Speedway 1999-2003 Vortec V8 Wiring Harness, Extended

#91099034

Speedway 1999-2003 Vortec V8 Wiring Harness, Extended

Name: Speedway 1999-2003 Vortec V8 Wiring Harness, Extended
Brand: Speedway Motors
SKU: 91099034
Price: 623.99 USD
Availability: LimitedAvailability
Rating: 4.7 (3 reviews)

3 Reviews

2 Questions

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

$623.99

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Product Summary

Universal Fit

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

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Key Specs

MFG. Part #	91099034
Brand	Speedway Motors

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Installation Details

Installation Tips

This harness is made with 4L60E connections included and is easily modified for 4L80E. Also has speed sensor wiring. ECM programming will need to match transmission style.
Common aftermarket fuel pump relay is included. Fan relay is not included since the '99-'03 trucks had mechanical fans, however there are fan relay trigger wires included in the break out.
These harnesses feature all of the connection points necessary to run the engine and transmission if applicable. The emission equipment has been eliminated and only the needed connections to run the engine and transmission are incorporated.
ECM programming will need to be done to remove all of the unneeded trouble codes that may be active from the stock application. Programming will need to be done to remove VATS (vehicle anti-theft system) programming, otherwise the engine will not run. These wiring harnesses do not include any type of VATS module to defeat the theft system.
Standard length harnesses are 54" from the back of the engine to the PCM connectors. Extended length harrnesses add an extra 4 ft. to remote-mount the PCM in your glovebox or underneath your dash.

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Speedway Motors 91099034 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

Warranty Information

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.

CA Prop 65

Speedway Motors 91099034 Specifications

KEY SPECS
MFG. Part #	91099034
Brand	Speedway Motors

GENERAL
Notes	Four foot extended length, for mechanical throttle.
Sold in Quantity	Each

Ratings & Reviews

4.7

3 Reviews

Overall Assessment

Customers value the product for its quality and perfect fit, specifically for LS swaps into vintage autos, like a 1963 Impala. The product's practicality is appreciated, with the added length of the ECM extension permitting flexible placement. The harness is compatible with Multec 2 injector connectors. However, users suggest verifying the fuel injector type before purchase. In comparison to competitor's offerings, this harness performs excellently, with users ready to repurchase based on its effectiveness. Its superior attributes solidify its position in the market.

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4.7

3 reviews

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I would buy it again

5.0

6 years ago

Twin

North Carolina

Verified

Harness was a perfect fit for my LS swap into a 1963 Impala.

Would Recommend

Nice harness

4.0

8 years ago

Daniel

San Antonio, TX

Verified

Very nice harness, The extra 4 feet of ECM extension let me mount my ECM behind the seat of my truck. The harness comes with Multec 2 injector connectors but my engine came with EV6 injectors so I had to change the connectors. So, double check the fuel injector type you need before ordering!

Would Recommend

Speedway 1999-2003 Vortec V8 Wiring Harness,Extended

5.0

9 years ago

none

Estherville Ia.

Verified

It is a great wiring harness. Fit and works great.

Would Recommend

Showing 3 of 3 reviews

Questions & Answers

2 Questions • 3 Answers

Sort Questions

I need this Harness but Im using a Th400 trans. is it possible to use this harness with this transmission?

by 1964 Chevelle

• 6 years ago

1 answer

View Answer

Is this a harness that has head light and tail light fuel pump ect I'm putting a 5.3 4l60 out of a 99 chevy 2wd pickup into a streetrod and looking for a complete harness and who flashes the computer

by Jason

• 7 years ago

2 answers

View Answers

2 of 2 questions shown