2011 GMC Sierra 1500 windshield wipers

[Kyle6983]

So I try to use my wipers and sometimes it will go through a cycle and sometimes it stops mid cycle. The wipers do work at times but it's all the same speed.......slow. I dont k how if it's the motor or if it's something else I need help!!!!!! If it helps i can see my lights flicker to a dim everytime I try to use them.