GM Service Manual Online
For 1990-2009 cars only

Generator noise may be caused by the following conditions:

    â€¢ A loose drive pulley
    â€¢ Loose mounting bolts
    â€¢ Worn or dirty bearings
    â€¢ A worn stator
    â€¢ A worn rectifier bridge

If the pulley and the mounting bolts are snug and the noise continues, remove the generator for replacement or for inspection and repair. Refer to Generator Replacement .

Do not disassemble the CS-130 generator. Separating the end frames will damage the slip ring end bearings.