The alternator may fail causing the battery to go dead. The charge light on the dash may or may not illuminate. The alternator may also develop an abnormal noise. A failed alternator will require replacement.
Car Problem Reports
GMC Suburban 1500 Alternator May Fail and Cause Noise and Dead Battery
GMC Suburban 1500 Problem
Engines Affected: 5.7L V8, Gasoline
Visitor, 1999 GMC Suburban 1500, 5.7L V8, 156,000 mi
Alternator went bad and was replaced. Second alternator went bad within 1 month. Erratic charging on the system. Possible short. Problem still not resolved.