If you're diving into a wiring project for your '83-'87 Chevy or GMC truck, the Classic Update Kit is a game-changer. This isn't just another wiring kit; it's designed with your specific model in mind, making the whole process feel less like a chore and more like a satisfying upgrade. Trust me, I've been there, and this kit really simplifies things.

One of the standout features is the replacement headlight switch. It comes with a built-in 25-amp circuit breaker, which is a nice touch for those of us who’ve had to deal with flickering lights. Plus, the adjustable length shaft and custom knob make it feel like it belongs in your truck. You won't have to worry about jury-rigging anything here.

Everything you need is included; from the standard turn signal flasher and hazard flasher to a horn relay that's already mounted on the harness. And the fuse box? It’s designed to fit right in the original spot without any firewall modifications. Seriously, it’s all about keeping it simple.

The harness is laid out perfectly for aftermarket accessories, so whether you're adding a new gauge package or upgrading your wiper system, you won’t be left scrambling for connections. If you're swapping in an aftermarket steering column, the connectors will plug right in, and if you’re using a stock GM column from '75 and up, you’re covered too. They even throw in adapters for older columns.

Don't forget about the courtesy lamp assemblies—they're included for that extra touch of convenience. The instrument cluster wiring is designed with a "cluster harness disconnect" system, which makes service and assembly a breeze. And if you're looking to install aftermarket gauges from brands like Dakota Digital or Autometer, you're all set with the original terminals and connectors provided.

The rear body harness plugs into the main harness effortlessly, and the longer leads let you route the wires however you want. You'll find backup light leads, stop and tail light connections, and even the fuel tank sender lead—all in one package. Plus, original-style lamp sockets and side markers are included for both fleet and step-side setups.

Another handy feature is the new floor dimmer switch, which makes installation a lot easier. The engine wiring covers everything you need, from coil feeds to oil pressure, and even includes a heavy gauge alternator feed for those high-output setups. You’ll get connectors for power and tach leads for GM-style HEI distributors, so you can keep everything running smoothly.

The front lighting harness has extra-long leads, allowing for stock or custom appearances. All the necessary connections for headlights, parking lights, and directional lights are included, along with a switched trigger wire for an electric fan relay if you're going that route.

In short, this kit is built for the enthusiast who wants to do things right without the headache. It’s straightforward, comprehensive, and designed to keep your classic truck running and looking great. Whether you're restoring a beloved ride or just looking to tidy up the wiring, this kit is a solid investment.

Fits the following models:

• Chevrolet Blazer 1987
• Chevrolet C/K 10 1983-1987
• Chevrolet C/K 20 1983-1987
• Chevrolet C/K 30 1983-1987
• Chevrolet C15 1983-1988
• Chevrolet C35 1983-1987
• Chevrolet K5 Blazer 1983-1986
• Chevrolet R/V 10 1987
• Chevrolet R/V 20 1987
• Chevrolet R/V 30 1987-1988
• Chevrolet R20 1987-1988
• Chevrolet Suburban 1987-1988
• Chevrolet V30 1987-1988
• GMC C/K 1500 1983-1986
• GMC C/K 2500 1983-1986
• GMC C/K 3500 1983-1986
• GMC Jimmy 1983-1987
• GMC R1500 1987
• GMC R2500 1987
• GMC R3500 1987
• GMC V1500 1987
• GMC V2500 1987
• GMC V3500 1987

Check out the video below for a closer look: