If you're diving into a restoration project for your classic truck, Blazer, or Suburban from 1947 to 1991, these wiring kits are a game changer. Forget the headaches of mismatched wires and confusing circuits—this is the real deal. You can choose between the Deluxe 20 circuit system or the Standard 13 circuit, depending on how much you want to wire up.

One of the standout features is how these harnesses are designed for ease of installation. They come with all the necessary lead wires and connections that you can easily disconnect for the major branch circuits. Just mount the fuse box, and you'll be routing each circuit to its destination in no time. The instructions are straightforward, so you won’t be left scratching your head.

Now, let’s talk quality. These harnesses are built with top-notch GM terminals and durable GXL/XLPE wire, which can handle temperatures from -60°F to +275°F. That means whether you're in the dead of winter or under the scorching sun, these wires will hold up. Plus, everything is color-coded and labeled every 2-3 inches, so you’ll know exactly what’s what when you’re connecting your headlights, parking lights, and all the other essentials.

The Deluxe 20 circuit system is where it gets really interesting. It includes wiring for your instrument gauges—oil pressure, water temperature, voltmeter, fuel, and tachometer. Not only that, but it also covers dash lighting for all those gauges, as well as turn signals and high beam indicators. There’s a gauge cluster disconnect harness included, making it super easy to manage your dashboard connections. The steering column wiring is also taken care of, with connections for the horn, directional signal switch, and hazard lights. You even get a standard GM column connector set to plug right into any 1969-74 GM steering column.

Don’t worry about the engine compartment either; this kit has got you covered. It includes wiring for your coil, distributor (whether you're running points or HEI), oil pressure and water temp senders, starter, and even the neutral safety switch. There are leads for both GM "SI" internal regulated and "1" wire alternators, plus accessory feeds for your heater, radio, wipers, and more. All the necessary fuses, flashers, and horn relays are included too.

If you’re looking to add some modern comforts, the Deluxe system also comes with accessory power leads for things like cruise control, power windows, and even electric fuel pumps. It’s all about making your classic ride feel like a dream while keeping that vintage vibe intact.

Here’s a quick rundown of some of the models this kit fits:

• Chevrolet 1500 (1954)
• Chevrolet Blazer (1969-1974 & 1987)
• Chevrolet C/K 10 (1960-1987)
• Chevrolet Suburban (1960-1987)
• GMC Jimmy (1970-1987)
• ...and many more!

So, if you’re serious about bringing your classic truck back to life, this wiring harness is a solid investment. It’s all about making your restoration project smoother and more reliable.