i have a harness & ecm from an o3 van 6.0 / 4l80e im wondering if i can use this in my 2000 siverado? do i have to use an 03 up dash harness should i use it ? its a dbw harness though , i wanted to use this harness to put power doors on my truck anyway dont mind all the work and i already have the parts instead of searching for 00-02 dash harness