When you order your GM Insulator (15858583) from us, you will always receive a genuine OEM part. We only offer OEM parts and accessories to ensure you get the highest quality part that will perfectly fit your 2003-2007 Cadillac CTS vehicle. All parts are backed by a warranty and we offer fitment verification by putting in your VIN at checkout.

You can also shop from your vehicle's specific OEM parts catalog by selecting your make below:

| Buick Models | Cadillac Models | Chevrolet Models | GMC Models |  

| Hummer Models | Oldsmobile Models | Pontiac Models | Saturn Models |