If your brakes are truly "stuck" and calipers are sticking, this is a serious matter, as overheating and loss of braking power can occur. The vibration would be due to overheating and warping of brake rotor discs. You need to have a professional inspect and diagnose your brake system; this is a major safety issue.
RepairPal Certified shops can diagnose and repair your 1995 Chevrolet G30. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
