Radiator - Pacific Best Inc. Compatible/Replacement for 13017 08-08 Hummer H3 5.3L Engine - Plastic Tank, Aluminum Core

2008 H3 Alpha 5.3L if you are looking for replacement Radiator for H3 Alpha. Stop looking this is it. Perfect fit and works great.

Runs slightly warmer, but a perfect fit.

I ordered this Radiator three days ago received it to today September 16-2025. The three stars are because right out of the box there's a good size dent look at photos, but I can see it's well built so I installed it in my Hummer H 3 fits perfectly let truck run for 40 minutes with heater on got all the air out of the system and it's keeping the temperature gage less than half way great but l will wait to see if it holds up if so I will change my rating.

Awesome product! Fit exact and is performing well. Keeping the engine temp well within normal operating range. Why spend excessive amounts of money on an "all aluminum" radiator when this one can perform just as well for a fraction of the cost! You wont be disappointed!!! Great choice for the Hummer H3!!

My mechanic had no complaints so I assume it was a quality radiator. It was installed about a month ago in my H3 Hummer.