1. Exhaust & Emission Parts To Buy
  2. sku: 20057622009020892
  3. CHEVROLET CORVETTE

CHEVROLET 608.GM1Y99 Evaporator Solenoid Line Valve

fits model: C5, Corvette. make: Chevrolet. year: 1999–2004.

608.gm1y99 Chevrolet 1999-04 C5 Corvette Evaporator Solenoid Line And Valve Assembly - Oem

( Model: CORVETTE ), ( Part Type: Line Valve Solenoid ), ( Conditions Options: Evap Solenoid Line Valve ), ( Genuine Oem: Yes ), ( Ipn: 608.gm1y99 )

Review CHEVROLET Evaporator Solenoid Line And Valve Assembly Oem fits CORVETTE C5 1999–2004

The **Chevrolet 608.gm1y99 Evaporator Solenoid Line Valve** (part of the **1999 2004 C5 Corvette** cooling system) is a precision-engineered component designed to regulate airflow within the vehicle s climate control system, ensuring optimal performance of the evaporator core. This solenoid valve operates as part of the **A/C system s refrigerant circuit**, controlling the flow of refrigerant through the evaporator by opening or closing in response to electrical signals from the climate control module. Manufactured to meet General Motors stringent specifications, this valve is constructed from durable materials, including a robust **aluminum or brass housing** and a **high-quality solenoid coil**, which is sealed to prevent moisture ingress and ensure long-term reliability. The internal **needle valve mechanism** allows for precise modulation of refrigerant flow, preventing overcooling or inefficient operation while maintaining consistent temperature control in the passenger cabin. Compatible exclusively with the **C5 Corvette s A/C system** (1999 2004 models with the **608.gm1y99** designation), this valve is critical for preventing refrigerant leaks, maintaining proper system pressure, and supporting the overall efficiency of the air conditioning unit. Whether replacing a failed valve due to electrical failure, mechanical wear, or refrigerant contamination, this component ensures seamless integration with the **GM 608 series evaporator assembly**, delivering reliable climate control for enthusiasts seeking peak performance in their classic sports car. Proper installation requires adherence to GM service procedures, including proper refrigerant charging and system evacuation to avoid future malfunctions.

### **Pros and Cons of Buying a 1999-2004 Chevrolet Corvette (C5) Evaporator Solenoid/Line Valve (Part # 608.GM1Y99)**

#### **Pros:**

1. **Direct OEM Replacement** This is a genuine GM part, ensuring a perfect fit and compatibility with your C5 Corvette s climate control system. It eliminates concerns about aftermarket parts that may not function as intended.

2. **Reliability** Chevrolet s C5 Corvette climate control system is well-designed, and the evaporator solenoid/line valve is a critical component for proper A/C and defrosting operation. A new or high-quality replacement ensures consistent performance without leaks or malfunctions.

3. **Prevents Further Damage** If your current valve is failing, it can lead to refrigerant leaks, reduced cooling efficiency, or even damage to the A/C compressor or condenser. Replacing it now prevents costly repairs down the line.

4. **Improves Comfort** A faulty evaporator solenoid can cause uneven airflow, weak cooling, or complete loss of A/C function. Replacing it restores proper climate control, making your Corvette more comfortable in hot or cold conditions.

5. **Easy Installation** The evaporator solenoid/line valve is relatively accessible in the C5, requiring only basic tools. Many mechanics or even experienced DIYers can replace it in under an hour with proper instructions.

6. **Long-Term Cost Savings** While the part itself has a moderate cost, replacing it early avoids the expense of repairing a damaged A/C system or replacing other related components (e.g., hoses, seals).

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#### **Cons:**

1. **Cost** As an OEM part, the evaporator solenoid/line valve is priced higher than aftermarket alternatives. For a 1999-2004 C5, expect to pay **$100 $200** depending on the seller (new vs. used/refurbished). This may be a significant expense if you re on a tight budget.

2. **Labor Time (If DIY Unfamiliar)** While the part is accessible, if you re not experienced with automotive climate control systems, installation could be tricky. Incorrect handling of refrigerant lines or electrical connections may lead to leaks or electrical issues.

3. **Potential for Counterfeit Parts** If purchasing from an untrusted source (e.g., eBay, Craigslist, or unscrupulous online marketplaces), there s a risk of receiving a fake or low-quality part. Always verify the seller s reputation and part authenticity.

4. **Refrigerant Handling (If Topping Off)** If your A/C system is low on refrigerant, you may need to recharge it after installation. This adds labor cost if done professionally or requires careful DIY handling to avoid overcharging (which can damage the system).

5. **Age of the Vehicle** The C5 Corvette is over 20 years old, meaning other components (e.g., hoses, seals, compressor) may also be worn. Replacing just the solenoid doesn t address underlying issues that could recur soon.

6. **Aftermarket Alternatives May Suffice** While OEM is ideal, high-quality aftermarket solenoid/line valves (e.g., from **Delco, ACDelco, or reputable brands like **Dorman**) often perform just as well at a lower cost. If you re unsure about the part s condition, testing an aftermarket option could be a cost-effective trial.

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### **Conclusion**

Buying the **Chevrolet 608.GM1Y99 evaporator solenoid/line valve** for your 1999-2004 C5 Corvette is a **reliable and recommended choice** if:

- You prioritize **genuine OEM quality** and want to avoid compatibility issues.

- Your A/C system is otherwise in good condition, and this is the only known failing part.

- You re willing to invest in a **long-term fix** rather than a temporary workaround.

- You have access to **proper tools and refrigerant handling** (or are prepared to pay for professional installation).

However, if:

- You re working with a **tight budget**, consider a **high-quality aftermarket alternative** first.

- You re unsure about the **condition of other A/C components**, address those issues simultaneously.

- You re uncomfortable with **DIY refrigerant work**, have a mechanic perform the installation to avoid mistakes.

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### **Final Recommendation**

**Proceed with purchasing the OEM part if:**

You ve confirmed the solenoid/line valve is the root cause of your A/C issues (tested with a multimeter or by comparing with a known-good valve).

You re prepared for the **upfront cost** but want the **most reliable solution**.

You either have experience with A/C repairs or are comfortable having a trusted mechanic install it.

**Consider an aftermarket alternative if:**

You re unsure about the part s necessity and want to test a cheaper option first.

Your budget is limited, and you ve researched reputable aftermarket brands (e.g., **Delco, ACDelco, or Dorman**).

You re also planning to replace other aging A/C components (e.g., hoses, seals) at the same time.

**Additional Tips:**

- **Check for leaks** in the evaporator case or lines before replacing the valve this could indicate a more serious issue.

- **Flush the A/C system** if it s been neglected for years to remove old refrigerant and contaminants.

- **Use R-12 refrigerant** (if your system was originally charged with it) or **R-134a** (if converted), but ensure compatibility with your system s age and condition.

In most cases, **the OEM part is the safest choice**, but weigh the cost against your vehicle s overall condition and priorities. If your Corvette s A/C is critical for daily use, the investment is justified. If it s a secondary concern, an aftermarket part may suffice as a temporary fix.

Details:

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specifications emissyste:

  • for models: C5, Corvette
  • for makes: Chevrolet
  • for years: 1999-2004
  • model: Corvette
  • part type: Line Valve Solenoid
  • conditions options: Evap Solenoid Line Valve
  • genuine oem: Yes
  • ipn: 608.gm1y99

shipping emissyste:

  • cost: $14.95
  • carrier: UPS
  • type: Fixed
  • class: Standard
  • service: UPS Ground
  • transit: 3-10 Days

offer emissyste:

  • availability: In Stock
  • started: February 10, 2026
  • sold: 0
  • quantity: 1
  • options: Ship-to-home

seller emissyste:

  • city: Vancouver, Washington
  • # reviews: 10684
  • rating: 99.7%

general emissyste:

  • condition: Used
  • Car Truck Parts Accessories > Exhaust Emission Systems > EGR Parts Valves

returns emissyste:

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

payments emissyste:

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for models: c5, corvette, for makes: chevrolet, for years: 1999-2004, part type: line valve solenoid, conditions options: evap solenoid line valve, genuine oem: yes,
manufacturer: chevrolet, category: auto parts > car truck parts accessories > exhaust emission systems > egr parts valves, sku: 20057622009020892,
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1 offer $24.47 USD
  • Used. Offer #1 priced at $24.47 + $10.00 shipping estimate = $34.47* total. +$10.00 shipping

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