Is fit on 2007 gmc 2500 hd?

I believe so, buy the additional radiator fitting. Also don’t like mounting to the condenser coil, made my own brackets.

I have a '04 chevy trailblazer 4.2 i6 4wd with factory trans cooler. looking to upgrade to pull travel trailer. is there anything else i need?

I would leave the factory trans cooler in place and add the Hayden trans cooler in line if at all possible, especially if the factory cooler is a plate and fin cooler. It will give you that much more extra cooling.

Did you bypass stock trans cooler on 4runner?

I did it on a Nissan Rogue s , am using both now , but planning on by pass it when I hit the 100 k miles ‘cause usual failure of stock oil cooler and don’t want to get any water in tranny. Hope it helps .

Will the provided adapter fitting thread into my radiator on my 2003 gmc sierra 4.8?

It comes with a fitting, I’m not sure if it’s universal. I spliced mine into the existing hoses deleting the OEM cooler.

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Hayden Automotive 679 Rapid-Cool Plate and Fin Transmission Cooler, Black, 11 Inch

Hayden Automotive 679 Rapid-Cool Plate and Fin Transmission Cooler, Black, 11 Inch

Product ID: 180949332

Details

Brand
Hayden
Connector type
Through Hole
Contact material
Brass
Contact type
Normally Open
Mounting type
Screw Mount

📏Compact 11-inch size

🔥Patented turbulation tech

🔧Pre-drilled brackets

Description

❄️ Stay Cool, Tow Strong – Upgrade Your Transmission Game!

COMPLETE COOLING KIT - Includes cooler, hose, and mounting hardware for an all-in-one upgrade.
EFFORTLESS INSTALLATION - Pre-drilled mounting brackets and 19mm hose barb fittings make setup a breeze.
HEAVY DUTY COMPATIBILITY - Supports Class A motorhomes and trailers up to 30,000 lbs GVWR and 10,000 lbs towing.
NEXT LEVEL HEAT TRANSFER - Patented internal turbulation maximizes cooling efficiency with minimal pressure loss.
PRECISION COMPACT DESIGN - Sleek 11-inch plate and fin cooler fits seamlessly in tight engine bays.

The Hayden Automotive 679 Rapid-Cool Transmission Cooler is a compact, high-performance plate and fin cooler designed for heavy-duty towing and motorhome applications. Featuring patented internal turbulation technology, it enhances heat transfer while minimizing pressure drop. With pre-drilled mounting brackets and included hardware, installation is quick and secure. Compatible with OEM systems and built to handle up to 30,000 lbs GVWR and 10,000 lbs towing, this cooler ensures your transmission stays cool under pressure.

Specifications

ASIN	B000C3BBKS
Best Sellers Rank	724,589 in Automotive ( See Top 100 in Automotive ) 6,133 in Car Drive & Transmission
Brand	Hayden Automotive
Connector Type	Through Hole
Contact Material	Brass
Contact Type	Normally Open
Customer Reviews	5.0 5.0 out of 5 stars (1)
Global Trade Identification Number	00036752006793
Item Weight	2.75 Pounds
Manufacturer	Hayden Automotive
Manufacturer Part Number	679
Model Number	679
Mounting Type	Screw Mount
Operation Mode	Automatic
UPC	036752006793

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