The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Back-up Lights

Slowclimb · 11-06-2017, 12:37 AM

I've seen comments saying that the SM420 did not get the switch for backup lights until 67.

My 66 has factory backup lights on it so maybe this info is wrong or mine was produced very close to 66 year end.

Also noted the transmission is a good one for the year some say the SM is Saginaw Muncie some say it stands for Syncro Mesh all the stories the internet tells.

11-06-2017, 12:37 AM	#1
Slowclimb Registered User Join Date: Jan 2016 Location: Campbell River B.C. Canada Posts: 53	Back-up Lights I've seen comments saying that the SM420 did not get the switch for backup lights until 67. My 66 has factory backup lights on it so maybe this info is wrong or mine was produced very close to 66 year end. Also noted the transmission is a good one for the year some say the SM is Saginaw Muncie some say it stands for Syncro Mesh all the stories the internet tells.