1. Engine Cooling Components Deals
  2. sku: 21043117902288603
  3. AC DELCO 73945DPKS

AC DELCO 73945DPKS Water Temperature Sensor

fits model: 1500, Silverado. make: Chevrolet. year: 1999–2013.

73945dpks Ac Delco For Chevrolet Silverado 1500 Water Temperature Sensor

( Brand: Ac Delco ), ( Manufacturer Part Number: 73945DPKS ), ( Part Type: Sensor ), ( Manufacturer Warranty: 12 Month Warranty ), ( Notes: Engine Coolant Temperature Sensor New; Use Together With Ma. ), ( Years: 2004 2013 2005 2002 1999 2000 2001 2003 2006 2007 2008 2009 2010 ), ( Application: Chevrolet Silverado 1500 Water Temperature Sensor ), ( Product Name 2: Engine Coolant Temperature Sensor ), ( Cs-sku: 400 )

Review AC DELCO Chevrolet Water Temperature Sensor fits SILVERADO 1500 1999–2013

The **AC Delco 73945DPKS Water Temperature Sensor** is a high-performance, direct-fit replacement designed specifically for the **Chevrolet Silverado 1500** (and compatible GMC Sierra models), ensuring reliable engine temperature monitoring and optimal cooling system functionality. Engineered to meet or exceed OEM specifications, this sensor is crafted from durable, corrosion-resistant materials, including a robust stainless steel or nickel-plated housing, which enhances longevity and prevents premature failure even in harsh driving conditions or extreme climates. The sensor features a precision-engineered thermistor element, a critical component that accurately measures coolant temperature and transmits real-time data to the vehicle s Engine Control Module (ECM). This data is essential for maintaining proper engine operation, as it influences critical functions such as fuel injection timing, ignition advance, and cooling fan activation, all of which contribute to improved fuel efficiency, reduced emissions, and protection against overheating.

Installation of the **AC Delco 73945DPKS** is straightforward, thanks to its **direct-fit design**, which aligns perfectly with the factory sensor s mounting location, eliminating the need for modifications or additional adapters. The sensor includes a **gasket or O-ring seal** (depending on the application) to ensure a leak-proof connection, preventing coolant leaks that could lead to engine damage or warning light activations. Built to withstand the high pressures and temperatures inherent in modern cooling systems, this sensor is compatible with a wide range of **2007 2023 Chevrolet Silverado 1500 models** (including LS, LT, SS, and Custom trims) and their GMC counterparts, making it a versatile and cost-effective solution for both original equipment replacement and aftermarket upgrades. Whether addressing a faulty sensor that triggered a **Check Engine Light (CEL)**, a malfunctioning cooling system, or simply proactive maintenance, this sensor delivers consistent performance and peace of mind.

Beyond its technical superiority, the **AC Delco 73945DPKS** reflects the brand s commitment to quality and reliability, a legacy built on decades of automotive innovation. AC Delco, a trusted name in aftermarket automotive parts, ensures that each sensor undergoes rigorous testing to guarantee compatibility, durability, and performance on par with factory specifications. By choosing this sensor, vehicle owners can restore their Silverado 1500 s cooling system to optimal condition, avoid costly repairs associated with sensor failure, and enjoy enhanced engine protection all while benefiting from the confidence of a brand synonymous with dependability. Whether tackled as a DIY project or installed by a professional mechanic, this sensor is a straightforward yet impactful upgrade that keeps the heart of your truck running smoothly for miles to come.

The **AC Delco 73945DPKS** is a water temperature sensor designed for the **Chevrolet Silverado 1500 (and related GM trucks)**. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the AC Delco 73945DPKS Water Temperature Sensor**

1. **OEM Quality and Reliability**

AC Delco is a well-known brand under General Motors, producing parts that meet or exceed OEM specifications. This sensor is designed to function identically to the original equipment sensor, ensuring proper compatibility and performance.

2. **Direct Fitment**

The part number **73945DPKS** is specifically engineered for the **Chevrolet Silverado 1500 (and GMC Sierra)** with the correct engine applications (typically **4.3L V6, 4.8L V8, 5.3L V8, and 6.2L V8**). It fits without modification, reducing installation hassle.

3. **Durability and Longevity**

AC Delco sensors are built to withstand engine heat and pressure, reducing the risk of premature failure compared to aftermarket sensors of unknown quality.

4. **Compatibility with Modern Diagnostics**

Since it is an OEM or high-quality replacement, it will work seamlessly with **OBD-II scanners** and **check engine light diagnostics**, avoiding compatibility issues that some generic sensors may have.

5. **Warranty and Support**

AC Delco parts often come with a **limited warranty** (typically 1 2 years), providing peace of mind in case of defects. GM dealerships and many auto parts stores offer return or replacement policies.

6. **Consistent Performance**

Unlike some budget sensors that may drift over time, the AC Delco sensor provides **accurate temperature readings**, which is critical for proper engine cooling system function and fuel injection calibration.

7. **Ease of Installation**

It is a **direct bolt-on replacement**, requiring no additional tools or modifications beyond basic removal of the old sensor. Most users can install it themselves in under 30 minutes.

---

### **Cons of the AC Delco 73945DPKS Water Temperature Sensor**

1. **Higher Cost Compared to Aftermarket Alternatives**

The AC Delco sensor is **more expensive** than generic or no-name brands (often **$20 $40 more**). While this reflects its quality, it may not be justified for budget-conscious buyers who are willing to take a slight risk.

2. **Potential Overkill for Some Applications**

If the original sensor was already failing due to **mechanical wear (e.g., cracked housing, corroded threads)** rather than electrical failure, replacing it with an identical OEM sensor may not fully resolve the issue. In such cases, a **new sensor gasket or thread sealant** might be needed.

3. **Limited Availability in Some Regions**

While widely stocked at **GM dealerships, AutoZone, O Reilly Auto Parts, and Amazon**, it may not be as easily accessible in smaller or rural areas compared to more generic sensors.

4. **No Significant Performance Advantage Over High-Quality Aftermarket**

If you choose a **reputable aftermarket brand** (e.g., **Motorcraft, Bosch, or ACDelco s own budget line**), you may get **similar reliability at a lower cost**. The difference in quality between **AC Delco 73945DPKS and a Motorcraft equivalent** is often negligible for most drivers.

5. **Potential for Counterfeit Parts**

Since it is an OEM part, there is a risk of **counterfeit AC Delco sensors** being sold, especially on third-party marketplaces. Buying from **authorized dealers, GM parts stores, or trusted retailers** minimizes this risk.

---

### **Conclusion**

The **AC Delco 73945DPKS water temperature sensor** is an **excellent choice** for most Chevrolet Silverado 1500 owners who prioritize **reliability, direct fitment, and OEM-level performance**. It is the **safest and most compatible option**, especially if you want to avoid potential issues with generic sensors.

However, if **cost is a major concern** and you are comfortable with **reputable aftermarket brands**, alternatives like **Motorcraft, Bosch, or even some high-end generic sensors** may offer **similar longevity at a lower price**. The trade-off is a **slightly higher risk of failure** (though still low with quality brands).

For **most drivers**, the **AC Delco sensor is the best balance of quality, warranty, and peace of mind**. It is particularly recommended if:

- You want **OEM-level reliability**.

- You are replacing a **failing sensor** and want to avoid future issues.

- You prefer **direct fitment without compatibility concerns**.

- You are willing to pay a **premium for quality**.

If you are on a **tight budget** and the sensor is not critical to immediate operation, a **high-quality aftermarket alternative** (e.g., **Motorcraft WTS1000**) could be a reasonable compromise.

---

### **Final Recommendation**

**Buy the AC Delco 73945DPKS if:**

You want the **most reliable, OEM-certified replacement**.

You are replacing a **known bad sensor** and want to avoid future diagnostics.

You prefer **direct fitment with no compatibility risks**.

You are willing to pay a **slightly higher price** for long-term confidence.

**Consider an aftermarket alternative (e.g., Motorcraft, Bosch) if:**

You are **cost-conscious** and willing to accept a **minimal risk** of slightly lower reliability.

You have **confirmed the sensor is purely electrical** (not mechanically damaged).

You are buying from a **trusted retailer** to avoid counterfeits.

**Avoid generic/no-name sensors unless:**

You are **certain the part is from a reputable brand**.

You are **willing to accept the possibility of early failure** (though even cheap sensors often last years).

You are **not experiencing critical issues** (e.g., overheating, misfires) that justify the risk.

**Best Purchase Sources:**

- **GM Dealership** (for warranty-backed OEM parts)

- **AutoZone / O Reilly Auto Parts** (for verified AC Delco stock)

- **Amazon (sold by GM or authorized sellers)** (for convenience)

- **RockAuto / PartsGeek** (for direct fitment verification)

**Installation Tip:**

- Always **clean the threads** before installing to prevent coolant leaks.

- If the sensor housing is **cracked or corroded**, consider **replacing the water pump or intake manifold gasket** as well, as these are common failure points.

By choosing the **AC Delco 73945DPKS**, you are making a **safe, high-quality investment** in your Silverado s cooling system. If budget is a concern, a **Motorcraft or Bosch equivalent** remains a strong second choice.

Details:

Parts Geek - For Chevrolet Silverado 1500 Water Temperature Sensor AC Delco 73945DPKS: Review Fitment Notes to Ensure Proper Fit condition: New Brand: Notes: Engine Coolant New; USE TOGETHER WITH MATING CONNECTOR PT1798; 2-WAY MALE MATING With LEADS 88987993 Meets or Exceeds OEM Specifications: Yes Features: GM regularly updates production and service part designs integrate new materials technologies. GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle.

part #: 73945dpks price

  • $34.78

specifications ocoosys:

  • for models: 1500, Silverado
  • for makes: Chevrolet
  • for years: 1999-2013
  • brand: Ac Delco
  • mpn: 73945dpks
  • part type: Sensor
  • manufacturer warranty: 12 Month Warranty
  • notes: Engine Coolant Temperature Sensor New; Use Together With Ma.
  • years: 2004 2013 2005 2002 1999 2000 2001 2003 2006 2007 2008 2009 2010
  • application: Chevrolet Silverado 1500 Water Temperature Sensor
  • product name 2: Engine Coolant Temperature Sensor
  • cs-sku: 400

general ocoosys:

  • Car Truck Parts Accessories > Engine Cooling Components > Other Engine Cooling Components
  • condition: New

returns ocoosys:

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

shipping ocoosys:

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

seller ocoosys:

  • # reviews: 328359
  • rating: 98.8%
  • city: Phoenix, Arizona

payments ocoosys:

  • credit card: Visa
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  • wallet: Apple-pay

offer ocoosys:

  • started: April 15, 2026
  • quantity: 1
  • availability: In Stock
  • sold: 0
  • options: Ship-to-home
for models: 1500, silverado, for makes: chevrolet, for years: 1999-2013, part type: sensor, manufacturer warranty: 12 month warranty, notes: engine coolant temperature sensor new; use together with ma., years: 2004 2013 2005 2002 1999 2000 2001 2003 2006 2007 2008 2009 2010, application: chevrolet silverado 1500 water temperature sensor, product name 2: engine coolant temperature sensor, cs-sku: 400,
category: auto parts > car truck parts accessories > engine cooling components, sku: 21043117902288603,
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