This article will be covering the installation of our 1999-2021 GM auto fogs mod for 2003-2007 Chevrolet Silverado / GMC Sierra trucks & SUV's. Once installed, the factory fog lights will turn on automatically any time the park lights come on. This installation requires no additional tools and will take only 5 minutes to complete.

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For in depth installation instructions, reference the links below:

Link to installation video: Automatic Fog Lights - (2003-2007) Silverado Sierra Tahoe Yukon Suburban

Link to technical install document: 2003-2007 GM Auto Fogs Mod

Vehicle Fitment: 2003 2004 2005 2006 GM Chevrolet Silverado, Tahoe, Suburban, Avalanche & GMC Sierra Yukon, Yukon XL, Escalade, 2007 Classic GM Chevrolet Silverado & GMC Sierra

Locate the BCM, which is found under driver side of the dash in the middle. Remove the far left gray connector. To unlock the connector, push the two dark gray tabs towards one another and pull the connector outwards.

Identify the wire in pin location A5 on the gray BCM connector. Based on the dark grey tab being on top. Pin A5 is located in the top row, fifth slot from the right. Wire color may vary between vehicles, therefore, pin locations should be your primary reference.

Utilizing the T-taps provided, attach one to the corresponding wire found in slot A5. Make sure to completely close the T-taps for a proper connection.

Identify the wire in pin location B2 on the gray BCM connector. Based on the blue tab being on top. Pin B2 is located in the top row, second slot from the right. Wire color may vary between vehicles; therefore, pin locations should be your primary reference.

Utilizing the T-taps provided, attach one to the corresponding wire found in slot B2. For additional leverage, pliers can be used to close T-taps.

Once both T-taps are installed, find the blue ring end on the module. The blue ring end needs to be plugged to the wire tapped into pin A5. Proceed to bend the flexible module to connect the other T-tap.

Lastly, reinstall the connector into the BCM. A click sound will be heard confirming the connector has been fully inserted.

For supplemental and full in depth instructions, please reference our Installation Manual or Installation Video listed below. If you have any questions about this product please reach out to our sales team by phone or email here.

Install Video: Automatic Fog Lights - (2003-2007) Silverado Sierra Tahoe Yukon Suburban

Install Manual: 2003-2007 GM Auto Fogs Mod