Vehicles equipped with head curtain side air bags feature an integral rollover protection sensing system that helps protect occupants in a rollover event by triggering both the side curtain air bags and safety belt pretensioners. The rollover-sensing module, located on the center tunnel under the rear seat, uses a complex algorithm based on lateral and vertical accelerations, roll rate and vehicle speed to determine whether to deploy the safety systems.

Additional 2007 GMC Envoy safety features include:

- Three-point safety belts in all seating positions
- Dual-stage frontal air bags
- GM's Passenger Sensing System (PSS)
- Push-pull power window switches
- LATCH (Lower Anchors and Tethers for CHildren) system for child safety seats
- Enhanced passenger seat belt reminder system
- Low-drag brakes

All 2007 Envoy models feature OnStar Generation 7, which includes Advanced Automatic Crash Notification (AACN) system, making crash data available to 911 centers to potentially dispatch the appropriate life-saving personnel and equipment to crash scenes faster. ACCN does not require air bag deployment.


2007 GMC Envoy / Envoy Denali Powertrains

Powering 2007 Envoy Denali is the robust, all-aluminum Vortec 5.3L V-8. It delivers 300 horsepower (224 kW) and 330 lb.-ft. of torque (447 Nm)**, for excellent step-off acceleration and a broad torque range. The result is segment-leading standard towing capability - up to 6,600 pounds (2,994 kg) in 2WD Envoy Denali models.

The Vortec 5.3L engine is equipped with GM's fuel-saving Active Fuel Management technology, which enables fuel economy gains of up to 5 percent in certain light-load driving conditions by reducing the number of cylinders engaged in the combustion process. A sophisticated, next-generation engine controller determines when to deactivate cylinders, allowing the engine to maintain vehicle speed in lighter-load conditions - such as highway cruising. When the cylinders are deactivated, the engine effectively operates as a V-4, with alternate cylinders on each cylinder bank disabled. The engine seamlessly returns to V-8 mode the instant the controller determines the vehicle speed or load requires additional power.

The standard engine on 2007 GMC Envoy is the award-winning Vortec 4.2L 24-valve, dual-overhead-cam inline six-cylinder engine. It is rated at 291 horsepower (217 kW) and 277 lb-ft. (375 Nm) of torque* and provides the muscular yet smooth performance of many V-8 engines with the fuel efficiency of a six-cylinder.

Both engines feature new regulated voltage control, which enhances fuel economy by reducing the load on the engine required to drive the alternator in certain conditions. The engines are coupled to the rugged Hydra-Matic 4L60-E electronically controlled four-speed transmission. All GMC Envoy models are available in two-wheel drive and with Autotrac four-wheel drive.

*SAE certified. A new voluntary power and torque certification procedure developed by the SAE Engine Test Code committee was approved March 31, 2005 . This procedure (J2723) ensures fair, accurate ratings for horsepower and torque by allowing manufacturers to certify their engines through third-party witness testing. GM was the first auto manufacturer to begin using this procedure and expects to use it for all newly rated engines in the future.

** Preliminary, pending SAE certification.


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