DORMAN OE SOLUTIONS SX-6620 Rear Hvac Control Module Kj

( Brand: Dorman Oe Solutions ), ( Manufacturer Part Number: SX-6620 ), ( Manufacturer Warranty: 1 Year / 2 Years / 3 Years / 5 Years Depending On Part ), ( Ipn: C356 41-37 ), ( Item Height: 3.750 ), ( Item Length: 11.250 ), ( Item Weight: 1.3000 ), ( Item Width: 6.250 ), ( Placement On Vehicle: Hvac Control Modules ), ( Compatible Model: Avalanche 2500 ), ( Compatible Year: 2006 2005 ), ( Core Charge: Free No Core Charge ), ( Position: Rear ), ( Type: Hvac Control Module ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Dorman Hvac Control Module )

Review DORMAN OE SOLUTIONS Rear Hvac Control Module Chevrolet Kj fits AVALANCHE 2500 2005–2006

The **Dorman SX-6620 Rear HVAC Control Module** is a high-quality, direct-fit replacement designed specifically for the **2005 2006 Chevrolet Avalanche 2500 KJ**, ensuring seamless integration with your vehicle s rear climate control system. Engineered to meet or exceed OEM specifications, this module provides reliable and precise control over the rear HVAC functions, including temperature regulation, fan speed adjustments, and air distribution settings. Built with durable, long-lasting components, it eliminates common issues such as erratic operation, unresponsive controls, or complete failure of the rear climate system, which can disrupt comfort and convenience during long drives or extended trips. The SX-6620 features a robust wiring harness that connects effortlessly to the factory harness, reducing installation time and minimizing the risk of improper connections. Whether you're dealing with a malfunctioning module that has left your rear cabin feeling uncomfortably warm or cold, or simply looking to upgrade for added reliability, this Dorman module delivers a dependable solution. Its compatibility with the **Chevrolet Avalanche 2500 KJ** ensures that all rear HVAC functions from defrosting to air recirculation operate smoothly, enhancing passenger comfort without compromising performance. With Dorman s reputation for quality and performance, this module is an excellent choice for restoring or maintaining the functionality of your vehicle s rear climate control system.

Buying the **Dorman SX-6620 Rear HVAC Control Module** for a **2005-2006 Chevrolet Avalanche 2500 HD (KJ)** has its advantages and drawbacks, depending on your priorities cost, reliability, compatibility, and ease of installation. Below is a detailed breakdown of the pros and cons, followed by a conclusion and recommendation.

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### **Pros of the Dorman SX-6620 Rear HVAC Control Module**

1. **Direct Replacement Part**

The Dorman SX-6620 is designed as a **direct-fit replacement** for the OEM rear HVAC control module in your Avalanche. This means it should align perfectly with the wiring harness and mounting points without requiring modifications. This reduces the risk of installation errors and ensures a cleaner fit compared to aftermarket parts that may not match up as closely.

2. **Reliability and Durability**

Dorman is a well-known brand under the **Motorcraft** line (owned by Ford but widely trusted in the automotive industry). Their components are generally built to last, with robust materials and quality control standards. This module should function reliably for the life of the vehicle if installed correctly and maintained properly.

3. **Compatibility with Aftermarket Systems**

If you ve upgraded your rear HVAC system (e.g., with a different blower motor, switches, or wiring), the Dorman module may still integrate well with aftermarket components. Its standardized design often works with common HVAC setups, making it a flexible choice.

4. **Warranty Coverage**

Dorman parts typically come with a **limited warranty** (often 12 24 months), which provides some peace of mind in case of defects. This is especially useful if you re unsure about the longevity of the part or if you ve had issues with the original module.

5. **Ease of Installation**

Since it s a direct replacement, the installation process is straightforward for someone with basic mechanical skills. You ll need to disconnect the wiring harness, remove the old module, and install the new one no major modifications are usually required. Dorman also provides wiring diagrams or installation guides to assist.

6. **Cost-Effective Alternative to OEM**

While not as cheap as some no-name brands, the Dorman module is **significantly cheaper than purchasing an OEM replacement** from Chevrolet. For most owners, this represents a reasonable balance between cost and quality.

7. **Support for Common Issues**

Many owners report that the Dorman module resolves **intermittent power issues, dead buttons, or unresponsive controls** in the rear HVAC system. If your original module was failing due to internal wear (e.g., corroded contacts, faulty switches), this part often fixes the problem without needing a full system overhaul.

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### **Cons of the Dorman SX-6620 Rear HVAC Control Module**

1. **Limited Customization**

Unlike some aftermarket modules that offer **programmable or adjustable features**, the Dorman part is a **basic replacement** with no additional functionalities. If you re looking for upgrades (e.g., remote control integration, LED backlighting, or customizable settings), this module won t provide those.

2. **Potential Compatibility Quirks**

While the Dorman is a direct fit, **some users report minor compatibility issues** with certain aftermarket HVAC upgrades or modified wiring. For example:

- If you ve rewired the rear HVAC system for better functionality, the module s stock wiring may not match your setup.

- In rare cases, the module s internal switches or resistors might not align perfectly with non-OEM components, leading to partial functionality or error codes.

Before purchasing, verify that your specific HVAC setup is compatible with the Dorman part.

3. **No Diagnostic Tools Included**

If your original module had **self-diagnostic features** (e.g., trouble codes for HVAC malfunctions), the Dorman replacement may not retain these. You ll need to rely on the vehicle s onboard diagnostics (OBD) or a multimeter to troubleshoot issues, which can be less convenient.

4. **Quality Control Variability**

While Dorman is generally reliable, **there have been occasional reports of defective units** shipped to customers. If you receive a faulty module, returning it under warranty can be a hassle, especially if you ve already installed it. Always check reviews or ask the seller for confirmation of the module s condition before buying.

5. **No Upgrades to Original Features**

If your original module had **unique functionalities** (e.g., a built-in temperature sensor calibration or specific Chevrolet software), the Dorman replacement may not replicate these exactly. While most basic functions (power, fan speed, A/C control) will work, subtle differences in performance or responsiveness might occur.

6. **Dependence on Proper Installation**

If the module isn t installed correctly such as **loose wiring connections, improper grounding, or damaged harnesses** it can lead to **intermittent failures** or complete non-functionality. This requires careful attention during installation, which may not be feasible for those without mechanical experience.

7. **Limited Availability of Spare Parts**

Unlike OEM modules, if the Dorman part fails internally (e.g., a burned-out resistor or faulty switch), **replacing individual components can be difficult**. You may need to source parts from a specialist or consider a full replacement, which isn t always straightforward.

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### **Conclusion**

The **Dorman SX-6620 Rear HVAC Control Module** is a **solid, cost-effective choice** for restoring basic functionality to your 2005-2006 Chevrolet Avalanche 2500 HD s rear HVAC system. It offers **reliability, ease of installation, and compatibility with most stock and lightly modified setups**, making it ideal for owners who need a **direct replacement without major upgrades**.

However, if you re looking for **customization, advanced features, or a fully future-proof solution**, you may need to explore aftermarket alternatives (e.g., **Delco or Motorcraft premium modules**) or consider a full HVAC system overhaul. Additionally, if your original module failed due to **specific wiring issues or software quirks**, the Dorman part might not resolve those without additional troubleshooting.

For the average driver seeking a **budget-friendly, reliable fix** for a non-functioning rear HVAC control module, the Dorman SX-6620 is a **highly recommended option**. Just ensure you:

- Verify compatibility with your specific HVAC setup.

- Follow installation instructions carefully.

- Check for warranty coverage in case of defects.

If you re unsure about installation, consult a professional mechanic to avoid potential pitfalls.

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### **Final Recommendation**

- You need a **direct, reliable replacement** for a failing rear HVAC control module.

- Your HVAC system is **stock or minimally modified**.

- You prioritize **cost-effectiveness and ease of installation**.

- You re comfortable with basic wiring and troubleshooting.

- You ve made **significant aftermarket HVAC modifications** (e.g., custom wiring, non-OEM components).

- You need **advanced features** (e.g., remote control, LED displays).

- You suspect **underlying wiring or electrical issues** that the module alone won t fix.

- You re unable to **properly install or test** the module yourself.

For most cases, the Dorman part will **restore your rear HVAC controls effectively** and is worth the investment for its balance of quality and affordability.

Details:

Dorman Rear HVAC Control Module for 2005 - 2006 Chevrolet Avalanche 2500 kj: Status: In Stock.

part #: sx6620 prices

• $32.58-$146.50

specifications chvyacheatercontrols:

• for models: 2500, Avalanche
• for makes: Chevrolet
• for years: 2005-2006
• brand: Dorman Oe Solutions
• mpn: Sx-6620
• manufacturer warranty: 1 Year / 2 Years / 3 Years / 5 Years Depending On Part
• ipn: C356 41-37
• item height: 3.750
• item length: 11.250
• item weight: 1.3000
• item width: 6.250
• placement on vehicle: Hvac Control Modules
• compatible model: Avalanche 2500
• compatible year: 2006 2005
• core charge: Free No Core Charge
• position: Rear
• type: Hvac Control Module
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine Dorman Hvac Control Module

general chvyacheatercontrols:

• Car Truck Parts Accessories > Air Conditioning Heating > HVAC Controls Control Units
• condition: New

returns chvyacheatercontrols:

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

offer chvyacheatercontrols:

• sold: 0
• started: April 29, 2026
• options: Ship-to-home
• quantity: 1
• availability: In Stock

seller chvyacheatercontrols:

• rating: 99.6%
• city: Indianapolis, Indiana
• # reviews: 651065

payments chvyacheatercontrols:

• credit card: Diners-club
• wallet: Apple-pay
• other

shipping chvyacheatercontrols:

• type: Fixed
• class: Standard, Expedited
• service: Standard, Expedited
• transit: 2-5 Days
• cost: $0.00

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