GMC Classic Car Tech Articles

GM Automatic Transmissions - Shifting Priorities

Gearstar Transmissions gives you everything you need to know about GM automatic transmissions. Whatever questions you might have about transmissions you will find your answer here. more

383 Crate Engine - The Heart Of The Matter

Smeding's Handbuilt, Dyno-Tested 383 Hot Rod Crate Motor more

Gear Vendors Overdrive - Bullet Proof! - Tech

Not Even Kryptonite Can Hurt This Killer Combination more

GM Disc Brakes - Drop, Stop & GO!

Dropped Axle & Disc Brakes for '55-59 GM Pickups more

GM Performance Parts ZZ383 Dyno Test - Crate Engine Confessional

746 HP with a ZZ383 & Vortech's Latest Blow-Through Huffer more

GM Bow Tie Vortec Small Block Engine - Blue Thunder 355

Blue Thunder 355 more

Wired Is Good

Looking back on our recent feature trucks, it's no surprise that the '60-66 Chevy and GMC trucks have become popular for both restoration and rodding. The choices for updated suspension, braking, air conditioning, and replacement sheetmetal have added new life more

GM Small Block Build World Products Heads - The Mighty Mouse of Might

Expanding Blue Thunder's performance has been my goal from the beginning of this project and I believe I've accomplished that task, both in handling and in acceleration. While some would have preferred that the entire budget went towards improving quarter-mile more

GM Performance Parts ZZ572 Power Curve - Power Moves

Read the tech article on raising the Power Curve of the GM Performance Parts ZZ572, brought to you by the experts at Chevy High Performance Magazine. more

Project Old School-Building Out the Doors

Ever Since Project Old School's inception, there were plans to fit the truck with one-piece glass. I knew this would be difficult, given the triangular shape of the opening. The reason is that unless the window is all the way up in the channel or all the way d more

Project Old School: Camber Correction

Ever wonder why those trucks you see sitting flat on their framerails have front wheels that lean inward at a 45-degree angle? The answer is camber. Camber is the measurement of tire lean in degrees. If the top of the tire tilts inward, the vehicle has negativ more

Project Old School: In Control

It's no secret that sway bars are extremely beneficial to the handling capabilities of old trucks. It's also no secret that most of the '63-72 GM products did not come with them as standard equipment. Simply put, there is no easier or more cost effective way t more

Project Old School, Part VII

By the time you read this, Project Old School will have successfully been driven to truck shows and rod runs all over the Southland. But it wasn't always that way. This installment focuses on the suspension buildup that took place over the very same 72-hour pe more

Project Old School, Part VI

After many months of cutting, hammering, shaping, filling, welding, sanding, primering, and spraying, Project Old School finally has a coat of black suede on it. We left off last month by torching all four coils 'til the '64 was resting on the bumpstops and bo more

Project Old School, Part V

At this point, I can't believe how far this truck has come in such a short period of time. We took a rough looking '64 Chevy longbed with a small back window and created the truck I've always wanted. I was now looking at a big-window shortbed with a GMC front more

Project Old School, Part IV: Relocation Program

So I'm in the midst of the tedious block-sanding process, with the help of Chris and crew at Totally Polished, of course, and learning what hard labor is all about. We realize that there are a couple obstacles in the way of shooting any kind of final primer or more

Project Old School, Part III: Clean Shaven

When we left off at Part II, Project Old School was officially a big-window shortbed. There were still many obstacles to overcome, however. There's still the 1/2-inch of body filler residing in large areas of the bed, and the thick layer of glue-pot glue that more

Project Old School, Part II

Last month, I introduced you all to Project Old School, the newest project vehicle here at CLASSIC TRUCKS. I wouldn't go so far as to say I've bitten off more than I can chew, but that's mostly because I have Chris Daley and the rest of the crew at Totally Pol more

GMC Sierra Power Steering - Quadrasteer

With the debut of Quadrasteer new power steer on the 2002 GMC Sierra Denali, GM's engineering team considered it to be a milestone in full-size truck handling and control. more

Swappin' And Droppin'

One of the few drawbacks when building a '60s-era GM truck is the limited amount of choices when it comes to updating the rear axle assembly. Since the majority of these trucks came from the factory with manual transmissions, they usually are found to have a r more

Stealth S-15

The Air Force has a black stealth fighter called the F-117 that has proved to be as sneaky as it is deadly in battle. Tuner impresario John Lingenfelter has his own four-wheel version—painted a more pleasing red. Both will sneak up on you and hit you hard more

GM 350 Crate Engine Build VIII - The Goodwrench Quest, Part VIII

Read the tech article on a GM 350 Crate Engine Build, brought to you by the experts at Chevy High Performance Magazine. more

GM 350 Crate Engine Build VII - The Goodwrench Quest, Part VII

Read the tech article on a GM 350 Crate Engine Build, brought to you by the experts at Chevy High Performance Magazine. more

GM 350 Crate Engine Build VI - The Goodwrench Quest, Part VI

Read the tech article on a GM 350 Crate Engine Build, brought to you by the experts at Chevy High Performance Magazine. more

GM 350 CI ZZ4 Crate Engine Build - Hail The Gladiator

Read the tech article on a GM 350ci ZZ4 crate engine Build, brought to you by the experts at Chevy High Performance Magazine. more