In the Chevrolet Motor Division's trucking business, if two doors are good, four doors must be twice as good.

That, and bigger is better, are the buzz words for 1995.

They describe the newest full-sized sport-utility vehicle from the General Motors Corp. division, the 1995 four-door Chevrolet Tahoe. It was introduced at the recent North American International Auto Show in Detroit.

Available about March, the Tahoe will be relinquishing its former K-Blazer name to its compact "kissin' cousin," the Chevy S-Blazer. Slotted to fit between the Blazer and the big Chevy Suburban, the Tahoe four-door will be assuming the mantle of a midsized Suburban.

Actually, the new sport/utility is a five-door, considering that there's a rear cargo door. There's also a two-door/three-door Tahoe sport/utility, but this vehicle is six inches shorter in wheelbase and 10 inches shorter in overall length. The four-door is by far the big brother of the Tahoe line.

With the Tahoe four-door positioned between the compact Blazer and the Suburban, its design was developed specifically for the four-door vehicle.

Rather than creating a unit based on a shortened Suburban chassis, or a stretched two- door Tahoe, the frame and suspension componentry were specifically developed for a four-door Tahoe.

Also, to utilize more of the vehicle's interior cargo space, the spare tire is mounted under the body rather than in the cargo area as is in the two-door Tahoe.

The result is 122.5 cubic feet of interior cargo space.

The "in thing" for trucks today is to make them drive like a car, with all the comforts of home.

Well, 4,980 pounds of Tahoe -- 5,377 pounds in four-wheel-drive form -- can be pretty formidable on the highway. Yet with its variable-ratio power steering and four-speed automatic transmission, there shouldn't be anything easier to drive.

For the four-door, the automatic is all that's offered. The two-door Tahoe's five- speed manual isn't available.

But what is available is an all-new instrument panel, plush new door panels and contoured seats. All the controls are GM-oriented, so a first-time driver can slide into one of these and feel fairly at home.

All sorts of information is available from a standard gauge package that includes a tachometer and a speedometer that is the main, centrally located, instrument. And may the good Lord bless the designers of the instrument panel, because they included an oil-pressure gauge, along with temperature, voltmeter and mileage instrumentation.

The Tahoe four-door is a five or six-passenger sport-utility, depending on whether it has standard front bucket seats or a standard 60/40 split bench front seat. The 60 percent, of course, is on the passenger side so it can accommodate a middle occupant.

Obviously, the inclusion of two rear doors makes access to the back seats more convenient. An option to make it even easier is running boards.

While the Tahoe has a fairly low doorsill and floor pan, there's still a ne ed for ground clearance for off-road use. So getting into the sport-utility can mean a pretty good step up, especially inconvenient for women wearing a skirt.

There's not a great deal of decision-making involved for the powerplant. The only engine offered for the new four-door model is Chevy's tried and trusted 350-cubic-inch (5.7-liter) V8.

A motor that's virtually synonymous with the Chevrolet name, the Tahoe's 350 is designed for medium horsepower and a ton of torque.

The power rating is 200 horsepower, but the torque is at the stump-pulling level, 310 foot- pounds. When the V8 gets chugging, it can tow up to 7,000 pounds, or 3 1/2 tons.

To make things even more interesting, the engine is mated to an automatic that now uses Dexron III, a transmission fluid that Chevrolet says never needs replacing under normal service.

A side issue here is that the smaller Tahoe two-door hasa 395-cubic-inch (6.5-liter) turbo-diesel V8 available that is rated at 180 horsepower and 360 foot -pounds of torque. But Chevy has decided not to offer this motor in its four-door version.

Today's sport-utility vehicle is as much a suburban commuter vehicle as it is a workhorse. Consequently, a splash of luxury and ease of ride were dominant parameters in designing the vehicle.

Custom cloth seats set the mood for overall comfort. Rear-seat air ducts that are available only in the four-door assure consistent climate control throughout the cabin.

A standard convenience feature with bucket seats includes a center console that converts to a mobile workstation with a pivoting writing surface, map pocket, cassette tape storage, removable coin holder, cup holders and a latched rear storage drawer.

So just move right in and make yourself at home. The Tahoe four-door is designed to bring trucking elegance to the sport-utility market. It also offers all the utility of a full-sized vehicle.

1995 Chevrolet Tahoe LS Base price: Not available.Type: Front engine, rear-wheel drive, five/six- passenger, full-size sport utility.Engine: 5.7-liters, OHV V-8, 16 valves, fuel injected, 200-horsepower, 310 foot-pounds of torque.Transmission: Four-speed automatic.Wheelbase: 117.5 inches.Length: 199.1 inches.Width: 76.4 inches.Height: 70.2 inches.Curb weight: 4,980 pounds.Maximum gross vehicle weight rating: 6,300 pounds.Maximum payload: 1,532 pounds.Towing capacity: 7,000 pounds.Options: Premium stereo, air conditioning, convenience group, remote keyless entry, uplevel trim package, four-wheel drive, rear cargo net, all-season radial tires, running boards.