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**DANTIP** · 01-04-2010, 04:27 PM

The non-lighted Cruise Master under-dash switch has mounting holes on 1 1/2" centers as shown on page 5 of the installation instructions dated 8-13-71. The wider lighted switch (73 and up) cannot be bolted into the 1 1/2" CL holes. The switch shown in the accessory catalog is clearly fastened to a non-truck dash because the switch was used for more than one application. Attached is a photo of a correct non-lighted switch in a 72 (not mine). Most people would not know the difference nor would they care.

I assume the system you have could be easily be installed into a 72 and function properly. We have all seen some "exceptions" to rules regarding these trucks and the 73-up system in a 72 wouldn't be a big problem. I am basing my understanding of these systems on dated GM installation and service materials showing components as well as part numbers.

Your system is VERY nice (I especially like the instruction card)!

01-04-2010, 04:27 PM	#45
DANTIP Registered User Join Date: Sep 2001 Location: Fort Wayne, Indiana, USA Posts: 1,890	Re: Cruise control I.D. The non-lighted Cruise Master under-dash switch has mounting holes on 1 1/2" centers as shown on page 5 of the installation instructions dated 8-13-71. The wider lighted switch (73 and up) cannot be bolted into the 1 1/2" CL holes. The switch shown in the accessory catalog is clearly fastened to a non-truck dash because the switch was used for more than one application. Attached is a photo of a correct non-lighted switch in a 72 (not mine). Most people would not know the difference nor would they care. I assume the system you have could be easily be installed into a 72 and function properly. We have all seen some "exceptions" to rules regarding these trucks and the 73-up system in a 72 wouldn't be a big problem. I am basing my understanding of these systems on dated GM installation and service materials showing components as well as part numbers. Your system is VERY nice (I especially like the instruction card)! Attached Images Last edited by DANTIP; 01-04-2010 at 04:29 PM.