Originally Posted by Rapid1
This looks like the right place for this question. 2004 silverado, stock radio, using the fast system wiring with a BTA8100. Using the information here, I find that the only thing missing is the blue/white turn on signal. the thing is, there is no wire in the corresponding hole to it in the factory harness.
the radio interface harness part number is fast-2003 with a fast-btah connecting between that and the sub.
do I need a different interface harness?
first post and hey everyone.
There is no switched voltage circuit on the 2004 Silverado radio. You can use the FAST-2003 (or the FAST-9999), however, in either case you will need to run a wire from the blue/white wire of either FAST Harness to the factory fuse box.