The light under the speedo is the hi-beam indicator, the one under the blank is for the factory turn signal indicator.
At least thats how it is on my '57.
"Do not walk behind me, for I may not lead. Do not walk ahead of me, for I may not follow. Do not walk beside me either. Just leave me alone, you're starting to freak me out."
1957 GMC 150
| 
