The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Manual Trans Electrical Switch Identification Help?

Longhorn Man · 08-11-2009, 11:25 PM

the back up light is the one on the side if I am not mistaken. The other one is part of an early smog control deal, TCS transmision Controlled Spark. It would prevent the Vac Advance on the dist to work unless you were in top gear and engine warmed up.

08-11-2009, 11:25 PM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: Manual Trans Electrical Switch Identification Help? the back up light is the one on the side if I am not mistaken. The other one is part of an early smog control deal, TCS transmision Controlled Spark. It would prevent the Vac Advance on the dist to work unless you were in top gear and engine warmed up.