29453 Blizzard GM Headlight Adapter Kit H13 to HB3 / H11

Blizzard Adapter Kit # 29453.

This is used on Blizzard Power Hitch 1 plows to adapt a H13 headlight plug to a HB3/H11 headlight. Also comes in kit # 29454.

Some vehicles with HB3/H11 may also need this kit along with kit # 29529, you may need this conversion kit to connect the plow lights to your vehicle lights. This relay disables the low beams when the high beams are engaged on newer trucks that run them together. 

For the installation instructions, check this link.