Like the Chevy Tahoe on which it’s based, the 2007 Escalade features clean body lines, subtle wheel flares, hidden rocker panels, and a front end that resembles the midsize SRX SUV with its large chrome grille and thin vertical headlights. That sparking mug is more than a design cue, it also allows for plenty of air to cool the engine when pulling heavy loads. Behind the scenes, the front end has been designed to impact passenger cars lower and safer, and the frame has been stiffened by nearly 50 percent.