2009 Cadillac STS-V Owner's Manual - Page 370

Notice: If you connect a negative cable to the Engine Control Module (ECM), ECM mounting bracket, or any cables that attach to the ECM bracket, you may damage the ECM. Always attach the negative cable to your vehicle's remote negative ground location, instead of the ECM, ECM bracket, or any cables attached to the ECM bracket. { CAUTION: An electric fan can start up even when the engine is not running and can injure you. Keep hands, clothing and tools away from any underhood electric fan. Your vehicle has a remote negative (−) ground location, as shown in the illustration. It is located on the passenger side front shock tower. See Engine Compartment Overview on page 5-12. You should always use this remote ground location, instead of the terminal on the battery. 5-44