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: 253693949

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 for easy install

Description

❄️ Cool under pressure, built for the bold.

SLEEK DURABLE DESIGN - Machined black exterior blends style with rugged durability—upgrade your rig’s performance and look.
EFFORTLESS INSTALLATION - Pre-drilled mounting brackets make setup a breeze—get back on the road faster.
HEAVY DUTY COMPATIBILITY - Supports GVWR up to 30,000 lbs and towing up to 10,000 lbs—built for serious haulers and adventurers.
OPTIMIZED COOLING EFFICIENCY - Patented internal turbulation maximizes heat transfer while minimizing pressure drop—keep your transmission cooler under pressure.
PERFECT FIT FOR LARGE VEHICLES - Ideal for Class 'A' motorhomes, large travel trailers, and 5th wheels—engineered for your biggest journeys.

The Hayden Automotive 679 Rapid-Cool Plate and Fin Transmission Cooler is a compact, high-performance cooling solution designed for heavy-duty vehicles like Class 'A' motorhomes and large trailers. Featuring patented internal turbulation technology, it enhances heat transfer with minimal pressure loss, ensuring your transmission stays cool during demanding towing up to 10,000 pounds. Its pre-drilled mounting brackets simplify installation, while the sleek black machined exterior offers durability and style.

Specifications

ASIN	B000C3BBKS
Best Sellers Rank	#20,823 in Automotive ( See Top 100 in Automotive ) #4 in Automotive Engine Cooling & Heating Coolers
Brand Name	Hayden Automotive
Connector Type	Through Hole
Contact Material	Brass
Contact Type	Normally Open
Customer Reviews	4.3 4.3 out of 5 stars (23)
Global Trade Identification Number	00036752006793
Included Components	Transmission Cooler
Item Type Name	Transmission Cooler
Item Weight	1.25 kg
Manufacturer	Hayden Automotive
Model	679
Mounting Type	Screw Mount
Operation Mode	Automatic
Part Number	679
UPC	036752006793

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