2008–2009 Pontiac G8 GT Complete Engine & Transmission Wiring Harness – OEM Harness

For Sale: Complete 2008–2009 Pontiac G8 GT engine and transmission wiring harness. This is a great option for anyone restoring a Pontiac G8 GT, replacing a damaged factory harness, or completing an LS-powered swap and looking for the correct OEM-style wiring.

The harness pictured is being sold as shown and includes the main engine/transmission wiring, connectors, fuse/relay box, and associated wiring sections visible in the photos. If you are tired of trying to piece together a wiring system from multiple sources, this gives you a much better starting point with the factory-style connections already in place.

Whether you’re repairing a G8 GT, building a project car, or looking for replacement wiring for an LS-based setup, an original OEM harness can save significant time compared with building an entire harness from scratch.

Product Details

Item	Details
Vehicle	Pontiac G8 GT
Model Years	2008–2009
Type	Complete Engine & Transmission Wiring Harness
Style	OEM Factory Wiring
Application	G8 GT / LS-powered applications
Included	Engine & transmission wiring, connectors, fuse/relay box and wiring shown
Condition	Used – see photos
Quantity	1 Complete Harness

What’s Included

• Complete engine wiring harness
• Transmission wiring section
• Factory connectors and plugs
• Engine sensor wiring
• Main wiring sections shown in the photos
• OEM fuse/relay box
• Factory wiring junctions and connections
• Additional harness sections shown in the pictures

You will receive the harness shown in the photos.

Why Buy an OEM G8 GT Harness?

Replacing or building wiring for an LS-powered vehicle can become expensive and time-consuming very quickly. Having the factory harness gives you the original connectors and wiring configuration, making it a valuable part for a restoration or performance project.

This harness is especially useful for buyers who are converting, repairing, or putting together a Pontiac G8 GT LS swap project and want factory-style wiring rather than starting with a completely bare wiring system.

An OEM harness can also be a great source for hard-to-find factory connectors and wiring components that can be difficult to purchase individually.

Great for LS Swap & G8 Projects

The Pontiac G8 has become a popular platform for LS performance builds, engine replacements, restorations, and custom projects. If you’re putting together a G8 GT and need the factory engine and transmission wiring, this harness can help get your project moving in the right direction.

It is also worth considering if your existing harness has:

• Damaged connectors
• Cut or modified wiring
• Broken plugs
• Corrosion
• Missing sections
• Previous wiring modifications
• Damage from an engine or transmission replacement

Instead of spending time trying to locate individual connectors and sections, you can start with a complete OEM harness.

Condition

This is a used OEM wiring harness. The harness has normal signs of previous use, including handling marks and wear consistent with a used factory component. Please look closely at all photos before purchasing.

The pictures are of the actual harness you will receive, so you can see the connectors, wiring, fuse box, and overall condition for yourself.

Important Fitment Information

This listing is specifically for a 2008–2009 Pontiac G8 GT engine and transmission wiring harness. Wiring can vary depending on model, engine, transmission, and previous modifications.

If you’re unsure whether this harness will work for your specific vehicle or swap, send me your year, model, engine, and transmission before purchasing. I can help verify the application based on the information available.

Pontiac G8 GT Wiring Harness for Sale

If you need a 2008 G8 GT wiring harness, 2009 Pontiac G8 GT engine harness, G8 GT transmission harness, OEM LS wiring harness, or complete G8 engine wiring harness, this is an excellent part to have on hand for your project.

Don’t waste time piecing together a wiring system when you can start with the factory harness.

Message me with any questions about fitment or what’s included.