GM Service Manual Online
For 1990-2009 cars only

This vehicle's charging system uses one of the following two Bosch generators.

    • Bosch KCB2 - 105 Amperes - RPO K68
    • Bosch NCB1 - 125 Amperes - RPO KG9

Vehicles without rear air conditioning (RPO C34), and/or heavy duty cooling (RPO V08) are equipped with the KCB2 (105 ampere) generator.

Vehicles equipped with rear air conditioning (RPO C34), and/or heavy duty cooling (RPO V08) require the higher output NCB1 (125 ampere) generator.

The only serviceable components on the Bosch generators are the voltage regulator/brush kit and the generator rear cover.