is it a gbody or abody

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MrSony

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Nov 15, 2014
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Technically, it's still an A body from 78-80. It's when the downsizing happened. The platform was renamed "GM G Platform" in 1981, and all the cars got "bigger". Frames are the same, all suspension parts are the same, just outer body panels are different. Very little changed from 81-88 for the G body cars. I do know some small electrical parts like HVAC stuff, interior controls, etc are different. But things like wiring are largely the same, if in different locations.
 
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pagrunt

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Sep 14, 2014
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By year it is an A-body ('78-'81 production years), for common reference it is a G-body (as GM called '82-'87/'88 production years). Outside of feature specific most electrical parts will interchange
 

fleming442

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Dec 26, 2013
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I believe there was an electrical change around 84 or 85; just do your due diligence before making any rash decisions (usually doesn't follow own advice!).
 
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oxide80

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Sep 10, 2016
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"A" bodys use standard fasteners, "G" body use metric of I remember correctly.
 
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oldolds

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May 17, 2017
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pine city/rosaila washington
thanks for the information. my 1980 old shop manual showed up. it is amazing what you find when you clean thigs up. i also found a 1984 shop manual (two in a set) if anyone needs them. one of the main difference is 1980 is not computerized, not sure when they switched.
 
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69hurstolds

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Jan 2, 2006
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Although technically the A-body was up through 1981, and the G-body started in 1982, they are usually considered A/G bodies or commonly tossed in the entire "G-body" group from 78-88 because of their similarities.

Most of the time you'll see the generation simply referred to as 78-88 Cutlass. SAE and Metrics were a dividing point, but there were still some SAE usage on the 82-88s (mostly engine fasteners).

Notchbacks get more love for some reason. The 78-79 "Buttless Cutlass" was not a favorite of many, although there is a following for them. And that was also the platform for the 442. Could you imagine a buttless Hurst/Olds?
 
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