GM Genuine Parts 25958494 Driver Side Tail Lamp Wiring Harness - OE

In this review of the GM Genuine Parts 25958494 Driver Side Tail Lamp Wiring Harness, the bottom line is simple: this is for vehicle owners and technicians who want a direct replacement harness that mirrors factory fit and durability. Our review finds the harness stands out for its build quality and straightforward installation, making it a practical choice when a factory-style repair is needed. It is particularly useful when the original harness is damaged by moisture, abrasion, or vibration and the owner prefers a GM-recommended component over an aftermarket generic.

Key Features

• Durable outer coverings: The sheath protects wiring from vibration, abrasions, and moisture to extend service life in harsh conditions.
• Color-coded wires: Wires are coded correctly which makes installation faster and reduces the chance of incorrect connections.
• Manufactured to OE spec: Built to meet GM OE specifications so form and function match the original factory component.
• No programming required: The harness installs without the need for module programming, simplifying a direct replacement job.
• Replacement reliability: As a GM-recommended replacement, it offers the same quality and durability expected from an original equipment component.
• Measured length: With a wiring harness length of 44.87 in, it provides the reach needed for the driver side tail lamp routing on compatible models.

Who It's For

This harness is aimed at owners of compatible GM vehicles, professional mechanics, and DIYers who prefer GM OE parts for repairs. It is a good choice when the original tail lamp harness is corroded, frayed, or has failed connectors and a dependable, like-for-like replacement is required.

It is not the best option for vehicles that need custom wiring changes, aftermarket modifications to lighting, or when a universal harness would be more appropriate. Buyers should verify vehicle compatibility before purchase and choose a harness specifically matched to their model year and trim.

Pros & Cons

Pros

• Durable outer coverings resist moisture and abrasion for longer life.
• Color-coded wiring simplifies installation and reduces wiring errors.
• Manufactured to GM OE specification for reliable fit, form, and function.
• No programming required, allowing quick replacement.

Cons

• Fit receives mixed feedback from some customers, so confirming exact vehicle compatibility is important.

Specifications

Brand	GM GENUINE PARTS
Part Type	Driver side tail lamp wiring harness
Wiring Harness Length	44.87 in
Programming	No programming required
Manufacture Standard	GM OE specification
Durability Features	Outer coverings protect against vibration, abrasion, and moisture

Our Verdict

The GM Genuine Parts 25958494 Driver Side Tail Lamp Wiring Harness is a solid OE-style replacement for owners and technicians seeking reliability and proper fit. With robust coverings, color-coded wires, and no programming needed, it represents good value for restoring factory-like function, provided buyers confirm fitment for their specific GM model.

Frequently Asked Questions

Does this harness require programming?
No, this harness installs without any programming required.

Is this a genuine GM part?
Yes, it is a GM Genuine Parts item manufactured to GM OE specification.

Will this fit my vehicle?
Fit is intended to match factory routing, but confirm exact vehicle compatibility before purchasing to avoid fit issues.