1. Chevrolet Climate Controls & Control Units To Buy
  2. sku: 11641072979468604
  3. DORMAN 58749CXHH

DORMAN 58749CXHH Hvac Control Vacuum Check Valve

fits model: Blazer. make: Chevrolet. year: 1987–2005.

58749cxhh Dorman For 1995-2005 Chevrolet Blazer Hvac Control Vacuum Check Valve

( Brand: Dorman ), ( Manufacturer Part Number: 58749CXHH ), ( Part Type: Hvac Control Vacuum Valve Check ), ( Manufacturer Warranty: 12 Month Warranty ), ( Notes: Hvac Control Vacuum Check Valve ), ( Years: 1998 1987 1997 2001 1995 1988 2003 1996 1999 2000 2002 2004 2005 ), ( Application: Chevrolet Blazer Hvac Control Vacuum Check Valve ), ( Cs-sku: 400 )

Review DORMAN Chevrolet Hvac Control Vacuum Check Valve fits BLAZER 1987–2005

The **Dorman 58749CXHH** is a high-performance **HVAC Control Vacuum Check Valve** meticulously engineered to ensure seamless operation and optimal climate control within **1995 2005 Chevrolet Blazer** models. Designed with precision and durability in mind, this valve serves as a critical component in the vehicle s heating, ventilation, and air conditioning (HVAC) system, regulating airflow and maintaining proper vacuum pressure to prevent leaks and ensure efficient performance. Crafted from high-quality materials, including a robust **metal housing and reinforced elastomeric seals**, this check valve is built to withstand the demands of daily driving, resisting corrosion, heat, and pressure fluctuations that can compromise performance over time. Its **OEM-level specifications** guarantee an exact fit, eliminating the need for modifications or additional adapters, while its **one-way flow design** allows air to pass freely in the correct direction while blocking reverse flow, which helps maintain consistent vacuum levels in the HVAC system. Whether addressing a failing original valve, upgrading for improved reliability, or restoring factory performance after a repair, the Dorman 58749CXHH delivers a dependable solution that enhances both comfort and longevity in your Blazer s climate control system. Its **direct replacement compatibility** and **superior engineering** make it a trusted choice for mechanics and DIY enthusiasts alike, ensuring that your vehicle s HVAC system operates smoothly for years to come.

The **Dorman 58749CXHH** is a vacuum check valve designed for the HVAC control systems in **1995 2005 Chevrolet Blazer** models. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the Dorman 58749CXHH Vacuum Check Valve**

1. **Direct OEM Replacement** Dorman is a trusted aftermarket brand that closely replicates OEM (Original Equipment Manufacturer) parts, ensuring compatibility with the Blazer s HVAC system. This reduces the risk of fitment issues or performance problems.

2. **Reliability** Dorman parts are known for durability and consistent quality. The vacuum check valve is a critical component in the HVAC system, controlling airflow and preventing backpressure, so a reliable part minimizes system failures.

3. **Easy Installation** The valve is designed to be a straightforward replacement, requiring minimal tools and no special expertise. Most users can install it in under an hour, especially if they have basic mechanical skills.

4. **Cost-Effective** Compared to OEM parts, the Dorman valve is significantly cheaper while maintaining high quality. This makes it an attractive option for budget-conscious buyers who still want a dependable part.

5. **Widespread Availability** Dorman parts are sold through major auto parts retailers (AutoZone, O Reilly, RockAuto, etc.), making it easy to purchase without long waits or special ordering.

6. **Compatibility with Aftermarket Upgrades** If you plan to modify your Blazer s HVAC system (e.g., adding a manual climate control kit or upgrading components), this valve is likely to work seamlessly with other aftermarket parts.

7. **Prevents Common HVAC Issues** A faulty vacuum check valve can cause symptoms like weak airflow, strange noises, or the AC not engaging properly. Replacing it with a new Dorman valve can resolve these issues and restore proper system function.

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### **Cons of the Dorman 58749CXHH Vacuum Check Valve**

1. **Potential Counterfeit Concerns** While Dorman itself is legitimate, some sellers (especially online) may carry counterfeit or low-quality knockoffs. Always verify the seller s reputation and check for authenticity markings on the part.

2. **Limited Longevity Compared to OEM** While Dorman parts are durable, they may not last as long as genuine OEM components in high-mileage or heavily used vehicles. However, this is rare and usually only an issue if the part is poorly installed or the system is abused.

3. **No Warranty on Purchase** Unless purchased directly from a retailer with a return policy (e.g., AutoZone s 1-year warranty), there may be no warranty coverage. Always confirm the retailer s return/exchange policy before buying.

4. **Requires Basic HVAC Knowledge** While installation is simple, if the HVAC system has other underlying issues (e.g., a failing compressor clutch, refrigerant leaks, or electrical problems), replacing just the check valve may not fully resolve the problem. Diagnosing the root cause may require additional troubleshooting.

5. **Slightly Higher Price Than Cheap Alternatives** While still affordable, the Dorman valve may cost slightly more than the absolute cheapest generic parts. However, the trade-off in quality is usually worth it.

6. **Risk of Overlooking Other Issues** If the HVAC system has multiple failures (e.g., a failing vacuum motor, clogged filters, or electrical shorts), replacing just the check valve might provide temporary relief but not a permanent fix. A thorough inspection is recommended.

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### **Conclusion**

The **Dorman 58749CXHH vacuum check valve** is an excellent choice for most **1995 2005 Chevrolet Blazer** owners experiencing HVAC control issues. It offers a reliable, cost-effective, and easy-to-install solution that closely matches OEM specifications. The risks are minimal if purchased from a reputable seller and installed correctly, and the benefits such as restored airflow, reduced noise, and prevention of further damage far outweigh the drawbacks.

The only scenarios where you might consider alternatives are:

- If you suspect the issue lies elsewhere in the HVAC system (e.g., vacuum motor, hoses, or electrical components), a full diagnostic may be needed.

- If you re on a tight budget and can t afford even the slightly higher cost of Dorman, you could explore other reputable brands (e.g., **Motorcraft, Carter, or Delphi**), though Dorman is generally the safest bet.

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### **Recommendation**

**Buy the Dorman 58749CXHH vacuum check valve** if:

- You re experiencing symptoms like weak airflow, hissing noises, or the AC not engaging properly.

- You want a direct OEM replacement with high reliability and ease of installation.

- You re purchasing from a trusted retailer (e.g., AutoZone, O Reilly, or RockAuto) to avoid counterfeit parts.

**Before purchasing, verify:**

1. The exact year and trim of your Blazer to ensure compatibility (though Dorman s part number covers the specified range).

2. That no other HVAC components (e.g., vacuum motor, hoses, or electrical connections) are failing.

3. The seller s return policy in case the part doesn t fit or work as expected.

If you re comfortable with basic automotive work, replacing the valve yourself is the most cost-effective approach. If you re unsure, consult a mechanic to confirm the issue before buying. The Dorman part is a **strong, well-supported choice** for this application.

Details:

Restores functionality - this valve is made to fit and fully restore part after the original fails. Parts Geek - For 1995 - 2005 Chevrolet Blazer HVAC Control Vacuum Check Valve Dorman 58749CXHH: Review Fitment Notes to Ensure Proper Fit condition: New Brand: Notes: length : 2.035 in Color/Finish: Black Clear Package Contents: 1 Features: Direct replacement this vacuum check valve is designed match the fit and function of original on specified vehicles. Trustworthy quality - backed by team of product experts in the USA and more than a century automotive experience. Durable construction - this part is made from quality materials to ensure reliable performance and long service life.

12 Month Warranty Fitment Notes: Vehicle: 1995 - 2005 Chevrolet Blazer.

part #: 58749cxhh price

  • $18.44

specifications chvyacheatercontrols:

  • for models: Blazer
  • for makes: Chevrolet
  • for years: 1987-2005
  • brand: Dorman
  • mpn: 58749cxhh
  • part type: Hvac Control Vacuum Valve Check
  • manufacturer warranty: 12 Month Warranty
  • notes: Hvac Control Vacuum Check Valve
  • years: 1998 1987 1997 2001 1995 1988 2003 1996 1999 2000 2002 2004 2005
  • application: Chevrolet Blazer Hvac Control Vacuum Check Valve
  • cs-sku: 400

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

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for models: blazer, for makes: chevrolet, for years: 1987-2005, part type: hvac control vacuum valve check, manufacturer warranty: 12 month warranty, notes: hvac control vacuum check valve, years: 1998 1987 1997 2001 1995 1988 2003 1996 1999 2000 2002 2004 2005, application: chevrolet blazer hvac control vacuum check valve, cs-sku: 400,
category: auto parts > car truck parts accessories > air conditioning heating > hvac controls control units, sku: 11641072979468604,
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  • New. Offer #1 priced at $18.44 + $0.00 shipping estimate = $18.44* total. Color/Finish: Clear. 1995-2005 Chevrolet Blazer.FREE SHIPPING

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