DORMAN OE SOLUTIONS SX-3656 Automatic Transmission Oil Cooler

( Brand: Dorman Oe Solutions ), ( Type: Automatic Transmission Oil Cooler ), ( Manufacturer Part Number: SX-3656 ), ( Item Width: 7.700 ), ( Item Height: 3.400 ), ( Item Length: 16.200 ), ( Manufacturer Warranty: 1 Year / 2 Years / 3 Years / 5 Years Depending On Part ), ( Ipn: C719 73-27 ), ( Placement On Vehicle: Belts Cooling Radiators Coolers ), ( Compatible Model: Sierra 2500 ), ( Compatible Year: 2004 2003 2002 2001 2000 1999 ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Dorman Automatic Transmission Oil Cooler )

Review DORMAN OE SOLUTIONS Automatic Transmission Oil Cooler Gmc Ln fits SIERRA 2500 1999–2004

Introducing the Dorman SX-3656 Automatic Transmission Oil Cooler, specifically designed for 1999-2004 GMC Sierra 2500 and 2500HLT models. This essential cooling component is an upgrade from the original equipment cooling system, offering enhanced performance and durability.

The Dorman SX-3656 is an automatic transmission oil cooler, which means it is engineered to cool the oil that circulates through your vehicle's automatic transmission. Properly cooling transmission oil is crucial for maintaining optimal performance and longevity of the transmission.

This cooler boasts a robust, tubular construction made of high-quality aluminum. Aluminum is an excellent heat conductor, making it an ideal material for cooling applications. The cooler features a compact, yet efficient design that includes six (6) rows of finned tubing, ensuring maximum cooling capacity.

The SX-3656 comes with all necessary hardware for installation, including mounting brackets, hoses, and clamps. These components are manufactured to OE specifications, ensuring a precise fit and easy installation. Additionally, the cooler is designed to integrate seamlessly with the existing cooling system, making it a hassle-free upgrade.

This Dorman cooler undergoes rigorous testing to meet or exceed OE performance standards. It is backed by a limited lifetime warranty, giving you peace of mind and confidence in your purchase.

In summary, the Dorman SX-3656 Automatic Transmission Oil Cooler is a high-quality, efficient, and durable upgrade for 1999-2004 GMC Sierra 2500 and 2500HLT models. Properly cooling your transmission oil will help ensure your vehicle's automatic transmission maintains optimal performance and longevity.

The Dorman SX-3656 Automatic Transmission Oil Cooler is a potential upgrade for 1999-2004 GMC Sierra 2500 and 2500HLT trucks. This cooler is designed to help maintain optimal transmission temperature and improve the overall performance and longevity of the vehicle's automatic transmission. Here are some pros and cons to consider before making a purchase:

1. Enhanced cooling: The Dorman SX-3656 cooler provides additional cooling capacity to the transmission system, which can help prevent overheating and potential damage caused by high temperatures.

2. Improved performance: By maintaining a consistent transmission temperature, the engine and transmission can operate more efficiently, resulting in improved power delivery and overall performance.

3. Extended transmission life: Proper cooling is crucial for the longevity of an automatic transmission. The Dorman SX-3656 cooler can help ensure the transmission operates within its optimal temperature range, which can lead to a longer lifespan.

4. OEM-style design: The Dorman SX-3656 cooler is designed to fit and function as an original equipment replacement, ensuring a seamless installation process.

1. Cost: The Dorman SX-3656 cooler may be more expensive than a standard replacement cooler, which could be a deterrent for some buyers.

2. Installation complexity: While the installation process is not overly complicated, some users may find it challenging to complete the job themselves, especially if they do not have experience working with cooling systems.

3. Potential for leaks: As with any cooling system component, there is a risk of leaks when installing a new cooler. Proper installation and using a good quality coolant can help minimize this risk.

The Dorman SX-3656 Automatic Transmission Oil Cooler offers several advantages for 1999-2004 GMC Sierra 2500 and 2500HLT trucks, including enhanced cooling, improved performance, and extended transmission life. While the cost and installation complexity may be drawbacks for some buyers, the potential benefits make this an attractive upgrade for those seeking to optimize their vehicle's performance and longevity.

If you are looking to improve your 1999-2004 GMC Sierra 2500 or 2500HLT's transmission cooling and overall performance, the Dorman SX-3656 Automatic Transmission Oil Cooler is a solid choice. Ensure you have the necessary tools and knowledge to complete the installation process or consider hiring a professional to ensure proper installation and minimize the risk of leaks.

part # sx3656 prices

• $21.12-$81.99

specifications motochilled:

• for models: 2500, Sierra
• for makes: Gmc
• for years: 1999-2004
• brand: Dorman Oe Solutions
• type: Automatic Transmission Oil Cooler
• manufacturer part number: SX-3656
• item width: 7.700
• item height: 3.400
• item length: 16.200
• manufacturer warranty: 1 Year / 2 Years / 3 Years / 5 Years Depending On Part
• interchange part number: C719 73-27
• placement on vehicle: Belts Cooling Radiators Coolers
• compatible model: Sierra 2500
• compatible year: 2004 2003 2002 2001 2000 1999
• core charge: Free No Core Charge
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine Dorman Automatic Transmission Oil Cooler

payments motochilled:

• wallet: Paypal
• other
• credit card: Mastercard

returns motochilled:

• paid by: Seller
• time: 30 Days
• policy: Returns Accepted

offer motochilled:

• options: Ship-to-home
• availability: In Stock
• quantity: 2
• started: April 12, 2026
• sold: 0

seller motochilled:

• rating: 99.6%
• # reviews: 644215

shipping motochilled:

• cost: $0.00
• service: Standard, Expedited
• transit: 3-5 Days
• type: Fixed
• class: Standard, Expedited

general motochilled:

• condition: New
• Car Truck Parts Accessories > Engine Cooling Components > Engine Oil Coolers Lines

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