For the 2008 model year, Cadillac introduced updates to the first generation of the STS, demonstrating that their premium sedan could combine sportiness with luxury features.
The revamped STS lineup was officially presented at the 2007 New York International Auto Show. However, the launch was marred by the impending global financial crisis, which significantly impacted consumer purchasing power. Sales plummeted dramatically from 20,000 units in 2007 to fewer than 4,000 by 2001, ultimately leading General Motors to discontinue production of the STS model.
The 2008 Cadillac STS received relatively modest updates. The front design featured angular headlights with stacked high and low beams. The grille underwent subtle changes, gaining additional chrome slats both at the top and bottom, whereas the previous version only had an upper slat. The lower bumper retained its familiar appearance, characterized by a wide horizontal air intake with fog lights and turn signals positioned above.
Despite not being a true sports sedan, the 2008 STS aimed for a more dynamic look. This was achieved through new multi-spoke aluminum wheels and an enhanced aerodynamic package that included revised side sills with chrome accents. The fenders featured vents to release air from the wheel wells, reducing aerodynamic lift. The overall silhouette remained similar to its predecessor, with a geometric greenhouse, raked windshield, sloping rear window, and short, flat decklid. A broad LED third brake light served double duty as a rear lip spoiler, while slim vertical taillights on the rear fascia mirrored the headlight design.
The STS’s interior was a major selling point, offering standard leather upholstery and Zebrano wood trim. Buyers could upgrade to a DVD-based navigation system mounted on the center stack, though even the base model included a powerful Bose audio system. The front seats were separated by a spacious center console with a folding armrest, storage compartment, and gear selector. The generous wheelbase provided ample legroom in the rear, particularly for two passengers, although the center position was somewhat compromised by the transmission tunnel.
Initially, the 2008 Cadillac STS was offered with both V6 and V8 engine options, paired with a six-speed automatic transmission. All-wheel drive was available as an optional extra. The V8 variant, which offered limited performance gains but higher fuel consumption, was discontinued after the 2010 model year due to weak sales.