1988-1994 Chevrolet/GMC 1500 Big 3 Upgrade Kit
1988-1994 Chevrolet/GMC 1500 Big 3 Upgrade Kit

1988-1994 GM Truck-SUV Big 3 Upgrade Kit, Gas Engines

2015-2016 Chevrolet / GMC Duramax Big 3 Upgrade Kit 2015-2016 Chevrolet / GMC Duramax Big 3 Upgrade Kit
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Price range: $274.95 through $314.95

This Big 3 Upgrade Kit has been designed specifically to accompany our 1988-1994 GM Truck-SUV Battery Cable Kit, Gas Engines.  The cables included in this kit are intended to complement the installation of a high output alternator and are in addition to the ones included in the Battery Cable Kits.

Our 1/0 AWG kit is perfect when adding our Mechman 250A Alternator for your truck. Our 2/0 AWG kit is perfect for our Mechman 320 and 400A Alternators.  All available below!

We recommend choosing the fuse as close to the output rating of your alternator as possible. For example, choose the 250A fuse for a 250A alternator.

See Description below for specifications, performance, and fitment specifics.

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Description

Product Development

We developed this kit fully in-house to fit perfectly and offer exceptional performance when upgrading the alternator!  We built, installed, and tested our 1/0 AWG Big 3 Upgrade Kit along with one of our Mechman 250 Amp Alternators for the same truck (offered below) in a 1993 Chevrolet Silverado 1500!  The Next Chapter – Complete In-House Product Development tells you all about the process.

As you can see, our kit fits beautifully and man does it deliver the goods when paired up with a Mechman high output alternator!

Mechman 250 Amp Alternator – Connected up!
Blue Sea Systems MEGA Fuse Holder Mounts on Inner Fender
1993 Sliverado 1500 - Output at Idle with Stock Alt and Wiring
1993 Sliverado 1500 – Output at Idle with Stock Alt and Wiring
Early OBS 1/0 AWG Big 3 Upgrade Kit - Output at Idle with Mechman 250 Amp Alternator
Early OBS 1/0 AWG Big 3 Upgrade Kit – Output at Idle with Mechman 250 Amp Alternator

Specifications

Kit includes the following:

  • Battery to Fuse Holder Cable*
  • Fuse Holder to Alternator Cable, loomed*
  • Battery Ground Upgrade Cable, loomed*
  • Alternator Ground Upgrade Cable, loomed*
  • Blue Seas Waterproof MEGA / AMG Fuse Holder w/ fuse
  • Alternator Boot, Red
  • Installation Hardware

*Cable Specifications

Depending on the cable size you order, your cables will be of 2/0 AWG or 1/0 AWG . . .

  • 2/0 AWG CE Auto Electric Supply tinned Oxygen Free Copper (OFC) Battery Cable – 5,929 strands
  • 1/0 AWG CE Auto Electric Supply tinned Oxygen Free Copper (OFC) Battery Cable – 4,704 strands

Fitment Guide

Fits the following vehicles with the 4.3L V6, 5.0L V8, 5.7L V8, and 7.4L Gas Engines:

1988 Chevrolet Silverado 1500 / GMC Sierra 1500
1989 Chevrolet Silverado 1500 / GMC Sierra 1500
1990 Chevrolet Silverado 1500 / GMC Sierra 1500
1991 Chevrolet Silverado 1500 / GMC Sierra 1500
1992 Chevrolet Silverado 1500 / GMC Sierra 1500
1993 Chevrolet Silverado 1500 / GMC Sierra 1500
1994 Chevrolet Silverado 1500 / GMC Sierra 1500

1992 Chevrolet Suburban / GMC Suburban
1993 Chevrolet Suburban / GMC Suburban
1994 Chevrolet Suburban / GMC Suburban

1992 Chevrolet K5 Blazer / GMC Yukon
1993 Chevrolet K5 Blazer / GMC Yukon
1994 Chevrolet K5 Blazer / GMC Yukon

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