The electrical system is powered by an upgraded dual battery system with emergency equipment isolation to meet the unique needs of police. To avoid excessive engine idling, a 760-amp auxiliary battery will allow video systems, department radios, mobile data terminals, emergency lighting and more to operate without running the engine. A new high-output alternator is 47% more powerful than the 2020 model to support the continuous running of electrical equipment.
Fuel economy is improved in the 2021 Tahoe police vehicles through Dynamic Fuel Management. DFM enables the engine to operate in up to 18 different cylinder patterns—with as few as two cylinders—to optimize power delivery and efficiency. The DFM controller calculates 80 times per second how many cylinders are required to meet the driver’s requested torque.
While the Tahoe PPV is offered in two-wheel drive and four-wheel drive configurations, the SSV is exclusively 4WD. For added off-road capability, 4WD models offer a Terrain Mode, which provides performance similar to 4WD Low without the need of a two-speed transfer case.
The Tahoe Special Service Vehicle also offers an available Max Trailering Package with a max-tow rating of 8,200 pounds. This package includes an active, two-speed electronic Autotrac transfer case with push-button controls and an integrated trailer brake controller.
“Tahoe is the most aspirational vehicle in the law enforcement industry,” said Ed Peper, U.S. vice president of GM Fleet. “By listening to the needs of officers from around the country, we have built the best Tahoe ever.”