🔧 Upgrade your GM audio game—no hacks, just pure plug & play!
The Metra 70-1859 Amp Interface Harness is a vehicle-specific solution designed for 1999-2002 full-size GM trucks and SUVs. It enables easy installation of aftermarket radios by connecting directly to factory wiring without any cutting, featuring a 9-pin connector to activate the factory amplifier. Made from durable ABS, this compact harness ensures a clean, professional upgrade to your vehicle’s audio system.
| Brand | Metra |
| Material | Acrylonitrile Butadiene Styrene |
| Item dimensions L x W x H | 1 x 2 x 3 inches |
| Cable Type | Auxiliary or USB |
| Connector Type | [Incomplete] 9-pin |
| Manufacturer | Metra Electronics |
| UPC | 086429280261 |
| Global Trade Identification Number | 00086429280261 |
| Model | Metra |
| Item Weight | 0.634 ounces |
| Product Dimensions | 1 x 2 x 3 inches |
| Item model number | 701859 |
| Exterior | Painted |
| Manufacturer Part Number | 701859 |
M**N
Worked great! Extra red wire needed
I have to thank the person that mentioned connecting the extra single red wire on the second harness to the blue power antenna wire. I had no sound until I did that. Directions were clear, but that extra wire wasn’t labeled. Worked perfect!
I**
Perfect
I liked everything from the performance to the ease of installation
S**R
Perfect fit for my 2002 Chevy Avalanche
exactly as expected for my aftermarket install. i connected the red amp wire to the blue power antenna wire from the head unit. Everything worked great
J**W
Fit my 1999 Chevy Silverado
Upgraded my head unit in my old Silverado and used this patch cable to ease installation. Wiring code on the package matches to your head units wiring just match the speaker wires power wire etc and no cutting wires! I soldered my connections coupled with heat shrink tubing so I should never have an issue with a bad connection. Make it up on the bench then it is ready to plug into your factory harness and the head unit.
S**K
Perfect fit!
I used this part in my 2000 GMC Yukon and it is a perfect fit!
H**O
Wires are a little thin but easy to install
Wire colors are a little bit confusing, but you'll figure it out. Wires are a little thin but easy to install
1**O
Dependable Metra Quality
You can't go wrong ordering Metra products to adapt your new car stereo to existing OEM wiring. 👍
A**R
Great fit
A++
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