Do you think it could be a ground wire ?

I have a 2006 Chevy Trailblazer... I'm wanting to replace the OEM bulbs in the cluster for LED. I know that it is a #74 bulb... However could someone please tell me if these will work...

I bought my car since 2 weeks, working excellent except one issue The battery indicator red lamp in the instrument panel always ON When I start the engine, this lamp goes off for 20 sec and return on again The voltage scale of the battery in the instrument panel reads 14.5 I did check on the...