High Intensity Discharge Headlamp Ballast Replacement

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: HID Headlamp Ballast

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
CAUTION: The high intensity discharge system produces high voltage and current. In order to reduce the risk of severe shocks and burns, the battery negative cable must be disconnected any time service work is being performed on or around the high intensity discharge system. CAUTION: The high intensity discharge system produces high voltage and current. To reduce the risk of severe shocks and burns: Never open the high intensity discharge system ballast or the arc tube assembly starter. Never probe between the high intensity discharge system ballast output connector and the arc tube assembly. NOTE: Refer to Fastener Notice . Preliminary Procedure: Remove the HID headlamp assembly. Refer to High Intensity Discharge Headlamp Replacement .
1	Headlamp Ballast Assembly Screws (Qty: 3) Tighten: 3 N.m (27 lb in)
2	Headlamp Ballast Assembly Tip: Pull the ballast downward away from the bottom of the lamp assembly in order to disconnect the electrical connection.