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General Motors Bluetooth® Wiring Harness

Integrates Bluetooth cell phone kits with factory stereos in select vehicles, 1985-up

Item # 120BT1858

Find what Fits your car

California customers:
Please click here for your Proposition 65 warning.

Discontinued item
12 questions - 12 answers

Item # 120BT1858

About the General Motors Bluetooth® Wiring Harness

 Add Bluetooth® to your vehicle

 Add Bluetooth® to your vehicle

This harness works with a Parrot hands-free Bluetooth kit to connect your compatible phone to your car's factory stereo system. Find the correct harness for your vehicle, then pick one of these Parrot kits: Parrot MKi9200, Parrot MKi9100, Parrot CK3100, or Parrot CK3000. You're on your way to enjoying hands-free calling in your car.

Remove the plug from the back of your factory radio. The General Motors Bluetooth Wiring T-harness plugs into that factory plug, then provides a connection to your factory radio and the Bluetooth kit. Reinstall the factory radio and mount the Bluetooth kit, and you're ready to go. When your cell phone rings, your radio or CD player is muted automatically, and the sound from your phone comes through your front speakers. Warranty: 1 year.

Please enter your vehicle information or call an Advisor at 1-888-955-6000 to find out if this model is compatible with your vehicle.


What's in the box:

MFR #BT-1858

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General Motors Bluetooth® Wiring Harness reviews

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Crutchfield response

<< >>

More details on the General Motors Bluetooth® Wiring Harness

Stacey B.

Product Research


Overview: This adapter harness allows you to install a compatible Parrot Handsfree Bluetooth cellular kit into select GM vehicles. One end of the adapter has a light gray/black rectangular 20-pin female connector and the other end of the adapter has the following connectors: black/blue rectangular 20-pin male connector, black rectangular 16-pin male connector (has two separate 8-pin connectors), and black rectangular 16-pin female connector (has two separate 8-pin connectors). The black 16-pin connectors plug into the Parrot harnesses, while the light gray/black and black/blue connectors interface with the vehicle's factory wiring.

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Customer Q&A

Crutchfield asked: Why did you buy this?
This harness was suggested by Rex my Crutchfield advisor which was something I was unaware existed. This should make the system connect permanently and with the best results. Thanks again Rex. [ Tony  Nov 27, 2016 ]
Because I couldn't find an aftermarket stereo with high quality output that was better than my stock Pontiac headunit. I also wanted to keep full functionality of my HUD and steering wheel controls. [ Joseph  Feb 18, 2016 ]

12 questions already asked

Will this work on 2020 gmc sierra?Looking to add a sub an amp to factory radio.
[ Matthew  Feb 24, 2020 ]
1 answer
Hi Matthew, thank you for your question. We will be happy to check into this for you. There is some additional information we would need to gather regarding your truck, however. Please chat with an Advisor online or by phone at 1-800-324-9695. We will be happy to help you out!
[ Jess  Mar 18, 2020 ]  Staff
Will this fit my 2007 Chevy Malibu? I've been looking for a way to install bluetooth but can't seem to find anything that's compatible with the factory stereo.
[ Terry  Jan 03, 2020 ]
1 answer
We have not received any answers from other customers on your question. I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They should be able to help answer your question.
[ Calvin  Jan 15, 2020 ]  Staff
Will this work on a 91 Firebird with Delco radio model number 16129912?
[ Zach  Sep 12, 2019 ]
1 answer
That is not he harness we have listed for a 1991 pontiac firebird. Also, the harness we carry are for installing an aftermarket radio. You should reach out to one of out advisors for more personalized help!
[ Calvin  Sep 22, 2019 ]  Staff
what harness will i need for a 2006 pontiac gto.?
[ Rick  Sep 11, 2019 ]
1 answer
I cannot find a bluetooth wiring harness for your GTO. I wish I had different news for you there
[ Paul  Sep 21, 2019 ]  Staff
Will this work with a Chevy trailblazer 2005?
[ Dominick  Aug 05, 2019 ]
1 answer
It does not work in your Trailblazer. I've searched, but cannot find a Bluetooth T harness for your vehicle either. Wish I had different news for you there.
[ Paul  Aug 14, 2019 ]  Staff
Will this fit in a 1997 Chevy Tahoe?
[ Nick  Jun 30, 2019 ]
2 answers
Im sure it will....It fit my 1997 GMC Sierra....and it has only a tape player, not cd option so I assume that GM has similar harnesses across all models for 1997
[ Adam  Jul 01, 2019 ]
[ YVONNE  Jul 01, 2019 ]
will this work with gm's delco radio?
[ Dean  Apr 15, 2019 ]
1 answer
It does work in select 1985 and up GM factory radios. I would need more information about your specific make and model to know for sure. You can connect with one of our friendly product advisors to qualify your vehicle and let you know what options are available for adding Bluetooth. You can reach them here:
[ Cosmo  Apr 22, 2019 ]  Staff
Will this work with any Bluetooth car kit? I have a Motorola T605, will it work?
[ Ginger  Aug 31, 2017 ]
1 answer
No I'm afraid not. This General Motors Bluetooth harness is designed specifically to work with a Parrot hands-free Bluetooth kit (MKi9200, MKi9100, CK3100 & CK3000--sold separately) for integration into select '85-newer GM vehicles. For more details or to discuss further, please feel free to contact an Advisor directly by phone (888.955.6000) or online chat.
[ Larry  Sep 03, 2017 ]  Staff
Is this the harness I need to plug into the dealer option plug and into a genuine GM Bluetooth module in a 09 VE Sportwagon??
[ Keith  Sep 03, 2014 ]
1 answer
For details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle.
[ Krissy  Sep 05, 2014 ]  Staff

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