Eckler's Catalogs Available Now!

Father’s Day Sale – Up to 40% Off! Shop Now >

Find Parts That Fit My Vehicle

Blazer C10 C10 Pickup C1500 C2500 C3500 K10 K10 Pickup K1500 K2500 K3500 Chevrolet Truck More Vehicles

Engine Harness, 454ci-HD (1978 Blazer; 1978 C10; 1978 K10)

Item EK-61-395453-1
4 Reviews of similar
Our Price

$424.99

Military, Medical & First Responders $21.25 Available in EK Cash Rewards.
Confirm Eligibility

Add to Cart
Save for later
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    or use

    Shop Owners Save More! Sign up for our dealer program
    Join For FREE
    Loading Indicator

      Product Information

      Features, Description, Q&A

      Features

      • Factory Fit Engine Harnesses Are Manufactured According To The Original General Motors Specifications
      • Each Part Number Is Fully Assembled, Taped And Ready To Install Upon Arrival
      • This Harness Will Plug Into The Firewall In The Factory Location
      • Will Follow Original Routing In The Engine Compartment
      • Combination Of The Engine And Front Light Harness Accomplish Most Functions Under The Hood Of An Early GM Vehicle
      • Engine Harness Design Varied Significantly From Year To Year
      • Most Contain Wiring For The Ignition System, Starter, Heater Blower, And Temperature/Oil Pressure Sender Wires If Applicable
      • Some Vehicles Used A Capillary Tube To Provide An Oil Pressure Reading, These Will Not Be Included In The Wiring Harness
      • On Vehicles With Ignition Points, The Circuit Feeding The Ignition Coil Was Designed With Resistance To Extend The Life Of The Ignition Point Set
      • Modern Electronic Ignition Systems Or High Energy Ignition (HEI) Systems Do Not Require Resistance In The Circuit
      • It Is Recommended That A Harness Modified For HEI Be Ordered If The Ignition System Has Been Upgraded
      • Engines Include V8 454 Cubic Inches With Heavy Duty Chassis, Single Oil Pressure Switch Connection
      • Fits 1978 Blazer; 1978 C10; 1978 K10

      Description

      Engine Harness Overview. The 78TRK Enghrns- 454-HD provides a factory fit, fully assembled wiring harness built to original General Motors specifications. Designed to plug into the firewall at the factory location, it follows the original routing under the hood, managing electrical components essential for engine operation. This harness is critical for maintaining correct engine wiring, including ignition, starter, heater blower, and sensors, ensuring reliable functionality in early GM vehicles equipped with heavy-duty chassis and V8 454 engines.

      Construction and Appearance. Manufactured with durable materials, this engine harness is taped and assembled for a direct-fit installation. The wiring is configured to Original Equipment standards, ensuring compatibility and longevity. The harness is designed for a clean, factory-correct appearance and fitment, minimizing any modifications or adjustments during installation.

      Installation. Installation is straightforward and requires no drilling, as the harness plugs directly into the firewall and matches original OEM routing. It is ideal for restoration projects seeking authentic look and function with minimal effort.

      Application. This engine harness fits 1978 Chevrolet Blazer, C10, and K10 models equipped with the 454 cubic inch V8 and heavy-duty chassis, featuring a single oil pressure switch connection.

      CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

      4.8

      Reviews of similar Classic Electrical Products (4)

      Questions & Answers

      No questions about this product yet. Ask the First Question