Chevrolet C2500 Engine Coolant Temperature Sensor Guide (1995-2000)
Fix poor mileage and rough running on your 1995-2000 C2500 by replacing a faulty engine coolant temperature sensor.
- A bad ECT sensor commonly causes poor fuel economy, black smoke, and a check engine light on these trucks.
- Replacement is an easy, 30-minute DIY job with basic tools.
- Ensure you are buying the two-wire sensor for the ECU, not the one-wire sender for the gauge.
- Quality aftermarket brands like Delphi or Standard Motor Products offer reliable performance for less than OEM parts.
Understanding the Coolant Temp Sensor on Your C2500
The Engine Coolant Temperature (ECT) sensor is a key player in your truck's engine management system. It acts like a thermometer, telling the engine's computer how hot or cold the engine is. Based on this signal, the computer adjusts how much fuel to inject and when to fire the spark plugs. On these 1995-2000 Chevy trucks, it's important to know there are often two temperature sensors. One is a two-wire sensor for the computer (the ECT sensor), and the other is a one-wire sender just for the temperature gauge on your dashboard. This article focuses on the two-wire ECT sensor that affects how your engine runs.
Is an Aftermarket ECT Sensor Good Enough for Your Truck?
For a vehicle like the 1995-2000 C2500, aftermarket parts offer excellent value. The technology for this sensor is well-established, and reputable aftermarket brands produce reliable replacements. Brands like Delphi were often the original equipment (OE) manufacturer for General Motors, so choosing them is like getting an OEM part without the dealer price tag. Other brands like Standard Motor Products and Beck Arnley have a long-standing reputation for producing quality parts that meet or exceed original specifications. While you can still buy a genuine ACDelco part, a quality aftermarket sensor will perform reliably and save you money.
Common Ordering Mistake
Be sure you are buying the correct sensor. These trucks have a two-wire sensor for the computer and a one-wire sender for the dash gauge. This guide is for the two-wire sensor that impacts engine performance, usually located on the intake manifold near the thermostat housing. Check the number of pins on your old part before ordering.
Choosing the Right Aftermarket Brand
Not all brands are created equal. Here’s how they generally stack up for your C2500:
- Top Tier (OEM Quality): Delphi is a trusted choice, often being the original part manufacturer for GM. ACDelco is the official GM parts brand and the true OEM replacement.
- Excellent Aftermarket: Standard Motor Products (SMP) and Beck Arnley are highly regarded brands known for quality control and fitting correctly. They are a dependable choice for this repair.
- Reliable Value: Brands like NGK, Four Seasons, and Walker Products offer a good balance of price and quality, making them a solid option for budget-conscious repairs.
| Part Type | Price Range |
|---|---|
| New Aftermarket | $12.58 - $37.74 |
| New OEM (ACDelco) | $20 - $45 |
| Shop Labor | $50 - $150 |
Installation Tip
The ECT sensor is typically screwed into the intake manifold near the thermostat housing. When you unscrew the old sensor, some coolant will leak out. Have the new sensor ready to screw in quickly to minimize coolant loss. It's a good idea to place a drain pan underneath. The job is simple and can usually be done in under 30 minutes with a deep socket (often 19mm).
Frequently Asked Questions
Where is the ECT sensor located on a 1995-2000 C2500?
The main ECT sensor (the two-wire version for the computer) is almost always located on the front of the intake manifold, near the thermostat housing.
Can a bad ECT sensor cause my truck not to start?
Yes, it can cause hard starting, especially when the engine is warm. If the sensor is telling the computer the engine is cold, it will deliver too much fuel, which can flood the engine and make it difficult to start.
What happens if I don't replace a bad coolant sensor?
You will continue to experience symptoms like poor fuel economy, black smoke, rough running, and potential overheating. Over time, running with a very rich fuel mixture can damage the catalytic converter, leading to a much more expensive repair.
Are there any recalls for this part on my truck?
No, searches of the NHTSA database did not find any specific recalls or technical service bulletins (TSBs) for the engine coolant temperature sensor on the 1995-2000 Chevrolet C2500.
Technical Specifications
OEM Part Numbers: 15326386 213-77 19187357
Connector: 2-Pin Female | Thread Size: 3/8" - 18 NPTF
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Chevrolet C2500: