On 24 August 2021, Cadillac announced its intention to compete in IMSA's new GTP class and the WEC Hypercar class from 2023 using an LMDh-compliant design. Dallara was confirmed as the chassis supplier on the same day, alongside initial team partners Action Express Racing and Chip Ganassi Racing. Cadillac released renders of the car in June 2022 and confirmed a hybrid powertrain pairing a 5.5-litre naturally aspirated 90° V8 — among the largest engines in the LMDh category — with standardised hybrid components from Williams Advanced Engineering, Bosch, and Xtrac. The first shakedown occurred in July 2022, followed by extensive testing at Sebring International Raceway and Road Atlanta covering nearly 19,312 km before the competitive debut. The exterior was designed by Chris Mikalauskas, with Aaron Pfeifer serving as vehicle technical lead and Adam Trojanek as lead propulsion engineer. The definitive specification produces 500 kW, weighs 1,030 kg, and uses a rear-mounted 50 kW Bosch spec MGU and an Xtrac P1359 seven-speed sequential gearbox. Braking is handled by Brembo carbon-carbon callipers, and tyres are Michelin on OZ one-piece forged alloys.
Cadillac ran three cars in the IMSA season opener at the 24 Hours of Daytona — numbers 01 and 02 under Chip Ganassi Racing and number 31 under Action Express Racing as Whelen Engineering Racing. The #01 finished third overall on debut. The V-Series.R took its first victory at the 2023 12 Hours of Sebring courtesy of Action Express Racing despite an early collision with an LMP3 car. The team added further wins at the Motul Course de Monterey and a crucial podium at Petit Le Mans, enabling Cadillac and Action Express Racing to claim all three IMSA GTP titles after a season-long fight with Acura. In WEC, a single car ran full-time under number 2 with Chip Ganassi Racing; it finished third overall at the 24 Hours of Le Mans — Cadillac's first appearance in that race since 2002 with the Northstar LMP — and ended the manufacturers' championship fourth. Two additional V-Series.Rs attended Spa and Le Mans in preparation roles; the Spa car, carrying number 3, retired after Renger van der Zande suffered a heavy high-speed crash at Raidillon following a suspected power steering failure.
Action Express Racing's #31 set a track record pole at the 2024 24 Hours of Daytona through Pipo Derani and spent much of the race at the front before finishing 2.112 seconds behind the race-winning Porsche 963. Chip Ganassi Racing's #01 secured the most noteworthy result of the IMSA season with a victory at Petit Le Mans. In total, Cadillac's IMSA programme accumulated eight podiums, two wins, and four pole positions across the year. The WEC campaign was largely uneventful; a technical breach brought a disqualification from the opening Qatar round, and the season included a high-speed crash before a pole position at Fuji offered a late highlight.
Chip Ganassi Racing departed for 2025 and were replaced by Wayne Taylor Racing in IMSA and Jota Sport — competing as Cadillac Hertz Team Jota — in the WEC. At the 2025 24 Hours of Le Mans, Jota locked out the front row in Hyperpole qualifying through Alex Lynn (#12) and Earl Bamber (#38), giving Cadillac its first-ever pole at Le Mans. Lynn's #12 car took victory at the 2025 6 Hours of São Paulo, with the #38 finishing second to give Cadillac a 1–2 finish and its maiden WEC victory. Action Express Racing's #31 won the 2025 IMSA Battle on the Bricks and Petit Le Mans, finishing second in the IMSA GTP standings.
Action Express Racing entered 2026 with Frederik Vesti joining Jack Aitken and Earl Bamber. The #31 scored a race win at the 2026 Detroit Sports Car Classic — the last listed result in the corpus. In WEC, Team Jota continued the programme with the #12 of Alex Lynn.
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