GPD 35945TYTJ Control Relay A/c 5.3L V8

( Brand: Gpd ), ( Manufacturer Part Number: 35945TYTJ ), ( Part Type: Control ), ( Manufacturer Warranty: 12 Month Warranty ), ( Notes: A/c Compressor Control Relay Compressor Relay; Black 5-way . ), ( Years: 2004 2005 ), ( Application: Chevrolet Express 3500 A/c Control Relay ), ( Product Name 2: A/c Compressor Control Relay ), ( Cs-sku: 400 )

Review GPD Chevrolet Express A/c Control Relay 5.3l V8 fits 3500 2004–2005

The **Genuine Parts Depot (GPD) 35945TYTJ** is a high-quality, direct-fit **A/C Control Relay** specifically engineered for the **2004-2005 Chevrolet 3500 HD Series** trucks equipped with the **5.3L Vortec V8 engine**. This relay serves as a critical electrical switch within the vehicle s air conditioning system, ensuring proper communication between the climate control module and the A/C compressor clutch, allowing for seamless activation and deactivation of the cooling function. Crafted from durable, corrosion-resistant materials, this relay is designed to withstand the demanding conditions of heavy-duty truck applications, providing reliable performance under varying temperatures and electrical loads. Its precise internal wiring and robust construction prevent common issues such as intermittent A/C failure, blown fuses, or erratic compressor engagement, which are often caused by faulty or low-quality relays. The **GPD 35945TYTJ** is a direct replacement for the OEM (Original Equipment Manufacturer) component, ensuring an exact fit with no modifications required, making it an ideal choice for both professional mechanics and DIY enthusiasts seeking long-lasting reliability. By maintaining optimal electrical flow and protecting the system from voltage spikes, this relay helps preserve the longevity of the entire A/C unit while delivering consistent cooling performance. Whether replacing a worn-out relay or upgrading to a more dependable part, this GPD relay offers a cost-effective solution that aligns with the performance expectations of the Chevrolet 3500 s robust powertrain.

The **GPD 35945TYTJ** is a replacement A/C control relay for the 2004 2005 Chevrolet 3500 HD with a 5.3L V8 engine. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the GPD 35945TYTJ Relay**

1. **Direct Fitment** This relay is specifically designed for the 2004 2005 Chevrolet 3500 HD (and related GM trucks like the Silverado) with the 5.3L V8. It matches the original equipment manufacturer (OEM) pinout and mounting configuration, reducing the risk of installation errors.

2. **Reliable Brand** GPD (General Parts Depot) is a reputable aftermarket supplier known for producing high-quality, OEM-compatible parts. Their relays are often built to withstand typical electrical loads without overheating or failing prematurely.

3. **Cost-Effective** Compared to OEM relays, this aftermarket part is significantly cheaper while maintaining comparable performance. It s a practical solution for budget-conscious buyers who still want a reliable replacement.

4. **Easy Installation** The relay is straightforward to install, requiring only basic tools. Most users can replace it without professional help, saving labor costs.

5. **Compatibility with Aftermarket A/C Systems** If you re upgrading your A/C system (e.g., adding a high-performance compressor or aftermarket controls), this relay is likely compatible with common aftermarket components.

6. **Warranty Coverage** GPD typically offers a warranty (usually 1 2 years) on their relays, providing some peace of mind against early failure.

7. **Common Availability** This part is widely stocked by online retailers (Amazon, RockAuto, eBay, etc.) and local auto parts stores, making it easy to source.

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### **Cons of the GPD 35945TYTJ Relay**

1. **Potential Quality Variability** While GPD is a trusted brand, there is a slight risk of receiving a counterfeit or lower-quality relay if purchased from untrusted sellers (e.g., third-party Amazon sellers or unknown eBay vendors). Always buy from authorized dealers or well-reviewed retailers.

2. **No OEM Build Quality** Unlike a genuine GM relay, this is an aftermarket part. While it should function adequately, it may not have the same durability as an OEM component under extreme conditions (e.g., frequent A/C cycling or high ambient temperatures).

3. **Limited Longevity in Harsh Environments** If your truck operates in extreme heat or has a poorly maintained electrical system, the relay might wear out faster than an OEM part. However, this is true of most aftermarket relays.

4. **No Diagnostic Features** Unlike some high-end aftermarket relays, this part does not include built-in diagnostics or smart features. It s a basic relay with no additional functionality beyond switching the A/C circuit.

5. **Possible Pinout Confusion** While the GPD relay is designed for your specific application, there is a small chance of misalignment if the wiring harness is damaged or if the original relay s mounting bracket is corroded. Always double-check the pinout before installation.

6. **Not a Permanent Fix for Underlying Issues** If your A/C system has deeper problems (e.g., faulty compressor clutch, blown fuses, or wiring issues), replacing just the relay may not resolve the problem. A thorough diagnosis is recommended.

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### **Conclusion**

The **GPD 35945TYTJ relay** is a solid, cost-effective choice for replacing a faulty A/C control relay in your 2004 2005 Chevrolet 3500 HD with a 5.3L V8. It offers direct fitment, reliability, and ease of installation while being significantly cheaper than OEM parts. However, it is not an OEM-level component, so it may not last as long in extreme conditions. The risk of quality issues is minimal if purchased from a reputable source.

For most users, this relay will perform adequately and restore A/C functionality without major drawbacks. If you re concerned about longevity, consider pairing it with a high-quality fuse (e.g., 30A 40A) and ensuring the rest of your A/C system is in good condition.

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### **Recommendation**

- You need a direct-fit, affordable replacement for a faulty A/C relay.

- You re confident in your ability to install it correctly.

- You re purchasing it from a trusted retailer (e.g., RockAuto, Amazon Prime, or a local auto parts store with good reviews).

- You re also addressing any other potential issues in your A/C system (e.g., checking fuses, wiring, and the compressor clutch).

- You want the absolute highest durability and are willing to pay for an OEM relay (though these are often hard to find and expensive).

- You suspect other components (like the A/C compressor or wiring) are failing, in which case a relay replacement alone won t fix the problem.

- You re uncomfortable with aftermarket parts and prefer only genuine GM components.

Before installing, test the relay with a multimeter to ensure it s functioning. If possible, replace the fuse in the A/C circuit (usually a 30A 40A fuse) at the same time, as a blown fuse can also cause relay failure. If the A/C still doesn t work after replacement, check for other issues like a faulty compressor clutch or low refrigerant.

Details:

12 Month Warranty Fitment Notes: Vehicle: Engine: 2004 - 2005 Chevrolet Express 35005.3L V8. The ECM controls the A/C Compressor voltage and speed. A failing relay can cause lack of cooling and in some cases, compressor failure. Durability tested on every new design.

Parts Geek - For 2004 - 2005 Chevrolet Express 3500 A/C Control Relay 35945TYTJ 5.3L V8: Review Fitment Notes to Ensure Proper Fit condition: New Brand: GPD Notes: Compressor Relay; Black 5-Way Micro Features: designed meet/exceed OE fit, form and function. Amperage draw tested.

part #: 35945tytj prices

• $18.54-$18.57

specifications chvyacheatercontrols:

• for makes: Chevrolet
• for years: 2004-2005
• brand: Gpd
• mpn: 35945tytj
• part type: Control
• manufacturer warranty: 12 Month Warranty
• notes: A/c Compressor Control Relay Compressor Relay; Black 5-way .
• years: 2004 2005
• application: Chevrolet Express 3500 A/c Control Relay
• product name 2: A/c Compressor Control Relay
• cs-sku: 400

payments chvyacheatercontrols:

• other
• credit card: Mastercard
• wallet: Apple-pay

returns chvyacheatercontrols:

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

general chvyacheatercontrols:

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

offer chvyacheatercontrols:

• availability: In Stock
• started: April 21, 2026
• options: Ship-to-home
• sold: 0
• quantity: 1

shipping chvyacheatercontrols:

• class: Standard
• carrier: FedEx
• type: Fixed
• service: FedEx Ground / FedEx Home Delivery
• cost: $0.00
• transit: 3-7 Days

seller chvyacheatercontrols:

• city: Upland, California
• rating: 98.8%
• # reviews: 329468

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