Since GM introduced a commercial parallel hybrid propulsion system for mass transit bus fleets in 2003, and the world's first full-size hybrid pickups in 2004, we follow any news about rear-wheel drive hybrids very closely.

So imagine our surprise when we read press reports recently (subsequently corrected) that Toyota was introducing "the world's first commercially mass produced hybrid system particularly designed for rear-wheel drive vehicles." Further investigation revealed that Toyota told the press at a preview in Hawaii that their new L110 hybrid transmission in the new Lexus GS450h hybrid sedan is the "world's first longitudinal hybrid transmission".

Now, I'm sure the Lexus hybrid is a fine car. And Toyota's PR department never misses a chance to tout its hybrid vehicles, which is fine - that's their job.

But as the head of GM Powertrain, I'm absolutely certain that GM has already developed two hybridized longitudinal transmissions, and we're nearing completion of a third system. So I'd respectfully suggest that Toyota recheck the calendar as GM's been in the market for quite a while now.

GM has produced over 4,000 Chevrolet Silverado and GMC Sierra hybrid pickups - roughly twice the number Toyota has set as a sales target for the Lexus GS450h in the U.S. Our hybrid pickup trucks provide the highest estimated city fuel economy of any full-size pickup on the road today, and they deliver this benefit without any sacrifice in performance or towing and hauling capability.

As for buses, there are more than 420 GM hybrid powered buses in 30 cities in the U.S. and Canada. These buses deliver significantly better fuel economy and dramatically lower emissions - up to 90 percent - over conventional diesel buses.

We're not done developing rear-wheel drive hybrid systems, either. In 2007, GM will introduce 2-mode hybrids in two of GM's most popular full-size SUVs, the Chevrolet Tahoe and the GMC Yukon. And in 2008, we'll make it available on Silverado and Sierra Crew Cab models and the Cadillac Escalade.

Hybrids are a key element of GM's product and technology strategy, which is why we're introducing hybrid systems on up to 12 models, and targeting higher fuel-consuming vehicles to maximize the environmental benefits of hybrid technology.

So welcome, Toyota, to the rear-wheel drive hybrid club. We're glad you've joined us.

By Tom Stephens.