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โ๏ธ Stay cool, drive bold โ upgrade your rideโs heart with precision power!
The COOLINGBEST CU2423 is a 34-inch, 3-row AA5052 aluminum radiator engineered for 1999-2014 GM V8 trucks including Cadillac Escalade, Chevy Silverado, and GMC Yukon. Offering 30-45% improved cooling efficiency over stock units, it features a direct OEM fit and integrated transmission oil cooler, ensuring durable, high-performance heat management for demanding driving conditions.








| ASIN | B09MT6T9HT |
| Best Sellers Rank | #172,795 in Automotive ( See Top 100 in Automotive ) #279 in Automotive Replacement Engine Radiators |
| Brand | COOLINGBEST |
| Brand Name | COOLINGBEST |
| Cooler Heatsink Compatibility | 1999-2014 Cadillac Escalade, Chevy Silverado, GMC Yukon, etc. |
| Cooler Heatsink Material | Aluminum |
| Customer Reviews | 3.7 out of 5 stars 23 Reviews |
| Included Components | 1 X 3-Row AA5052 Aluminum Radiator |
| Item Dimensions L x W x H | 40.15"L x 21.65"W x 5.31"H |
| Manufacturer | CoolingSun |
| Model | CoolingSun-0440 |
| Mounting Type | Chassis Mount |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | CoolingSun-0440 |
| Product Dimensions | 40.15"L x 21.65"W x 5.31"H |
| UPC | 753684771420 |
| Unit Count | 1 Count |
| Warranty Description | 1 |
J**Y
2006 gmc sierra 1500 crew cab with 5.3
Installed in a 2006 gmc sierra 1500 5.3 crew cab everything worked and no leaks easy installation. Only problem and not really a big problem is the electric fan slip in clips are impossible to make fit right. The electric fans bolt on the top like factory and itโs sits in the bottom of the support anyway and the slide clips arenโt needed. I bent them slightly out the way and itโs been doing great just took a 5 hour trip and it runs cooler than before very please. High quality part will buy again.
J**E
Leaking after 7 months
I purchased this radiator August 2025. I just made a report of it leaking and waiting to hear from the seller. I thought it would last me way longer than 7 month...SMH. Hope they can make this right cause it was too expensive not even last a year.
J**E
Good product, with exceptions.
Im using this on a 2000 Silverado 5.3 swap. Fits as good as OE radiator. However if you have OE Fans which I do, the E fans will have some clearing issues. Primarily the plastic cover that runs horizontally on top and bottom. You can trim it with dremel a couple of centimeters and fits snug. It increases coolant capacity a bit not by much. I am running 165* thermostat and seem to be keeping up at highway speeds. However the reason for 4 is because they seem to offer 1 year warranty, only after doing research did I find out it is another Chinese company, so getting a warranty is probably never going to happen. I'll update if it doesn't hold up the time test.
D**E
I'm CoolerThan Before... ๐
This radiator is 100% cooler than the radiator that freakin GM put in my truck. They put a 1 core radiator in my 2002 Chevy Tahoe and last week my vehicle vapor locked because of extreme heatwave that we had. Now my temperature gauge does not go past 160 while I'm driving. I set my custom electric fans to kick on at 185 when idling in traffic & they cool down to 172. So this 3 core/row radiator is doing a excellent job keeping my motor cool and the air conditioner is even colder now also. Awesome!!! I should've been purchased an aluminum three row radiator... I'm waiting for a heatwave day ๐ฅ to come now. It's early July 2025. I believe HOT, MUGGY, HUMID days are definitely coming too... Functionality: Works superb so far... Look: Awesome aluminum look compared to the factory plastic & aluminum... Fit: Fit is perfect. No complaints.
P**A
Great replacement on Yukon
Bought this radiator, due to my wife's plastic tanks on her OEM radiator cracking. This is on a 2014 GMC Yukon XL with the 5.3l. Great looking radiator out of the box. All the welds look good and absolutely no plastic! I did not use the transmission cooler, as I installed a separate transmission cooler on this truck prior to the radiator going bad. Installed was 30 minutes. Very simple. Everything lined up properly. I did put some Teflon tape on the nut that holds the drain plug before install. I also pre fitted the OEM alignment tabs on the the bottom of the radiator before install. This required a small piece of rubber hose over the existing aluminum tabs to secure a snug fit to the OEM alignment bushings. I also trimmed 1/4 of an inch off of the fan shroud. All in all, a very simple install and a fairly well made product. I've only put roughly 500 miles on this radiator since purchased, so I can not speak for longevity, however there are no leaks and it cools sufficiently.
M**.
Works, but not great
The bracket on the passenger side of the radiator does not bolt up to the front of the vehicle properly, either from being designed incorrectly or from being bent during shipping. the spots where the fan assembly "slips" onto the radiator had to be pried out before I could force the fan assembly to sit in its proper place.
M**E
Good quality
Fits great, looks great, only shaved the bottom of fan off a little but truck has been smashed so probably fine if not. Might keep truck a little too cool if you live in cold places. Michigan has been in 20s and my truck stays at 170 since install.
L**H
Does bot have transmission cooling outlets.
Is not compatible with 2001 gmc sierra 2500
Trustpilot
2 weeks ago
2 weeks ago