John Gaydash, GM Fleet and Commercial marketing director stated, "These hybrid pickups will save more fuel than gasoline-powered pickup trucks, with no compromise in
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| In the hybrid Sierra, GM replaces the conventional electric starter and alternator with a compact electric motor. (Photo: General Motors of Canada) |
In a nutshell, GM replaces the conventional electric starter and alternator with a compact electric motor, itself integrated between the engine and transmission in a patented, space-efficient manner. Unfortunately there isn't any added torque provided by the electric motor to help out when towing heavy loads, but nevertheless the electric motor does supply power to the transmission that in-turn delivers torque smoothing to the drivetrain. Up to 14,000 watts of continuous electric power is generated.
If you're familiar with a V8's usual gurgling exhaust note, or the chugging of an even louder diesel, you'll
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| Where the GM system differs from Toyota's full-hybrid technology, is that it uses a partial- or mild-hybrid system. (Photo: General Motors of Canada) |
Where the GM system differs from Toyota's full-hybrid technology, also adapted by Ford and soon Nissan, is that it uses what some experts consider a less sophisticated partial- or mild-hybrid system - similar to that used by Honda in its Insight, Civic Hybrid and soon to be released Accord Hybrid. The jury is out as to which is better over the long haul, but partial systems are not considered quite as efficient as full-hybrid systems, being that the gasoline engine needs to be running while under way - unless coasting. Full-hybrid systems can drive on electric power alone, until the batteries need to be recharged at which time the gasoline engine restarts.