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 Vandura 2500 Alternator May Fail and Cause Noise and Dead Battery
GMC Vandura 2500 Problem
Engines Affected: 4.3L V6, 5.7L V8
Average Mileage: 244,000 mi (99,000 mi - 372,000 mi)
Visitor, 1992 GMC Vandura 2500, 4.3L V6, 99,000 mi
Just stopped in a pouring rain. AAA towed it to our garage, they replaced the alternator and installed a new battery.
Visitor, 1992 GMC Vandura 2500, 5.7L V8, 330,000 mi
keeps eating alternators and tension pulley brackets. notsure what else to do ..Has been super reliable up to now.