Speedway 1999-2003 Vortec V8 Wiring Harness
Speedway 1999-2003 Vortec V8 Wiring Harness
Speedway Motors

|

#91009903

Speedway 1999-2003 Vortec V8 Wiring Harness

$612.99

/each

In Stock


Quantity

Need Help? Call to Order

Add to a list

Share

Select an engine to verify Fitment

Select Engine

Product Summary

Universal Fit

    See more details

    Key Specs

    MFG. Part #91009903
    BrandSpeedway Motors
    See more specs

    Need To Know

    Need help?

    855.313.9176
    View the Help Center

    Quick and Easy Returns

    Return Policy

    Speedway Motors 91009903 Details

    Take the fear out of electronic fuel injection! These engine wiring harnesses are designed to make your engine transplant effortless. Each new harness contains in-depth application-specific instruction sheets, clearly marked factory GM connectors, labeled GXL jacketed wire, GM color coding, and pre-fitted corrugated slit loom for an extra value and professional look. All un-needed emissions wiring is eliminated to make the install as simple and reliable as possible.

    1999-2003 Vortec V8 - Cable Throttle Body

    • Made from premium grade GXL jacketed automotive wire
    • Most wiring is larger gauge than stock application for durability
    • No splices to reduce points of failure
    • All primary grounding is done at the head or block and grounding points are isolated from each other to reduce electrical interference and minimize ground looping
    • Harness wiring matches GM wiring configuration and jacket colors follow GM color coding for easy identification
    • All electrical connectors are made by Delphi or Packard and are direct fit for GM cars and trucks
    • Can be installed to run engine in 20 minutes, but figure 4-6 hours for a professional installation
    • Diagnostic connector or OBD2 port for connection to scanners and tuning tools

    Charts

    Warranty Information

    Click for details

    This harness is covered under warranty for the lifetime of the original owner against defects in workmanship within the wiring harness only, not time, or any damage in result of defective workmanship of the wiring.

    Speedway Motors 91009903 Specifications

    KEY SPECS
    MFG. Part #91009903
    BrandSpeedway Motors
    GENERAL
    NotesHarness is standard length for mechanical throttle.
    Sold in QuantityEach

    Ratings & Reviews

    5

    2 Reviews

    Overall Assessment

    Customers applaud the affordability and superior quality of our harness, specifically designed for 2002 5.3/4l60e models. Appreciated for their quality connectors and clear labels, they outperform stock harnesses. Although its branch from engine slightly differs from stock harnesses, it fits perfectly well. The harnesses are praised for their OEM quality plugs and are highly recommended for seamless installations of the 5.3/4L60 into vehicles from the 70s. Overall, product performance and value surpass customer expectations.

    Write A Review

    5

    2 reviews

    5

    2

    4

    0

    3

    0

    2

    0

    1

    0

    Filter by Ratings

    Cant beat the bang for the buck

    5.0

    a year ago

    CalRM

    Fresno, CA

    Verified

    Used the harness on a 2002 5.3/4l60e that i put in my 1969 fj40. I originally reworked the stock harness but after so many issues with it, i decided to buy this harness. The nice, new connecters are awesome to work with and everything was labeled nicely. My only "complaint" is the where the harness meets the engine, it is branched a little weird compared to the stock harness but everything reached where it should. Overall, a really nice harness for the price.

    Would Recommend

    Great product at a fair price

    5.0

    2 years ago

    JB

    Douglasville, GA

    Verified

    Used this for a 5.3 / 4L60 (2000) into a 70's Van. Worked great. All plug- ins were OEM quality.

    Would Recommend

    Showing 2 of 2 reviews

    Questions & Answers

    7 Questions • 8 Answers

    I am doing an LS swap on my 98 Silverado. Will this harness match on my truck with a 6.0 4l80e?

    by Jesse

    • 8 years ago

    1 answer

    View Answer

    does it have any plugs for o2 sensors?

    by John

    • 8 years ago

    1 answer

    View Answer

    Will this harness work with an built turbo 5.3 with a th400 transmission with a 2000 truck ecu

    by Gabriel

    • 8 years ago

    2 answers

    View Answers

    I'm doing a vortex swap into my 2nd gen camaro. Will i be able to wire this harness up to the main fuse block in my camaro? Will i have to cut any wires from this harness to wire it into the main fuse block?

    by Camaroguy

    • 8 years ago

    1 answer

    View Answer

    I have a 2003 5.3 Vortec that has Flex-Fuel and the injector connectors may be different. Do you have a harness set up for Flex-Fuel engines? Thank You, Bud

    by Bud

    • 9 years ago

    1 answer

    View Answer

    Dose this harness have the truck style injector wiring or the car style?

    by Jboxjohnny

    • 10 years ago

    1 answer

    View Answer

    Does this harness have the ability to control a 4l60e? Also does it have the ability to be expanded to control a 4l80e?

    by

    • 14 years ago

    1 answer

    View Answer

    7 of 7 questions shown

    Fitment

    • GM LM4

    • GM LM7

    • GM LQ9

    • GM LM7

    • GM LQ9

    • GM LM7

    • GM LQ9

    • GM LM7

    • 4.8 Chevy LS V8

    • GM LM7

    • GM LQ4

    • 4.8 Chevy LS V8

    • GM LM7

    • GM LQ4

    • GM LQ4

    • GM LQ4

    • GM LQ9

    • GM LQ4

    • GM LM7

    • GM LQ4

    • GM LQ9

    • GM LQ4

    • GM LQ4

    • GM LQ4

    • GM LQ4

    • GM LQ4

    • GM LM4

    • GM LM7

    • GM L59

    • GM LM7

    • GM LQ4

    • 4.8 Chevy LS V8

    • GM L59

    • GM LM7

    • 4.8 Chevy LS V8

    • GM LM4

    • GM LM4

    • GM LM4

    • 4.8 Chevy LS V8

    • GM LM7

    • GM LQ4

    • 4.8 Chevy LS V8

    • GM LQ4

    • 4.8 Chevy LS V8

    • GM LM7

    • GM LQ4

    • 4.8 Chevy LS V8

    • GM LQ4

    • 4.8 Chevy LS V8

    • GM LM7

    • GM LQ4

    • 4.8 Chevy LS V8

    • GM LQ4

    • GM L59

    • GM LM7

    • GM LQ4

    • GM LQ4

    • GM LQ4

    • GM LM7

    • GM LQ4

    • GM LQ4

    • GM LQ4

    • GM LQ4

    • GM LQ4

    • GM LQ4

    • GM LQ4

    • 4.8 Chevy LS V8

    • GM LM7

    • GM LM7

    • GM L59

    • GM LM7

    • GM LQ4

    • GM LQ4

    • GM LQ4

    Customer Impersonation Script