We just got a much closer look at a prototype for GM's latest Theta-based crossover, and the best evidence still points to this being the Cadillac BRX. Our first sighting of this prototype came from long distance with a very long lens. Now some of this prototype's key design features are more clearly visible

This latest prototype displays many Cadillac cues: first off is a chrome-outlined side-window-profile, an obviously upscale touch that resembles the newest CTS. The prototype also features a side character line that starts high at the C-pillar, and heads downward as it progresses toward the front fender—another signature Cadillac design touch featured prominently on the CTS, STS and XLR (and also on the Provoq concept). The door handles follow the same downward path, just as they do in the second-generation of Cadillac's design pallete. The wheels also feature a seven-spoke design, which is a common Caddy trait, but are found nowhere else in GM's current lineup (which consist of primarily six- and five-spoke designs). Finally, the rear light clusters seem to show a very sharp vertical edge beneath the camouflage that has some resemblance to the Provoq concept's sharp, fin-like tail-light design.

We first spotted this prototype in early November. In mid-December, a new wrinkle was added to the story with reports that GMC would also be getting a Theta spin-off to accompany the Saturn Vue in 2009. And the arrival of Cadillac's Provoq concept—which features several design cues that alternately match, and differ from this prototype — admittedly muddy the waters a bit on this prototype's actual identity. The main difference between the concept and this production model, however, reside in the pillarless side window design, which is most likely not feasible for production. Hence, we would expect a different B-, C-, and D-pillar design for the production BRX—which is what we see in this prototype. Given that, and the other Cadillac cues that appear to be in play, we think this is our best look yet at Cadillac's new BRX crossover.

One of our eagle-eyed compatriots spotted this all-new crossover during some high-altitude tests and managed to get a few photos before it got away. The BRX had been pegged by industry sources as a smaller, more economical replacement for Cadillac's slow-selling SRX, utilizing a long-wheelbase variation on the Theta II platform that underpins the new Saturn Vue. The size and packaging of this latest prototype, seen testing along side a Saturn Vue as they high-tailed it to safety, appears to support those initial reports.

This BRX prototype is thoroughly disguised, but its smart size and solid stance are clearly visible. A sharp midsection character line can be seen plunging downward from the C-pillar, toward the front front fender, hinting at some possible CTS overtones. The tester was also sporting some seven-spoked wheels that closely resemble the seven-spokers on Cadillac's current Escalade. An interesting side- window-line angles back sharply at the C-pillar, with a slight kink at the waistline.

The BRX is also expected to be shared with Saab (on a 9-4X), and the revised platform may also spawn a Buick variant as well. Engine options are expected to include both the 2.8- and 3.6-liter HF V6s, while a diesel will also be offered in Europe. The new CUV, perhaps available as early as next Fall, will be available in front- and all-wheel-drive configurations.