If you’re in the market for General Motor’s 2015 Chevrolet Silverado HD or GMC Sierra HD trucks and don’t want to drop the coin for the Duramax-Allison powertrain combo, then we have some good news: GM has bumped the advertised horsepower rating of the 6.0L V8 in its one-ton heavy duty pickups from 322 hp to 360 hp.
According to USA Today, GM made the decision to bump the horsepower rating after finding that the 3500 HD trucks could pass government noise regulations while the engines were revving higher. One-tonne pickups fall into a category that requires them to meet a “pass by” noise regulation. To control the noise, automakers sometimes have to keep the engine in lower RPM ranges during pass-by testing. The automaker can then only advertise the horsepower the engine is making at the reduced speed, even though the engine is capable of producing more power.
The same rules do not apply for the three-quarter-ton 2500 HD Silverado and Sierra models, as they are in a different category.
“No longer do we need to ‘de-rate’ the full-size pickups, as we have done for over 20 years, because new technology and design make them quiet enough at full power to pass the noise test,” GM powertrain spokesman Tom Read told USA Today. As a result, “we are revising our information for the 2015 model year,” he said.
The heavy-duty Chevrolet Silverado 3500 and GMC Sierra 3500 will go on sale in Q1 of 2014 as 2015 models.
Comments
Why do they continue to flog that old 6.0 quit wasting time and fuel on it and put the 6.2 in everything
Proven reliability
I work as a gm tech in Cold winter climate and can agree with the 6.0 reliability, but would also state that the 6.2 is just as reliable with more power and better fuel economy
I thought the 6L was gone and the 6.2 was taking over, the 6 liter was a very good engine but the mileage sucked , even the older 8.1 should still be used here. big block torque and power.
The reason they are using the 6.0L for now is that the 6.2 hasn’t been modified/certified for CNG quite. It will probably be ready for 2016 MY. Right now the 6.0 the best CNG HD truck engine.
I own 2004 2500hd bought new april 2004.300 hp with 4.10 full floater.this truck has enough power stock . I pull 10.000 lbs up and down hills with never losing speed.but gets about 7 mpg.in 2007 I added cold air intake and superchip programmer.this truck is a powerstroke ford killer .I would rather walk than drive a ford
Mark I wish more people felt like you do! I hate ford! It’s GM or nothing!
Lets bring back a big block (7.0 , 7.4, 8.1) for the heavy duties and a 420 hp 6.6 Duramax turbo diesel with 875 ft/lbs of torque. We’ll then see what Ford and Ram have to say then.
As much as I love those engines, if GM did there would only be room for one of them!
But I really don’t see the need, you can now get a 420/460 6.2 in a 3/4 ton and 1 ton, or the duramax!
The 6.2 has enough power to pull or hall just about anything for 85% of buyers, the rest needs the duramax which can handle anything else!