GM Service Manual Online
For 1990-2009 cars only

Caution: Exposure to intermediate voltage can cause shock and burns. The intermediate voltage systems in the vehicle can only be serviced by technicians with special training.

Intermediate voltage devices are identified by labels. Do not remove, open, take apart, or modify these devices. Intermediate voltage cable or wiring has blue covering. Do not probe, tamper with, cut, or modify intermediate voltage cable or wiring.