Tach Question

How Can I Hook Up My Tach From Auto Meter?what Wire Do I Tap In?its Going On My 2000 Silverado

I'd hook it up like this:

Black wire to a good ground.
Red to 12 volt ignition.
White to a 12 volt dash lighting.
Green to Pin 10 white wire on the C2 connector.
Set wire on back of tach as a 4 cylinder - Clip the brown and orange wire and then insulate both ends.

Hope this helps.

Thank You