Cadillac dealer stock climbs to 99 days' supply as gas models pile up

Cadillac dealers closed out September with roughly 99 days' worth of new-car stock, compared with 93 days in August and well above the industry average of 82 days, according to Cox Automotive's monthly inventory report released October 15, 2026. Days' supply estimates how long the cars on lots and in transit would last at the current sales pace, so a higher number usually means more choice on the lot and more room to negotiate.

How Cadillac compares

Across the market, new-vehicle inventory rose 4.5% in September to about 2.8 million units, the first increase after three monthly declines, as sales slowed from August. Cox's brand chart shows a wide spread among luxury makes:

• Leaner than Cadillac: Lexus at 41 days, BMW at 82, Infiniti at 89, Acura at 91 and Porsche at 95.
• Fuller than Cadillac: Genesis at 102 days, Mercedes-Benz at 104, Audi at 114, Land Rover at 117 and Lincoln at 127.
• Inside GM: Chevrolet had 88 days, Cadillac 99, GMC 106 and Buick 124.

Price matters too. Cox found that vehicles listed between $60,000 and $80,000 carried 99 days' supply, and those above $80,000 carried 111 days, against 63 days for cars at $30,000 or less. Cadillac's lineup leans heavily toward those upper brackets, and Cox expects pricier vehicles to keep sitting longer while budget-minded shoppers trade down.

Gas models are piling up

GM Authority, which reported the Cadillac figures on October 22, put the brand's days' supply a year earlier at 79 days. Its own analysis found more CT5 and XT5 stock than in previous months and links that to dealers building up supply before both gas models pause production. The current CT5 is scheduled to end production in December 2026, and the current-generation XT5 is in its final model year. GM has said new gas versions of both will follow, but neither successor is due right away, so the cars now on lots are the last ones dealers will get for a while.

EVs moved the other way

Cadillac's electric models tell a different story. Cox's EV Market Monitor, published October 16, estimates that Cadillac sold 4,655 EVs in September, up 21.5% from August and third among EV brands behind Tesla and Rivian, helped by stronger Optiq and Lyriq sales. Cox named Cadillac among the brands whose EV days' supply fell significantly during the month. Across the industry, EV supply dropped to 68 days, ten days below gas and hybrid models, and EV incentives fell to 11% of the transaction price, the lowest share of 2026.