Gents - Just a note that this topic better belongs in the
Interiors forum, so it has been moved there.
The 1937 GMC did not offer an factory inside review mirror, the 1936 GMC did. Dealer or aftermarket would have been available in 1937
dunfire - I did a little web searching on the topic and saw a couple of early GMC documents that you had posted in the
vccachat that support your above info. Thought it might be worthwhile to share them here for more details on the 1937 GMC topic.
