![I am having a problem with my Blazer's 4x4. When I press the 4 switch the 4 light blinks, I hear a click from the TCCM I am having a problem with my Blazer's 4x4. When I press the 4 switch the 4 light blinks, I hear a click from the TCCM](https://www.justanswer.com/uploads/GMGreatWrench/2008-11-20_032818_4x4_switch.gif)
I am having a problem with my Blazer's 4x4. When I press the 4 switch the 4 light blinks, I hear a click from the TCCM
![GO-PARTS Replacement for 1998 - 2004 Chevrolet Blazer Front Headlight Assembly Housing / Lens / Cover - Left (Driver) Side 16526217 GM2502172 Replacement For Chevrolet Blazer - Walmart.com GO-PARTS Replacement for 1998 - 2004 Chevrolet Blazer Front Headlight Assembly Housing / Lens / Cover - Left (Driver) Side 16526217 GM2502172 Replacement For Chevrolet Blazer - Walmart.com](https://i5.walmartimages.com/asr/870af5c5-faaf-4767-ae5b-e423836bd493_1.e2c4a0adf8668596eec9bc0373794f28.jpeg?odnHeight=612&odnWidth=612&odnBg=FFFFFF)
GO-PARTS Replacement for 1998 - 2004 Chevrolet Blazer Front Headlight Assembly Housing / Lens / Cover - Left (Driver) Side 16526217 GM2502172 Replacement For Chevrolet Blazer - Walmart.com
![1988-98 Chevy and GMC C/K 1500/2500/3500 Pickup Trucks, Blazer, Tahoe, Suburban, and Yukon On-Board Diagnostic System and Trouble Codes | Haynes Manuals 1988-98 Chevy and GMC C/K 1500/2500/3500 Pickup Trucks, Blazer, Tahoe, Suburban, and Yukon On-Board Diagnostic System and Trouble Codes | Haynes Manuals](https://haynes.com/en-us/sites/default/files/styles/opengraph/public/Chevy%20C1500%20Digital.jpg?itok=f2zY6I_A)