Your 1981 GMC C3500 might be the best vehicle you’ve ever owned. Or you may just be struggling to keep it highway-approved. No matter the situation, Advance Auto Parts has the Radiator product you desperately need.
We currently carry 7 Radiator products to choose from for your 1981 GMC C3500, and our inventory prices range from as little as $207.99 up to $689.99.
On top of low prices, Advance Auto Parts offers 1 different trusted brands of Radiator products for the 1981 GMC C3500. We only sell parts from trusted brands like Carquest Premium so that you can find quality parts you can count on.
Don’t take our word for it - check out customer ratings and reviews to buy with confidence. We have 136 reviews on our Radiator products for the 1981 GMC C3500 from previous customers.
Have parts delivered straight to your home, or find the nearest Advance Auto Parts store to check out our Radiator stock in-person!
Search through our amazing selection of Radiator products for your 1981 GMC C3500 to find exactly what you’re looking for. Compare prices and reviews to choose the best part for you.
Submitted 2021-05-08
By alan
From Undisclosed
it fits
Bottom Line NULL
Submitted 2018-01-26
By Jose
From undisclosed
Radiator was an exact match. Went in without any issues.
Bottom Line NULL
Submitted 2014-12-03
By Dr. Mike
From Gulf Breeze, FL
The website listed this radiator as a direct fit. Upon removing my old radiator from my 1987 chevrolet truck, I discovered that my radiator was 19 inches tall, not the 17 inches that this radiator measured. Also, the mounts on top of the radiator did not match up in regards to their mounts, even if it had been the right height. If you decide to buy one of these, I highly recommend that you measure the core of your existing radiator first, and that you prepare yourself for having to modify the mounting brackets to allow this radiator to fit...... I sent it back to Advance.
Bottom Line not recommended
from $212.99
View ProductSubmitted 2021-08-07
By pete
From Undisclosed
It's a perfect fit.... 1983 Chevy C10 w/305
Bottom Line NULL
Submitted 2021-08-07
By Short box 1983
From Odessa, TX
Perfect fit.... 1983 Chevy C10 w/305
Bottom Line recommended
Submitted 2021-04-29
By Douglas
From Undisclosed
Great replacement for mine which was in bad shape
Bottom Line NULL
from $238.99
View ProductSubmitted 2020-12-17
By Miguel
From Undisclosed
Installed this radiator on a '82 C20. The radiator sits about 1.5" too high for my truck. I had to notch a bit of the aluminum on the radiator, notch the radiator brackets, and remove the urethane mounts and replace with pieces of flat rubber. I expected to make it fit. The unacceptable part is that the radiator does not come with a regular petcock. There is a brass plug installed. I bought a traditional petcock, but I could not remove the plug. It's seized in there. Whoever installed it screwed it too tight, used lock tight or messed the threads up. I did not want to risk cracking the plastic side of the radiator. So I will have to remove the lower hose in order to drain the system in the future.
Bottom Line NULL
Submitted 2020-12-16
By Miguel
From Undisclosed
Installed this radiator on a '82 C20. The radiator sits about 1.5" too high for my truck. I had to notch a bit of the aluminum on the radiator, notch the radiator brackets, and remove the urethane mounts and replace with pieces of flat rubber. I expected to make it fit. The unacceptable part is that the radiator does not come with a regular petcock. There is a brass plug installed. I bought a traditional petcock, but I could not remove the plug. It's seized in there. Whoever installed it screwed it too tight, used lock tight or messed the threads up. I did not want to risk cracking the plastic side of the radiator. So I will have to remove the lower hose in order to drain the system in the future.
Bottom Line NULL
Submitted 2019-12-22
By Ron
From Port orange Fl
Works, truck runs 180°, no leaks. Cools just fine, but core is way thicker than the original in my 90 suburban. The one advance sells that is of the same thickness as mine is only a one row. My original was a 3 row. A one row with my ac running in the florida summer is never going to keep my truck cool enough, so had to get this one. Heavy modifications made to upper core support mounts and the shroud to make it fit. Width and height were the same though.
Bottom Line not recommended
from $301.99
View ProductSubmitted 2016-07-19
By shi
From marietta Ga
Light weight
Bottom Line recommended
Submitted 2012-06-24
By sparkey
From Illinois
easy install
Bottom Line recommended
Submitted 2012-04-21
By Eburg
From Emmitsburg, MD
Nice product for the cost. Not OEm but aluminum and plastic. Appears durable.
Bottom Line recommended
from $361.99
View ProductSubmitted 2021-05-23
By Robert
From Undisclosed
Not as nice as the copper one I took out but it does the job.
Bottom Line NULL
Submitted 2021-05-02
By MARK
From Undisclosed
SO FAR SO GOOD, AS ADVERTISED. 1981 OLDSMOBILE
Bottom Line NULL
Submitted 2021-03-31
By Road Ripper
From Whiting, NJ
1966 Oldsmobile Cutlass with High Performance 455 cid engine. I had a copper/brass 4 core radiator with a 160 degree thermostat. Temperature was always around 160 mark. After 50 years, the radiator started to leak. I was needing a radiator until I could get my old one repaired, so I bought this one core aluminum radiator, (part number 433161), to be a temporary fix. I did have to buy a hose reducer to fit my lower radiator hose onto it, 1 1/3" to 1 1/2" (part number 76950) . Transmission lines are on a separate cooler, so I didn't need them and can't speak to them as far as hooking up, but seems that they would be a direct fit. Make sure you measure everything first. I also replaced the thermostat with a Mr. Gasket 160 degree thermostat, (part number 4363). I can't believe the result! The car now runs at about 150 degrees! This is a one core, plastic tanks/aluminum core radiator that is much, much lighter than the old 4 core and cools much more efficiently. I will now get rid of the 4 core and keep this one! I am very surprised and happy at the result! Also, on a side note, make sure you use a fan shroud to direct air through the radiator. This was one of my biggest problems that was solved years ago when I was first trying to keep the engine from running hot. Fan shrouds are VERY important I found out!
Bottom Line recommended
from $207.99
View ProductSubmitted 2021-11-15
By 1987ChevyV20
From Eustis FL
Replaced my 34 year old radiator with this one. Fits well, cools well. For the price can't beat it. No leaks so far, holding up well.
Bottom Line recommended
Submitted 2021-11-15
By 1987ChevyV20
From Eustis FL
Fit in place of my original 34 year old radiator perfectly. 1987 Chevy 3/4 ton with 5.7 and manual trans. There are two sizes- 17" and 19". Looks like a few other reviews ordered the wrong height. This ones working great so far in my old truck. cooling better than the tired and leaky old one. For the price I'm happy. It fits and works.
Bottom Line recommended
Submitted 2019-06-28
By DISAPPOINTED!!
From Ohio
Has plastic tanks. These are complete trash...everyone knows this. Advertised as meeting or exceeding OEM specs. Well OEM specs on my 1987 GMC 1500 truck was for a radiator that has metal tanks on it. So you're basically getting deceived on one hand and lied to (by omission) on the other. Now I have to pay $$$ to return this junk. Absolutely NEVER buy parts online unless you're ready for some surprises. And the radiator hose I bought from them was thinner and softer and flimsy'er than the one I was intending to replace....and absolutely no internal support for such a cheaply made hose. 1 Year (chump worthy) warranty. Pathetic....garbage. I'll never buy their FLIPPO-JIPPO junk parts again!!!! Beware buying online.....I bought their best (HD) and it's the cheapest quality trash I've ever seen....EVER! Geeze.....
Bottom Line not recommended
from $216.99
View ProductSubmitted 2021-11-10
By Paul
From Flushing, MI
Replaced PSP on a 07 Saturn Aura. Perfect fit and zero leaks.
Bottom Line recommended
Submitted 2021-07-18
By matt
From Va
Worked good
Bottom Line recommended
Submitted 2020-10-28
By Ubaldo
From Undisclosed
Ok
Bottom Line NULL
from $689.99
View Product