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

litew8 · 07-23-2011, 06:24 PM

Steve, you were right.

The number on the frame by the power steering is a partial of the VIN.
It does not specify the Chassis Type, GVW Range or Model Code (hence, not the same scheme).
It does match the second half of the VIN on the glovebox SPID -

1) 1971
2) Janesville production plant
3) Serial Number

What it doesn't specify is the Chassis Type, GVW Range (1/2, 3/4, or 1 ton) or Model Code.
What this tells me = My cab does in fact go with the frame

source: http://outintheshop.com/vin_decode.html

--------------------------------
Next thing to identify - differential.
I know nothing about axle/differentials, only that a 3/4 ton truck of this age should not have a 5 lug axle.
Looks like maybe the differential could be from a 3/4 ton? Not sure, I'll have to investigate when I have time, or someone could respond and save me the trouble?

"GM CORPORATE 12-BOLT
The stronger 12-bolt, with an 8 7/8-inch-diameter ring gear, can be found in various 1964-82 GM 1/2- and 3/4-ton rearends"
source: http://coloradok5.com/axleguide.shtml

07-23-2011, 06:24 PM	#33
litew8 Registered User Join Date: Jul 2011 Location: Des Moines, Iowa Posts: 3,016	Identification Steve, you were right. The number on the frame by the power steering is a partial of the VIN. It does not specify the Chassis Type, GVW Range or Model Code (hence, not the same scheme). It does match the second half of the VIN on the glovebox SPID - 1) 1971 2) Janesville production plant 3) Serial Number What it doesn't specify is the Chassis Type, GVW Range (1/2, 3/4, or 1 ton) or Model Code. What this tells me = My cab does in fact go with the frame source: http://outintheshop.com/vin_decode.html -------------------------------- Next thing to identify - differential. I know nothing about axle/differentials, only that a 3/4 ton truck of this age should not have a 5 lug axle. Looks like maybe the differential could be from a 3/4 ton? Not sure, I'll have to investigate when I have time, or someone could respond and save me the trouble? "GM CORPORATE 12-BOLT The stronger 12-bolt, with an 8 7/8-inch-diameter ring gear, can be found in various 1964-82 GM 1/2- and 3/4-ton rearends" source: http://coloradok5.com/axleguide.shtml __________________ project: "my happy mess"