During the heyday of the muscle car, three digits struck fear into the hearts of challengers who found themselves unlucky enough to sidle up next to a Chevy wearing the badge “427.” The badge is back on the Silverado 427 – a concept vehicle that demonstrates a tangible extension of the new Silverado’s performance parameters.

The Silverado 427 is powered by GM Powertrain’s 7.0-liter LS7, the same Gen IV small-block V-8 that is the center of power in the Corvette Z06 and available as a “crate engine” package from GM Performance Parts. Its cubic-inch displacement is 427. A six-speed manual transmission backs the engine, providing the driver with full control of the vehicle’s substantial capability.

“There’s hardly a more legendary – or menacing, depending on your point of view – moniker in the world of performance than ‘427’,” said John Cafaro, chief designer for full-size trucks. “The Silverado 427 concept delivers on the expectation of that revered badge with performance that equals or surpasses the original.”

More than just a pickup with a more powerful engine, the Silverado 427 is a total performance package, with a lowered suspension that delivers racecar-like reflexes and an exterior styling package that is simultaneously aggressive and understated.

“The regular cab, short box body style of the Silverado 427 was a deliberate choice, because it represents the essence of elemental performance: filling the smallest, nimblest body and chassis with the most powerful engine,” said Cafaro. “Indeed, all elements of this concept are simple and minimalist; it is equipped only with the components necessary to convey its performance.”

This means a traditional rear-drive layout for the Silverado 427. There is no all-wheel drive or electronic traction enhancers. Luxury features also were kept to a minimum, as the vehicle’s focus was kept squarely on performance.

Drivetrain details

Fitting the LS7 engine into the Silverado’s engine bay was relatively simple, because it is based on the same Gen IV small-block V-8 family as the Silverado’s regular production V-8 engines – and is available as a “crate engine” package from GM Performance Parts. A custom-fabricated air intake system was designed for the Silverado 427, adding not only a necessary air path for the engine but also some underhood distinction.

2007 Chevrolet Silverado 427
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The LS7 is rated at 505 horsepower and 470 lb.-ft. of torque, and is built with lightweight reciprocating assembly components and other design features that have their roots in the Corvette racing program. In fact, the LS7 uses a racing-style dry sump oiling system that ensures optimal engine oiling during all driving and cornering maneuvers. Engineers had to make room under the Silverado’s hood for the LS7’s external oil supply tank.

The Silverado 427’s LS7 engine is backed by a Tremec heavy-duty six-speed manual transmission, which transfers torque to GM’s automatic locking rear axle. It’s fitted with 3.73 gears, which multiplies the torque of the LS7 to provide muscle car-challenging acceleration. The six-speed transmission has a steep, 3.01:1 first gear, which contributes to a tremendous performance at launch, while two overdrive gears balance the Silverado 427’s performance with fuel economy that first-generation 427 drivers could only dream of.

Complementing the drivetrain is a set of 22 x 10-inch five-spoke aluminum wheels mounted to wide Pirelli Scorpion 305/40ZR22 performance tires, which do their best to maintain adherence to the Tarmac as the LS7’s revs climb. The tires are the contact points for a performance-tuned suspension that used Ground Force custom front and rear lowering springs, front struts and rear shocks. The lowered suspension helps the Silverado 427 corner flatter and with more precision, while also giving the vehicle a “just right” performance stance. A set of Baer disc brakes, with six-piston calipers and 16-inch-diameter rotors, provides the stopping force for the vehicle.

Powerful design – inside and out

Complementing the Silverado 427’s performance is a thoughtfully designed exterior that deftly incorporates high-performance styling cues in a restrained manner, giving the truck a look that is unmistakably aggressive yet respectful of its minimalist performance ethic. The design incorporates numerous changes compared with production Silverado models, including new front and rear fascias, hood, cowl, tailgate, tonneau and body-side cladding.

Many of the design elements are subtle, such as the tight body cladding – which incorporate polished billet side-exit exhaust outlets – and shaved door handles. Other elements immediately draw the eye; the most prominent of these being the dramatic hood scoop. It was designed as a contemporary interpretation of the famous Corvette “Stinger” hood scoop, which identified 427-powered Corvettes of the mid-1960s. And like the original Stinger scoop, the Silverado 427’s hood scoop is emblazoned with the “427” numbers and a complementing accent color over the Laser Blue exterior color.

The grille, fascias and tailgate all are designed with a performance-oriented, streamlined appearance. The doors are opened via an ITW Active Touch.

Inside, the Silverado 427 is outfitted with Corvette seats that have been covered with custom Soliel Keisel leather upholstery and equipped with three-point racing-style harnesses. The perforated, black leather seat coverings have blue inserts. Between the seats is a custom center console that incorporates the shifter and houses a set of billet-face instruments. Other details include a revised instrument panel, with billet inserts and trim.

What do you think?
Show Comments


  (6023) posted on 03.12.2008


badestofthebad  (608) posted on 11.19.2007

sources say this truck goes from 0-60 in jus 5.2 secs

badestofthebad  (1) posted on 08.3.2007

haha dose srt lovers talkin bout nitrous hahah yup well dodge needs it more dan chevy hahahah we jus need motor

badestofthebad  (1) posted on 05.29.2007

They are coming out with this thing i dont know y guys keep saying they MIGHT come out with it. Its already on the dealership lots out here in delaware. I havent seen anyone with it but i might soon. Of this thing theres a few things i wanna know and hear. 1 the engine, 2 exhaust stock and exaust with duals and 3 the quarter mile times. This thing is badass.

badestofthebad  (608) posted on 03.17.2007

ladies and gentleman the new and curent fastest truck in the world, looks like chevy has the title now dodge, am sorry it had to happen but hey it was gud with the srt-10 while it lasted.

badestofthebad  (1) posted on 01.19.2007

They better do something as my wife just kicked the snot out of a new silverado in her PT cruiser( with my mods of course). Lets just say the gentleman was not pleased about it.

badestofthebad  (2) posted on 12.14.2006

chevy should build it with a 454 like the old 90 to 93 ss editions. but this 427 truck is pretty awsome

badestofthebad  (6023) posted on 12.3.2006

Looks impressive’...but can it keep up with the SRT-10...and will G.M. really build it’...I doubt it but i really hope G.M. comes through and blows away the opposition...I’ve been a Chevy guy all my life but the competition has one up on us’....."COME ON GUYS LETS PUT GENERAL MOTORS CORP. BACK ON TOP THIS SHIZZ’NIT!"

badestofthebad  (6023) posted on 11.27.2006

This truck seems like something chevy needs to shut all these srt-10 lovers up i hope they do make it, then dodge would have to find another way to try to top chevy

badestofthebad  (6023) posted on 11.27.2006

To you srt-10 lovers, all i have to say is this "do you remember the GM cyclone, its just a taste of what GM can do", if you dont know what a GM cyclone is then read about it.

badestofthebad  (6023) posted on 11.23.2006

Very doubtful they will build it. Its not bad looking, but the SRT/10 is still the hottest looking truck ever! 3.73 gears with 22’ wheels in a 5000 lb truck? Something burning, what stinks? Looks like its time for a new clutch!!

badestofthebad  (6023) posted on 11.20.2006

Chevy will need more than 500 horses to come play w/ us SRT10’s at the track! And w/ those huge rotors good luck finding drag radials and rims to fit! Gonna have all that power and no way to get it to the ground....plus SRT-10’s love nitrous more than the LS BLOCKS!

badestofthebad  (6023) posted on 11.20.2006

GM is in the right direction, but starting off with less power than they should. The SRT 10 ram has more motor than this truck, stock against stock. And If they did come out with this truck, good luck finding a stock SRT 10 to run against. GM should at least equal the performance of Dodge if they expect a shot.
The SRT 10 still remains king.

badestofthebad  (6023) posted on 11.20.2006

As a SRT-10 owner, I know 1 fact. There will always be someone faster. Is it this truck? Time will tell. Looks good though.

badestofthebad  (6023) posted on 11.20.2006

Chevy won’t build it, even if they do the Dodge SRT-10 will still kick its ass.

badestofthebad  (6023) posted on 11.16.2006


badestofthebad  (6023) posted on 11.15.2006

Lord have mercy!(on mopar/ford) In my wildest dreams i have seen this truck...To the execs @ GM, please hear our cry for this type of vehicle. I purchased a new body style silverado & poured over $10,000 to get it where i wanted, and it cannot compare with the pristine beauty of this sport truck! The Joe Gibbs truck was a let down b/c my stock lightning blew the doors off of it(sadly) GM PLEASE GIVE US THE ABILITY TO TAKE BACK CONTROL OF THE STREETS & TRACK!!!

badestofthebad  (6023) posted on 11.8.2006

This should be a great addition to Chevrolets past history that I well remember in the 60’s and early 70’s
and should be made available in limited quanities of course, to those who well you know will except nothing less in a HP truck. I would like to see this combination and thinking used here the Silerado 427 concept, in the up coming new Silverado SS and Tahoe SS with the 427 engine as a RPO option. Please Build it!

badestofthebad  (6023) posted on 11.1.2006

GM listen up....
If you built, they will come (and buy it)

badestofthebad  (6023) posted on 10.30.2006

Chevy better come out with this Silverado 427 so that i can have one and go out there to show the other performance trucks who to respect

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