The Good: The 2007 Cadillac Escalade EXT boasts a plentitude of tech features, including GPS navigation and an advanced audio management system. The Bad: Aside from being a flagship for excess, the 6.2-liter Cadillac EXT is about as impractical and inefficient a passenger car as one can buy off the lot. The Bottom Line: At $60K, this pimped-out pickup truck is more likely to be found on Rodeo Drive than driving to a rodeo. 2007 Cadillac Escalade EXTFifty years from now, cultural historians trying to understand the twilight years of the gas-guzzling SUV will ask themselves a series of questions: What were auto companies thinking when they created enormous cars with enormous engines that were destined for a life of traffic jams? What was the target customer-segment for these beasts of the road that were seemingly designed without the slightest regard for prevailing environmental or geopolitical circumstances? If these historians had to choose one vehicle as a typical case study in this endeavor, they could not start with a more suitable candidate than the 2007 Cadillac Escalade EXT. Pickup trucks have migrated from being utilitarian vehicles to being passenger cars: the majority of Toyota Tundras and Ford F150s we see on the roads are used for nothing more strenuous than the odd trip to The Home Depot. But the EXT is a particularly egregious example of excess. With all-wheel drive and a monstrous 6.2-liter engine, the EXT could theoretically be used to haul around stacks of 50-gallon drums or tow manual log splitters. For outdoorsy types, there's even the option of an "open-air driving experience" with the release of the midgate panel behind the rear seats. But with a leather- and wood-trimmed interior, a bevy of multimedia cabin features, and enough chrome to make you squint, the EXT declares its true comfort-focused mission. High-tech from high-up Climbing into the driver's seat of the EXT, the first thing you notice is how high you sit above the rest of the road-going public. Visibility is good in all directions thanks to the EXT's tall stance and its pickup-truck design incorporating a removable glass rear windscreen. Our EXT came with the Information Package, which equipped it with an integrated navigational system and CD\/DVD player. Like the 2006 Cadillac STS-V we reviewed recently, the EXT features a three-way tilting, in-dash LCD screen for navigation and audio control. Cadillac's navigational systems have generally impressed us to date, and the unit in the 2007 Escalade EXT proved to be no exception. We found the interface easy to program, with the option to enter destinations by an address, a cross street, or a phone number. The Points of Interest (POI) database was well stocked--over 50 restaurant categories were listed, for example--and easy to navigate because of the integration of one-touch scrolling, which enabled us to get through long menus without having to tap the screen repeatedly. The scroll feature is also available to negotiate the bright onscreen map when manually programming a destination using the movable crosshair. The EXT's navigational system does not incorporate text-to-voice technology to read out street names, but the voice guidance is conversational, natural, and among the least robotic we've heard. The scrolling function enables users to program destinations on the map with ease.One feature that particularly impressed us was the intuitive means of adding a stopover on the way to a destination. With minimum effort, we were able to enter a waypoint into our journey without any major disruption of the original route--something that we were not able to do so easily with the navigational system in the 2007 Lexus LS 460L that we took to the 2007 Los Angeles Auto Show last week. Another couple of features that we like on the EXT's navigational system are the Turn List and Route Preview functions. Turn List enables drivers to see a list of turn-by-turn text directions and to select a preference to avoid certain roads or turns before even setting out. Route Preview is a related function that we first saw in our review of the Eclipse AVN6600 head unit: it enables drivers to take a virtual journey to a selected destination by following the progress of the animated crosshair over a map of the chosen route. Advanced music navigation Also ranking high in the tech spectrum is the EXT's audio system. The eight-speaker Bose surround sound system with digital sound processing delivers a rich audio output, but we were more impressed by the interface for navigating digital files. The standard audio system is comprised of a six-disc in-dash CD changer that can read both MP3 and WMA files. The in-dash LCD screen provides full, clear ID3-tag information for homemade digital audio files--a feature that will delight digital audiophiles. Our favorite feature of the EXT's audio system is its music navigational interface for selecting digital audio tracks and folders. To enable the music navigator, users must scan their MP3 or WMA discs--a process that takes up to 10 minutes, depending on the number of files on a disc. This is time well spent, however, as once all of the information is read, users can search their discs by folder, artist, or album, according to their preference. In addition, the music navigator features one-touch scrolling for long lists of music files and is one of the most sophisticated and intuitive music-navigation functions we've seen to date. The music navigator in the 2007 EXT is one of the most advanced audio management systems we've seen.Hands-free calling is available in the Cadillac EXT, and can even be operated using a touch screen keypad. However, phone calls can be made only via GM's OnStar telematics service, and the system has no means of connecting to Bluetooth-enabled phones. Other interior tech features on the 2007 Cadillac Escalade EXT include XM Satellite Radio prewiring (a three-month subscription is included in the sticker price); an optional rear-screen entertainment system with an 8-inch wide-screen display; an optional rear-view camera; optional heated and cooled front seats; and an optional heated steering wheel. As part of its Information Package, our tester car also came with GM's Intellibeam headlight-control system, which uses a forward-looking digital camera mounted to the front of the rearview mirror to enable the car to turn on its high beams at night when no other vehicles are detected on the road ahead. Going down the tech scale, we were less impressed with the dash-mounted analog clock in the EXT. While we do like the presence of an old-fashioned timepiece that allows us to tell the time without digging around in touch screen menus (a la the 2007 Audi Q7), the clocks in both the Escalade EXT and the 2007 Cadillac Escalade fall short in aesthetic design and function. The EXT clock shows only the numerals "9" and "3" on the face, and it's set at such an angle that glare makes it almost unreadable even when not in direct sunlight. Off the EPA charts At 222 inches in length, the 2007 Cadillac Escalade EXT is a huge vehicle, and the few customers who buy it to use as a utility vehicle will be able to take advantage of more than 100 cubic feet of cargo space when the midgate is open. The towing capacity of 7,600 pounds is impressive, but not in the league of the 2007 Toyota Tundra, which will be able to haul more than 10,000 pounds. The EXT comes with the same aluminum 6.2-liter Vortec V-8 engine that we saw in the regular 2007 Escalade. This plant makes 408 horsepower and drives all four wheels via a six-speed automatic transmission. Although the EXT comes with road-sensing suspension, the ride around town is a clumsy, lunging one, with the EXT's huge, 6,013-pound bulk slow to respond to steering inputs. The overcapacity of the EXT's engine is most apparent during urban driving, when the huge V-8 takes an age to respond to throttle inputs and growl its way up to speed. When cruising on the freeway, the V-8 chugs along at around 2,000rpm, making for a smoother ride. For the few who fold up the rear seats and make use of the EXT's 8-foot pickup bed, there is 100 cubic feet of storage space in the back.Due to its immense weight, the EPA does not list fuel-economy figures for the Cadillac EXT. Our recorded consumption after 600 miles of freeway-heavy driving was 14.3mpg, which, surprisingly, is better than both the 2007 GMC Yukon Denali, and the 2007 Cadillac Escalade, although that is nothing to boast about. Occupants of the 2007 Cadillac Escalade EXT are pretty safe in their bling fortress. The EXT scores a full five-star safety rating for frontal and side impact, as well as a four-star rating for rollover safety. Dual frontal airbags with front-passenger occupant-sensing system are standard features, as are head curtain side airbags. The 2007 Escalade EXT also comes with GM's StabiliTrak, which corrects the vehicle's path through steering and braking inputs if sensors detect a difference between the direction of steering and the actual turning angle. Other standard safety equipment includes ultrasonic rear park assist, a tire-pressure monitor, rain-sensing wipers, and a one-year subscription to GM's OnStar Safe and Sound plan. A rearview camera comes as part of the EXT's Information Package.Our tester 2007 Cadillac Escalade EXT came with four major options: the $2,495 Information Package comprising the navigational system, the rearview camera, and Intellibeam; the $625 Climate package, which added heated and cooled front seats and a heated steering wheel; a power sunroof for $995; and 18-inch chrome aluminum wheels for $795. With a base price of $53,335, plus an $875 destination charge, our EXT review car came with a price tag of $59,120. The 2007 Cadillac Escalade EXT doesn't have many competitors in the auto marketplace: the Chevrolet Avalanche and the Honda Ridgeline at least put up some argument for being utility vehicles, whereas the Caddy struggles to come across as anything but sheer vehicular excess for its own sake. We hope that GM holds at least one of these EXTs back to show future generations how wastefully indulgent this era of gas-hog SUVs really is.