1. Chevrolet Climate Controls & Control Units To Buy
  2. sku: 11663576089568604
  3. AC DELCO 36474VQMZ

AC DELCO 36474VQMZ Control Relay A/c

fits model: 3500, Silverado. make: Chevrolet. year: 2001–2006.

36474vqmz Ac Delco For 2001-2006 Chevrolet Silverado 3500 A/c Control Relay 2002

( Brand: Ac Delco ), ( Manufacturer Part Number: 36474VQMZ ), ( Part Type: Control ), ( Manufacturer Warranty: 12 Month Warranty ), ( Notes: Gold ), ( Years: 2001 2002 2003 2004 2005 2006 ), ( Application: Chevrolet Silverado 3500 A/c Control Relay ), ( Cs-sku: 400 )

Review AC DELCO Chevrolet A/c Control Relay fits SILVERADO 3500 2001–2006

The **AC Delco 36474VQMZ** is a high-quality, direct-fit **air conditioning control relay** specifically engineered to restore optimal performance to the climate control system in **2001 2006 Chevrolet Silverado 3500 HD** trucks equipped with the **2002 model-year configuration**. This relay serves as a critical electrical switch within the vehicle s HVAC circuit, ensuring seamless communication between the climate control module and the A/C compressor clutch, allowing for smooth activation and deactivation of the cooling system. Crafted from durable, corrosion-resistant materials, the **AC Delco 36474VQMZ** is designed to withstand the demanding conditions of heavy-duty truck applications, providing reliable operation even under prolonged use or in extreme environmental conditions. Its precision-engineered contacts minimize electrical resistance, reducing the risk of overheating and ensuring consistent power delivery to the compressor clutch, which is essential for maintaining efficient cooling performance. Beyond its robust construction, this relay incorporates advanced internal circuitry to prevent electrical surges and voltage spikes, protecting both the relay itself and the vehicle s electrical system from potential damage. Installation is straightforward, as it is a **direct replacement** for the original factory relay, requiring no modifications to wiring or harnesses, making it an ideal choice for DIY mechanics and professional technicians alike. Whether addressing a malfunctioning A/C system, replacing a failed relay, or upgrading for enhanced reliability, the **AC Delco 36474VQMZ** delivers the performance and durability expected from a trusted OEM-quality component, ensuring your Silverado s climate control operates with precision and efficiency.

### **Pros and Cons of buying a AC Delco 36474VQMZ Relay for a 2001-2006 Chevrolet Silverado 3500**

#### **Pros:**

1. **Direct Fitment** The AC Delco 36474VQMZ is specifically designed for the 2001-2006 Chevrolet Silverado 3500 series, ensuring compatibility without modifications. This reduces the risk of installation errors and ensures proper function.

2. **Brand Reliability** AC Delco is a trusted OEM (Original Equipment Manufacturer) brand, meaning it meets the same quality standards as parts used in factory-installed systems. This generally translates to better durability and performance compared to aftermarket knockoffs.

3. **Warranty Coverage** AC Delco parts often come with manufacturer warranties, providing some level of protection against defects. This can be reassuring if the relay fails shortly after purchase.

4. **Easy Replacement** Relays are simple components to replace, typically requiring only basic tools. The 36474VQMZ is a standard relay size, making it straightforward to install even for DIYers with limited experience.

5. **Prevents Further Damage** A faulty A/C relay can cause intermittent or complete failure of the air conditioning system. Replacing it promptly can prevent additional wear on the compressor clutch or other related components.

6. **Cost-Effective Solution** Compared to the cost of diagnosing a failing A/C system or replacing the entire compressor clutch, a relay replacement is a low-cost fix. Prices are generally reasonable, especially when purchased from reputable retailers.

7. **No Specialized Tools Needed** Unlike some automotive repairs, replacing a relay does not require specialized equipment. Most mechanics and even inexperienced drivers can handle the job in under an hour.

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#### **Cons:**

1. **Potential Counterfeit Parts** While AC Delco is a reputable brand, counterfeit or low-quality replicas may sometimes appear on third-party marketplaces. Buying from unauthorized sellers increases the risk of receiving a faulty or non-genuine part.

2. **Misdiagnosis Risk** If the A/C system is failing for reasons other than the relay (e.g., low refrigerant, faulty compressor clutch, or electrical issues), replacing just the relay may not resolve the problem. A thorough diagnosis is essential before purchasing.

3. **Limited Lifespan** Relays are generally durable, but they can wear out over time, especially in vehicles with frequent A/C use or electrical fluctuations. The 36474VQMZ may not last indefinitely, though it should function reliably for years if the vehicle s electrical system is healthy.

4. **Price Variability** While the relay itself is affordable, prices can vary significantly depending on the retailer. Some online marketplaces or used parts stores may sell it at a premium, while others may offer discounts. Researching prices beforehand helps avoid overpaying.

5. **Installation Challenges (Rare)** In some vehicles, relays may be located in tight or hard-to-reach areas, requiring careful handling. While uncommon for this specific relay, improper handling during installation could damage surrounding components.

6. **No Guarantee of Immediate Fix** If the relay is partially faulty or if there are underlying electrical issues (e.g., corroded connections, blown fuses), replacing it may not immediately restore full A/C function. Additional troubleshooting may be needed.

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### **Conclusion:**

The **AC Delco 36474VQMZ relay** is a **reliable, cost-effective, and easy-to-install solution** for fixing A/C relay issues in the 2001-2006 Chevrolet Silverado 3500. Its OEM quality, direct fitment, and low cost make it a strong choice for most drivers. However, it is **not a universal fix** it must be confirmed that the relay is indeed the source of the problem before purchasing. Additionally, buying from **authorized dealers or reputable retailers** (such as RockAuto, Amazon, or local auto parts stores) minimizes the risk of counterfeit parts.

If the A/C system still fails after replacement, further diagnosis (e.g., checking fuses, refrigerant levels, or the compressor clutch) is necessary. For most cases, this relay is a **safe and practical choice**, especially for those comfortable with basic automotive repairs.

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### **Recommendation:**

- **Buy from a trusted source** (e.g., RockAuto, AutoZone, or a local dealer) to ensure authenticity.

- **Verify the relay is the issue** by testing it with a multimeter or swapping it with a known-good relay (if available).

- **Replace any accompanying fuses or corroded connections** during installation to prevent future problems.

- **Consider professional installation** if unsure about the process, especially if the relay is located in a difficult-to-reach area.

- **Monitor the A/C system post-replacement** to confirm the fix works. If issues persist, consult a mechanic for deeper diagnostics.

For the average driver, the **AC Delco 36474VQMZ relay is a sound investment** and a logical first step in troubleshooting A/C relay-related problems.

Details:

Fitment Notes: Vehicle: 2001 - 2006 Chevrolet Silverado 3500. Fitment Notes: Anti Theft, Vehicle: Sub model: Body: 2001 - 2003 Chevrolet Silverado 350, 3500BaseCrew Cab Pickup, 3500BaseExtended 3500LSCrew 3500LSExtended 3500Standard Pickup. Fitment Notes: Rear Defogger, Vehicle: Sub model: Body: 2006 Chevrolet Silverado 3500Extended Cab Pickup, 3500Crew 2004 3500WTCrew 3500WTExtended 2001 - 2006 3500Standard 2001 - 2005 3500LSCrew 3500LSExtended 350, 3500BaseCrew 3500BaseExtended Pickup. Parts Geek - For 2001 - 2006 Chevrolet Silverado 3500 A/C Control Relay AC Delco 36474VQMZ 2002: Review Fitment Notes to Ensure Proper Fit condition: New Brand: Notes: Gold 12 Month Warranty Ignition, Vehicle: Sub model: Body: 2006 3500Extended Cab Pickup, 3500Crew 2004 3500WTExtended 3500WTCrew 3500Standard 2001 - 2005 3500BaseExtended 3500LSCrew 3500LSExtended 350, 3500BaseCrew Pickup.

part #: 36474vqmz price

  • $23.19

specifications chvyacheatercontrols:

  • for models: 3500, Silverado
  • for makes: Chevrolet
  • for years: 2001-2006
  • brand: Ac Delco
  • mpn: 36474vqmz
  • part type: Control
  • manufacturer warranty: 12 Month Warranty
  • notes: Gold
  • years: 2001 2002 2003 2004 2005 2006
  • application: Chevrolet Silverado 3500 A/c Control Relay
  • cs-sku: 400

shipping chvyAcheatercontrols:

  • cost: $0.00
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general chvyAcheatercontrols:

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

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offer chvyAcheatercontrols:

  • quantity: 1
  • started: April 18, 2026
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for models: 3500, silverado, for makes: chevrolet, for years: 2001-2006, part type: control, manufacturer warranty: 12 month warranty, notes: gold, years: 2001 2002 2003 2004 2005 2006, application: chevrolet silverado 3500 a/c control relay, cs-sku: 400,
category: auto parts > car truck parts accessories > air conditioning heating > hvac controls control units, sku: 11663576089568604,
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  • New. Offer #1 priced at $23.19 + $0.00 shipping estimate = $23.19* total. 2004 Chevrolet Silverado 3500 WT Crew Cab Pickup. 2006 Chevrolet Silverado 3500 Extended Cab Pickup.FREE SHIPPING

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