IMSA WeatherTech SportsCar Championship, as Motorsport.com reports. Driven by Cadillac’s clean sweep of the GTP Manufacturer, Team, and Driver titles alongside Chevrolet securing the GTD Pro Manufacturer crown, the American powerhouse put on a clinic. Cadillac didn't even need to take the overall race victory on Saturday; simply starting the endurance showcase locked up the brand's 11th IMSA Manufacturer title and its fifth since 2017.
The success was built on a unified approach. Powered by a collaborative effort combining entries from Cadillac Wayne Taylor Racing—specifically the #10 and #40 cars—alongside Action Express Racing’s #31 Whelen Cadillac V-Series.R, the strategy paid off brilliantly. GM President Mark Reuss praised the execution, noting that both Cadillac and Chevrolet winning manufacturer titles proves the absolute strength of their racing programs.
Eric Warren, Vice President of Global Motorsports Competition for General Motors, pointed directly to the cooperative "Team Cadillac" setup between program partners as the engine behind the GTP success. The consistency has been nothing short of incredible, featuring a podium streak stretching across 10 races starting at Indianapolis last year, interrupted only near the end of Road America.
In the driver standings, Jack Aitken secured his first career IMSA series championship alongside co-drivers Earl Bamber and Frederik Vesti in the #31 Whelen Cadillac. Aitken’s title came on the back of an insane run of consistency that yielded eight consecutive IMSA GTP podiums and nine in his last 11 races dating back to Indianapolis. That same driver title coincided with Action Express Racing capturing its seventh IMSA Team championship—a historic milestone that ties the organization with powerhouse teams Chip Ganassi Racing and Team Penske for the most all-time.
Action Express representative Chris Mitchum reflected on the team's relentless season and the deep partnership with GM dating back to the Grand-Am and DP days. Mitchum emphasized that the single-team approach shared with Wayne Taylor Racing was indispensable, highlighting a fierce racer's mentality where the team hates losing more than it wants to win. He also singled out a phenomenal pit crew and credited long-standing team personnel like team manager Gary Nelson, crew chief Bill Keuler, and shop foreman Brian Hay—all of whom have been together since 2014—for the squad's immense longevity and the chance to fight for an eighth title next year.
Over on the GT side of the garage, Chevrolet secured its 16th manufacturers' title since the factory Corvette Racing program started in 1999. The final hours of the race were properly chaotic for Corvette Racing by Pratt Miller Motorsports, as late-race accidents dropped its two Z06 GT3.Rs to eighth and 12th-place finishes, narrowly denying Tommy Milner and Nicky Catsburg the driver and team championships. Thankfully, customer outfit DragonSpeed picked up the slack by finishing sixth—beating both Ford Racing Mustang GT3s—to help lock down the GTD Pro Manufacturer crown. Warren expressed immense pride in how the Corvette Z06 GT3.R platform has truly come into its own over the last year across both IMSA and WEC.
