1.Devices That Only Require Power and Ground Connections.

Avoid tying directly into the vehicle's wiring system.

Whenever possible use direct power and ground feeds from the battery or the accessory block stud on vehicles so equipped.

To eliminate voltage spikes do not tie into existing ground connections. Accessories that use low current can be grounded at the left door hinge pillar. Drill a 5.3 mm hole and use a 10 mm head screw p/n 11502704 with star washer p/n 11503663.

Parts are currently available from GMSPO.

Install an in-line fuse holder on the power wire as close to the battery as possible. Only use fuses of the correct amperage as specified by the manufacturer of the addon device.

Twist the lengths of the power and ground wires together, as much as possible to reduce magnetic interference.

Route wires away from all existing harnesses. Pay particular attention to all ECM, ignition, and radio wiring.

If the device must be ignition operated, use the auxiliary ignition jack in the fuse box and install an in-line fuse. In some cases you may have to add a suppression filter (see Delco Service Managers - Sound Guide).