Best place to buy a factory 85 GN radiator...

[1987GN]

Just a replacement... .

[Jeff]

maybe get original one fixed or try fbody radiator for about 100$ may need minor minor mod such as cutting hose lil shorter

[daveismissing]

I had mine done at a regular rad shop years ago. Nick has someone that does them too

[SuperSix]

There are no "factory" replacements available. It's hard ti find one cheap that fits, and has both the oil and transmission coolers in the stock location, if at all.

There's aftermarket that's close, but over $500.00.

The F-Body replacement is popular ~$100 or so - but no oil cooler. Some run external coolers, or no oil cooler at all.

Exact OEM style replacement:
http://www.amazon.com/Spectra-Premium-CU683-Complete-Chevrolet/dp/B000C7QI8E/

Cheap one w/o oil cooler:
http://www.amazon.com/Ready-Rad-0433571-New-Radiator/dp/B001O7N4QU

[tb3]

I believe there where 2 radiators for the tb's in 85.
first half the year had the shorter ones like in the 84's, second part of 85's had the longer one that is the same length as the 86/87's (along with longer fan shroud).  if its the second half, I'd go the fbody route as mentioned already as it would literally be a drop in replacement (no oil coolers on 85's).
if you have the shorter one, I'd hunt down the larger fan shroud and still do the fbody rad.
if you have the shorter one, they are the same as the rest of the NA regals and a replacement shouldnt be too hard. 
call your local radiator shop.  course those seem to be a dying breed these days

[tb3]

jus remembered. the shorter one would be the same as the 78-87 NA 3.8 regals, cutlass and grand prix.
I think the V8 cars all had the larger rad and shroud that the second half of 85 tb's had