GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hello, Eddie here and I will do my best to help. Have you tried to replace or repair anything yet to fix this problem? And, you haven't had to add any brake fluid lately have you? So there isn't a leak anywhere that you have noticed?
I follow you, how long has it been since you put front pads on it? and were they quality pads? some of those cheap semi metallic have had issues with.
Alright, If you don't have any ABS light on, it's likely nothing wrong in that system. I would suspect the rotors may be slightly warped causing this problem, or some foreign substance got on the rotors, grease maybe or anything that would make it brake uneven. If you turn the rotors and inspect the pads, sand them or replace them if you see anything wrong with them like they've been hot or if they have any cracks, I would replace them. If you can jack up the front end, make sure both wheels turn freely and no caliper is sticking. I believe that approach will fix it. Let me know if you have any further questions. Thank you.