Chevy GMC Buick Olds Isuzu Saab Radiator

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Product Reviews

This replacement radiator is just what you need to get your vehicle in working order again.


  • Direct replacement
  • Built to strict quality control specifications
  • Engineered for optimum heat-transfer performance and fit
  • 100% tested prior to leaving factory
  • Proper fittings for transmission lines (if needed)

This part is built to strict quality control standards. Makes a great replacement and has substantial cost savings over a dealer unit.

Transmission Cooler Note:

Some radiators are designed to be used on both automatic and manual transmission applications. These radiator may have fittings for an automatic transmission fluid cooler. However these radiators can be used on manual transmission models without issue and require no additional parts or modifications.

Direct Fit Replacement

Core thickness equal to the OE part.  If radiator core is slightly thinner than the OEM, this can decrease overall performance and lifespan.

Premium Aluminum Core

Engineered for top performance.  Provides efficient cooling and heat-transfer.

100% Leak Tested

Built to strict quality control standards.

Item Condition: New

Attention California Customers:

WARNING: Cancer and Reproductive Harm -

Lifetime Warranty

This item is backed by our limited lifetime warranty. In the event this item should fail due to manufacturing defects during intended use, we will replace the part free of charge.


Radiators may incur bent cooling fins or small imperfections during shipping or manufacturing. A few bent fins or small dents and scratches do not affect the fit or the function of the part. Neither our 60 Day satisfaction guarantee, nor the manufacturer's warranty, cover these types of insignificant damages.

4.62/ 5.0
8 reviews
5 Stars
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1 Star
Perfect Fit
This radiator was a exact fit for my 2002 Trailblazer with an I6. It came with the right fittings attached for the transmission lines. I am an at home DIYer and recommend the instructional videos as they are very accurate, informative and well put together. Shipping was very prompt. This is not my first transaction with 1AAuto. I am always very pleased with the service and I will definitely be using for my future vehicle needs.
July 10, 2017
Giving a 2nd chance
I purchased a radiator for a 2002 GMC envoy took everything apart put in the new radiator from 1a auto and what do you know the radiator was leaking instantly from the bottom seal of radiator I couldnt believe it I called in to complain but the policy states they cannot give me any type of compensation only my money back or replace it with another radiator I decided to give him a second chance got the new radiator installed it bought new anti-freeze and transmission fluid so far so good . Ainstall that shouldve Took only a couple hours took over one week
August 17, 2017
Nick Compton
My name is Nick, I bought a radiator from here and it was a great purchase. It delivered very quickly and was very easy to order. I will definitely be ordering from here again.
April 3, 2018
1a auto
My radiator I ordered from 1a auto fit to a T.. I get all my auto parts from 1A Auto because they have great customer service and most items are backed by a lifetime warranty. I have replaced coils,radiator,o2 sensors, camshaft position sensor on my 03 Chevy Trailblazer from 1a auto and probably a lot more just cant name them all as well as my 2000 s 10. Bottom line is for the price and the Value you cant beat 1a auto parts...
October 19, 2018
The radiator worked perfect. I would recommend to anyone
October 25, 2019
2004 Chevy trailblazer radiator 1arad00795
The radiator fit as said. A lot cheaper than local parts stores and free fast shipping was great.
November 15, 2019
2005 Trailblazer Radiator
I purchased the radiator for my Sons 2005 Trailblazer when he advised it was leaking and it didnt look like a hose. We received the radiator 2 days earlier than expected. It arrived in great shape, no noted problems. My Son had brought his Trailblazer in for an oil change and they told him, while changing out his oil they saw the radiator leaking but it turned out to be a hose. They tightened it down and the leak stopped. We are keeping the radiator anyway and plan to install it as a Father/Son project this coming summer.
December 29, 2019
A++ Great product. Timely delivery. BEST price! Thanks
February 3, 2020
Customer Q&A
Ask a question to 1A Auto customers who purchased the product
I installed the radiator no problems, everything is perfect except for the transmission lines. Fluid is leaking from the transmission lines connecting to the radiator. What is going on here, how do i fix this leak?
Dennis W April 2, 2018
I had this very same issue. What I found was the radiator did not have the fittings needed to connect to the cooler lines. You need to use the ones from your old one. I think I also used new o-rings.
A grumpy old man A April 2, 2018
I had the same problem with mine. Did you try to make sure the bolts were tight. Where the transmission lines come to the radiator. Thats exactly what mine was leaking.. after I tighten them up it was fine
Corey T April 2, 2018
The fittings arent threaded into the radiator tight. I connected the push in lines and had the same problem, just tighten them where they thread into the radiator
Lance E April 2, 2018
Make sure the mushroom clips is positioned correctl on the quick connect. Otherwise, the quick connection is not secure.
Larry T April 3, 2018
Install new radiator never had another problem with it
Monroe L April 3, 2018

Fits the following Makes:

Year Make Model Description
2004-2007Buick Rainier Buick Rainier L6 4.2L Radiator
2002-2009Chevy Trailblazer Chevy Trailblazer L6 4.2L Radiator
2002-2006Chevy Trailblazer EXT Chevy Trailblazer EXT L6 4.2L Radiator
2002-2009GMC Envoy GMC Envoy L6 4.2L Radiator
2002-2006GMC Envoy XL GMC Envoy XL L6 4.2L Radiator
2004-2005GMC Envoy XUV GMC Envoy XUV L6 4.2L Radiator
2003-2008Isuzu Ascender Isuzu Ascender L6 4.2L Radiator
2002-2004Oldsmobile Bravada Olds Bravada L6 4.2L Radiator
2005-2009Saab 9-7X Saab 9-7X L6 4.2L Radiator
Part 1ARAD00795
In Stock

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Estimated Arrival Cost

Deliveries made to PO Boxes and FPO may take longer. See our Shipping & Delivery for more information.