58 Articles
Ford turns down Heavy Duty tug of war challenge with GM

Well this is just too bad. As you may recall, Pickuptrucks.com was chatting with Tom Stephens, GM's vice chairman of global product operations, about GM's new heavy duty pickup trucks. Suddenly Stephens said something quite interesting:

GM challenges Ford to heavy-duty pickup tug of war

Pickuptrucks.com sat down with Tom Stephens, General Motors' vice chairman of global product operations at the Detroit Auto Show, and during the course of the conversation, Stephens began espousing the virtues of the General's new Duramax diesel, due to be fitted to the 2011 Chevrolet and GMC Heavy Duty pickups.

REPORT: Isuzu proposes new HD diesel engine for GM?

We're not entirely sure what to make of reports regarding Isuzu's tie-up with General Motors for diesel engines that seem to conflict with one another, but here we go anyway. According to Bloomberg, Isuzu is considering whether it should end its joint venture with The General for the production of large-displacement Duramax diesel engines.

REPORT: Isuzu proposes new HD diesel engine for GM?

We're not entirely sure what to make of reports regarding Isuzu's tie-up with General Motors for diesel engines that seem to conflict with one another, but here we go anyway. According to Bloomberg, Isuzu is considering whether it should end its joint venture with The General for the production of large-displacement Duramax diesel engines.

SEMA 2009: Wicked Chevelle isn't as fuelish as it seems

1970 Duramax Chevrolet Chevelle custom - Click above for high-res image gallery

SEMA 2009: Badass Chevy Chevelle isn't as fuelish as it seems

1970 Duramax Chevrolet Chevelle custom - Click above for high-res image gallery

REPORT: GM halting Duramax production for 10 weeks

The revamped 6.6-liter Duramax V8 engine will go into production in April 2010 and the current Duramax, which doesn't meet emissions requirements that go into effect January 1, 2010, will cease production the day before the new year begins. In the interim, GM will be retooling the factory and won't be producing any of the engines to go in the Chevy Silverado and GMC Sierra.

General Motors 4.5L Duramax V8 could be revived when the conditions are right

Earlier this year, as General Motors was slashing spending on programs in a desperate and ultimately unsuccessful attempt to stave off bankruptcy, one of the victims was the new new 4.5-liter Duramax diesel V8. The engine, which was intended to start production in early 2010 for use in GM's full-size light duty trucks, was shelved as gasoline prices dropped and sales were plummeting across the board. The program was never officially pronounced dead, merely on indefinite hold. At this point the e

GM light duty 4.5L diesel V8 on indefinite hold, probably dead

People who were hoping to get a diesel-powered light duty truck in the next few years are now pretty much out of luck. In a disappointing but thoroughly unsurprising move, General Motors has confirmed that its highly anticipated 4.5-liter Duramax diesel is on indefinite hold. Employees at GM's Tonawanda, NY engine plant that had been scheduled to build the engine have been informed that the new engine has been shelved. GM Powertrain spokeswoman Susan Garavaglia told Mike Levine at PickupTrucks.c

Well done, GM: new Duramax diesel engine is lighter, smaller

We've written here several times about the brilliant packaging job that General Motors has done with its new upcoming 4.5L Duramax diesel V8. Beyond the basic packaging, the engineers have done a lot of fascinating work on the internals to reduce weight and improve efficiency as well. The main bearing journals that are cast into the bottom of the block are manufactured with a fracture splitting process that makes them stronger and lighter. The block itself also uses less compacted graphite iron,

GM's Duramax diesel goes under the knife, loses weight

GM's new 4.5L Duramax diesel engine promises a 25% increase in fuel economy while providing 310 hp and 525 lb-ft. The new oil-burning powerplant also needs to pass 50 state emissions while providing the efficiency customers are demanding. GM has already provided some details of the Duramax 4.5L, including that the new diesel is roughly the same size as the General's compact small block V8, which means it can fit in more than just trucks and SUVs. The 4.5-liter also reduces the parts count with i

Could the Cadillac CTS get GM's new 4.5L diesel V8?

Ever since General Motors announced a new 2.9L turbodiesel V6 for the European-spec Cadillac CTS there has been speculation about whether it would ever be introduced in the U.S. market. Last December, Cadillac General Manager told ABG that the company was evaluating the new engine for U.S. market. That may or may not still be a possibility although GM definitely seems to be cool on diesel in the U.S. these days. Vice Chairman Bob Lutz has always been quick to throw cold water on the idea because

GM powertrain plans: high-tech, low weight

Click above for more early images of the production Chevy Volt

Looks can deceive: 6.6L Duramax-powered Buick GNX clone

The car you see here is not a GNX. Hell, it's not even a Buick. You'd be forgiven if you thought it was, though, and it does sport a turbocharger underhood. David Morad was so enamored with the 6.6L LB7 Duramax diesel in his truck that he wanted to put it into something lighter and more fun. He decided to build a Grand National around the engine, and started buying up whatever applicable Buick body parts he could find -- right down to legit GNX dash plates. Next, he bought an '82 Buick Regal die

VIDEO: GM Diesel engineering director describes the new Duramax 4.5L V8

About a year from now, General Motors will face a very interesting conundrum. The company will already be producing a version of its full-size pick-up trucks with a Two-Mode hybrid system. For the 2010 model year, another new engine will be added, a 4.5L diesel V8 that meets Tier 2 Bin 5 emissions requirements in all 50 states. The hybrid system gives a 30 percent boost in fuel efficiency over a 5.3L V8. The diesel should also offer a similar boost. The hybrid is a very expensive system to build

More information on GM's new light duty diesel V-8

We gave a pretty detailed write-up last summer on GM's new light-duty diesel V-8 that will premiere in 2009. The new engine was specifically designed to fit within the same package dimensions as the long-running small-block V-8. As such, the diesel can potentially be installed in any GM vehicle that currently carries the V-8. GM has announced that the new 4.5L engine will have output of 310hp and 520lb-ft of torque. The Duramax 4500 will also provided a 25 percent reduction in fuel consumption c

GM bets $69 million on diesel plant in Ohio

New emissions standards in 2010 will make things too stringent for GM's Duramax diesel, in its current form, to make the grade. To help its prize student pass the looming tests, GM is investing $69 million in its DMAX plant (a joint venture diesel engine factory in Moraine, Ohio) for plant renovations and new machinery and tooling.

Spied HUMMER H2T actually a diesel?

At least one person has lamented the lack of diesel options for the H2 SUT. In case that's you, PickupTruck.Com speculates that the coming H2T (the new name for the H2 SUT, to bring it in line with H3T naming) could be offered with a diesel. The clue is in the big-bore tailpipe seen in the spy shots, which could indicate the use of a 'venturi-effect' tailpipe. It's the kind of setup GM uses on its Silverado and Sierra HDs to keep the oil burners from spewing black smoke.

SEMA 2007: Chevy Silverado HD Crew Z71 "Big Red"

Click the image above for more "Big Red"

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