UPDATE 3/20/2026: The 2027 Yukon will not be offered with the LT4 supercharged V-8, General Motors has confirmed. The company provided the following statement: "General Motors regularly provides Vehicle Identification Numbering Standard updates. The latest included an inaccurate engine listing for 2027 GMC Yukon. We will be correcting the filing." The original story follows.
Beyond exterior styling and cabin trimmings, the differences between GMC's trucks and SUVs and their Chevrolet counterparts are usually minor. But it appeared the 2027 GMC Yukon was about to receive an exclusive powertrain option drawn from the top of GM's full-size SUV lineup.
In VIN Standards documentation submitted to the federal government, General Motors listed four engine options for the 2027 Yukon — one more than the three available in the Chevy Tahoe and Suburban. All of those larger-lineup SUVs are expected to continue using the L84 5.3-liter V-8, the L87 6.2-liter V-8, and the LZ0 3.0-liter turbodiesel inline-six. The Yukon alone, however, was listed with the LT4 supercharged 6.2-liter V-8 from the Cadillac Escalade-V in the 2027 VIN documentation.
The implication was that GMC was channeling the spirit of its early 1990s performance era — the time of the high-performance Typhoon SUV and the Ferrari-beating Syclone truck. Neither historic name was expected to return, however. The same VIN filing showing the supercharged V-8 also indicated that the existing Elevation, Denali, and AT4 trim levels would carry over to 2027, including the plush Denali Ultimate and AT4 Ultimate variants.
This suggested both Ultimate models could receive access to — or possibly come standard with — the hand-assembled LT4, which produces 682 horsepower in the Escalade-V. We speculated that the Denali Ultimate would gain chassis tuning to sharpen its on-road behavior, while an AT4 Ultimate with this engine could have received off-road-specific upgrades to match.
An LT4-powered Yukon would have almost certainly cost significantly less than the $170,895 Escalade-V while delivering largely comparable performance in a less flamboyant package. The Yukon AT4 Ultimate with this engine could have been positioned as a full-size SUV rival to the Ram 1500 TRX or Ford F-150 Raptor R — either as a straight power upgrade or paired with meaningful hardware additions for off-road capability.
Before GM clarified the error, we were holding out hope for the latter interpretation. As it stands, the LT4-powered Yukon was never more than a VIN filing mistake — but what a mistake it was to dream about for a few days.