Ive worked in car audio/security for 5 years. This is the type of thing that I always recommmend be done by someone with experience. You can definitely screw your truck up if you mess something up.

Examples of customer screw-ups
- Blown ECU
- Blown Keyless Entry Unit
- Fried Coils
- Bare live wires

Never mind the rats nest of wires they leave behind for a nice fire to happen.