$20 Off $250 / $40 Off $500 / $80 Off $1,000 - Use Promo Code: PROJECT

Make/Model Search
Make/Engine Search

Brands
Savings Central
Contact Us
Help Center

My Garage
Wish List
Order Status & Returns

Welcome
My Account

Order Status

Wish List
Savings Central
Shop by Brand
Shop Your Passion
- Shop Your Passion
- Truck / SUV
  
  Jeep®
  
  Restoration
  
  Stock Replacement
  
  Late Model Muscle
  
  Tools
  
  Gifts, Clothing, & More
  
  Circle Track
  
  Street Rod
  
  Powersports
  
  Paint & Body
  
  Marine
  
  Jr Dragster
Gift Cards
My Garage
See Our Catalogs
News & Events
Career Opportunities
Contact Us
Help Center
New Products
Shop by Make/Model
Sign In

Search Make/Model

Search Make/Engine

Sign In

Welcome
Account Dashboard
Profile
Order Status & Returns
Buy It Again
Wish List
Rewards Program
Gift Cards & Summit Bucks
Address Book
My Garage Settings
Email Preferences
Text Notifications
My Reviews
My Questions
Catalogs
Tax Exemption
Sign In

$20 Off $250 / $40 Off $500 / $80 Off $1,000 - Use Promo Code: PROJECT

Summit Racing SpeedCard - learn how to get 15% back - Get Details!

Filters

In Stock
- In Stock Items. Ships Today. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- In Stock Items, Including at a Supplier. Ships In a Few Days. (5) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- All Items, Including Not In Stock (7) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Brand
- Standard Motor Products (5) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Curt Manufacturing (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Trailer Harness Type
- Extension (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Main (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Trailer Harness Length (in.)
- 24 (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Trailer Harness Length (ft.)
- 2.00 (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Trailer Connection
- 7-way male (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Trailer Wiring Harness Extension Type
- 7-way round male to 7-way round female (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Quantity
- Sold individually. (2)
Make/Model
Price Range
Filter Options
- Stock Replacement (5)

Selected Filters

Filter Results by Vehicle

Loading...

Home
Trailer Wiring Harnesses
OLDSMOBILE
Product Results

Availability

- In Stock Items. Ships Today. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- In Stock Items, Including at a Supplier. Ships In a Few Days. (5) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- All Items, Including Not In Stock (7) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Filters
Brand
- Standard Motor Products (5) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Curt Manufacturing (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Trailer Harness Type
- Extension (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Main (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Trailer Harness Length (in.)
- 24 (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Trailer Harness Length (ft.)
- 2.00 (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Trailer Connection
- 7-way male (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Trailer Wiring Harness Extension Type
- 7-way round male to 7-way round female (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Quantity
- Sold individually. (2)
Make/Model
Price Range
Filter Options
- Stock Replacement (5)

OLDSMOBILE Trailer Wiring Harnesses

Individual Parts

Part Groups

Results 1 - 7 of 7

CURT Trailer Wiring Harness Extensions 56475

CURT Trailer Wiring Harness Extensions 56475

CURT Trailer Wiring Harness Extensions 56475

Trailer Wiring Harness Extension, 7-way Round Male To 7-way Round Female, 7-way Male Trailer Connection, 24 in. Length, Chevy, Ford, GMC, Ram, Each

Part Number: CHT-56475

Not Yet Reviewed

Estimated Ship Date: Today

...Loading

Estimated Ship Date: Today

Standard Motor Trailer Towing Harness Adapters TC656

Standard Motor Trailer Towing Harness Adapters TC656

Standard Motor Trailer Towing Harness Adapters TC656

Trailer Connector

Part Number: SMP-TC656

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 6, 2026 if ordered today

...Loading

Estimated Ship Date: Apr 6, 2026 if ordered today

Standard Motor Products Trailer Wiring Harnesses TC655

Standard Motor Products Trailer Wiring Harnesses TC655

Standard Motor Products Trailer Wiring Harnesses TC655

Trailer Connector

Part Number: SMP-TC655

Not Yet Reviewed

...Loading

Standard Motor Products Trailer Wiring Harnesses TC654

Standard Motor Products Trailer Wiring Harnesses TC654

Standard Motor Products Trailer Wiring Harnesses TC654

Trailer Connector

Part Number: SMP-TC654

Not Yet Reviewed

Estimated Ship Date: Apr 20, 2026 if ordered today

...Loading

Estimated Ship Date: Apr 20, 2026 if ordered today

Standard Motor Products Trailer Wiring Harnesses TC653

Standard Motor Products Trailer Wiring Harnesses TC653

Standard Motor Products Trailer Wiring Harnesses TC653

Trailer Connector

Part Number: SMP-TC653

Not Yet Reviewed

Estimated Ship Date: Apr 20, 2026 if ordered today

...Loading

Estimated Ship Date: Apr 20, 2026 if ordered today

Standard Motor Products Trailer Wiring Harnesses TC652

Standard Motor Products Trailer Wiring Harnesses TC652

Standard Motor Products Trailer Wiring Harnesses TC652

Trailer Connector

Part Number: SMP-TC652

Not Yet Reviewed

Estimated Ship Date: Apr 20, 2026 if ordered today

...Loading

Estimated Ship Date: Apr 20, 2026 if ordered today

Curt Manufacturing Trailer Wiring Harnesses 58925

Curt Manufacturing Trailer Wiring Harnesses 58925

Curt Manufacturing Trailer Wiring Harnesses 58925

RV HARNESS CHEVROLET TRAILBLAZER 2004 2007

Part Number: CHT-58925

Not Yet Reviewed

Estimated Ship Date: Apr 15, 2026 if ordered today

...Loading

Estimated Ship Date: Apr 15, 2026 if ordered today

1

Page 1 of 1

Modal Header

Contact us with questions.

Call To Order

This is a custom order part. You can order this part by Contacting Us.

Summit Racing Speedcard. Synchrony Car Care.

Summit Racing Equipment SpeedCard

Jumpstart Your Next Project!

View Details|See if you Prequalify

Stay Updated with Emails from Summit Racing

Never miss a sale on new parts, tools, and more!

= Required

First Name

Last Name

Email Address Email required

See Our Catalogs

News & Events

News & Events Home
OnAllCylinders (blog)
Calendar of Events
New Product Releases
Summit Racing News
News You Can Use
Featured Vehicles
Media Center
Sanctioning Bodies

Help

Help Center
Return Policy
Beat-A-Price Guarantee
Payment Options
Contact Us

Social

Facebook
X/Twitter
Instagram
Pinterest
YouTube
Podcast

About Summit

Corporate History
Retail Locations

My Account

Profile
Email Preferences
Order Status & Returns
Wish List
Address Book
My Reviews
My Questions
My Garage
Sign In

Career Opportunities

More

Summit Racing Credit Card
Gift Cards
Calculators & Tools
Promo Exclusions
Become an Affiliate
Summit Racing Rewards Program
Summit Racing Equipment Protection Plan

Terms of Use | Privacy and Security | Site Accessibility
Copyright 2026 by AUTOSALES, INCORPORATED
dba Summit Racing Equipment | Trademarks

Let's Build it Together^™

Modal Header