A diagnostic test is required to find out the cause of the light coming on. You could have a faulty wheel sensor, sensor indicator ring, or a problem with the module or pump that controls the anti lock brake system.
https://repairpal.com/directory?address=72501&car_brand_names=GMC Click that link to find some shops near you that will be able to help.
https://repairpal.com/estimator?car_type_id=6757 Click that link to find an estimate of what that test may cost.
Any other questions we can answer for you? Good luck!
1) Drive vehicle to closest qualified shop 2)Let shop diagnose the problem. 3)When the shop calls you with an estimate, authorize the repair. 4)When the shop calls you and tells you the car is ready, go pick it up, pay the bill, say thank you, and drive away.