Power comes from GM's ubiquitous Vortec 4.3-liter V6 truck engine. This overhead-valve 90-degree V6 is tuned for truck work, with torque peaking at 2800 rpm (250 foot-pounds). It is rated at 190 horsepower at 4400 rpm. Redline is just over 5000 rpm.
The engine is mated to GM's 4L60-E 4-speed electronically controlled transmission. The Envoy's transmission has a tow/haul mode, accessed by a button on the shift lever, that reduces shifting when towing a heavy trailer and attunes the performance of the gearbox to the heavier load. The new Auto Trac 2-speed transfer case is standard as well. Modes are selected by dash-mounted buttons, including an Auto 4WD button that is not all-wheel drive, but rather a standby mode that, when rear wheel spin is detected, engages the four-wheel-drive system for as long as needed.
Four wheel disc brakes are standard, as is ABS on all four wheels. Next Page