1. Engine Cooling Components Deals
  2. sku: 21576870879039603
  3. FOUR SEASONS 78993DH

FOUR SEASONS 78993DH Engine Coolant Temperature Sender C7000

fits make: Gmc. year: 1989.

78993dh Four Seasons Engine Coolant Temperature Sender For 1989 Gmc C7000 -

( Brand: Four Seasons ), ( Manufacturer Part Number: 78993DH ), ( Part Type: Engine Sender ), ( Manufacturer Warranty: 1 Year ), ( Bundle: No ), ( Compatible Model: C7000 ), ( Short Description: Temperature Unit ), ( Cs-sku: 328 )

Review FOUR SEASONS Engine Coolant Temperature Sender Gmc fits 1989

The **Seasons 78993DH Engine Coolant Temperature Sender** is a high-performance, precision-engineered replacement sensor designed specifically for the **1989 GMC C7000** (and compatible with select Chevrolet and Ford applications) to ensure accurate and reliable monitoring of your engine s coolant temperature. Crafted from durable, corrosion-resistant materials, this sender unit features a robust **thermistor-based temperature sensor** that provides real-time data to your vehicle s engine control module (ECM), allowing for optimal fuel injection timing, ignition control, and overall engine efficiency. The sensor s **sealed, high-temperature-resistant housing** prevents leaks and ensures long-term durability, even under demanding operating conditions, while its **OEM-quality wiring harness** guarantees a secure and interference-free connection to the vehicle s electrical system. Ideal for both professional mechanics and DIY enthusiasts, this replacement sender is a direct-fit solution that restores proper engine performance, prevents overheating, and helps maintain the longevity of your powertrain. Whether you re restoring a classic GMC C7000 or upgrading an older vehicle s cooling system, the **Seasons 78993DH** delivers the precision and reliability needed to keep your engine running at peak efficiency.

### Pros and Cons of Buying a Season 78993DH Engine Coolant Temperature Sender for a 1989 GMC C7000

#### **Pros:**

1. **Compatibility** The part is specifically designed for your 1989 GMC C7000, ensuring a proper fit without modifications. This reduces the risk of installation issues or improper function.

2. **Reliability** If the sender is new or in good condition, it should provide accurate readings for the engine coolant temperature, which is critical for engine performance, fuel efficiency, and preventing overheating.

3. **Prevents Diagnostic Errors** A faulty temperature sender can trigger false error codes (e.g., P0118, P0117) in the engine control module (ECM). Replacing it with a known-good unit can resolve these issues and avoid unnecessary diagnostic trouble.

4. **Cost-Effective** Compared to labor costs for replacement, the part itself is relatively inexpensive. If you re comfortable with basic automotive repairs, you can save on labor by installing it yourself.

5. **Accessibility** The sender is a common aftermarket part, meaning it is widely available from auto parts stores, online retailers, or directly from manufacturers like Season. This makes sourcing easier than rare or discontinued OEM parts.

6. **Potential Longevity** If the sender is high-quality (e.g., from a reputable brand), it may last as long as the original or longer, reducing the likelihood of future replacements.

7. **Improved Drivability** Accurate temperature readings help the ECM optimize fuel injection, ignition timing, and other parameters, leading to smoother operation and better fuel economy.

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#### **Cons:**

1. **Potential Counterfeit or Low-Quality Units** Some aftermarket parts, especially those purchased from unknown sellers, may be counterfeit or of inferior quality. This could lead to premature failure or inaccurate readings.

2. **Installation Complexity** While the sender itself is straightforward, accessing it in a 1989 GMC C7000 may require removing components like the intake manifold, throttle body, or radiator hoses. This could be time-consuming or challenging for inexperienced DIYers.

3. **Compatibility Risks** Even if the part is listed as compatible, slight variations in wiring, connectors, or mounting points between years or models could cause issues. Always verify the exact fitment before purchasing.

4. **Wiring or Connector Issues** If the harness or connectors are damaged, replacing just the sender may not resolve the problem. You might need to inspect or replace wiring as well.

5. **Diagnostic Overrides** If the ECM has already recorded a fault due to the old sender, simply replacing it may not clear the code. You may need to use an OBD scanner to reset the system.

6. **Labor Costs if Professional Installation is Needed** If you re not comfortable with the installation, labor costs at a shop could offset the savings of buying a part yourself.

7. **Age of the Vehicle** A 1989 GMC C7000 may have other aging components (e.g., hoses, thermostat, water pump) that could fail shortly after replacing the sender. Addressing these issues concurrently might be advisable.

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### **Conclusion:**

Buying the **Season 78993DH Engine Coolant Temperature Sender** for your 1989 GMC C7000 is a practical solution if you re experiencing temperature-related issues, such as inaccurate gauges, error codes, or overheating concerns. The part offers a direct replacement with minimal risk of fitment problems, and its affordability makes it a cost-effective upgrade. However, the success of the replacement depends on sourcing a genuine part, ensuring proper installation, and addressing any accompanying issues (e.g., wiring, other cooling system components).

If you re confident in your mechanical skills and have verified the part s authenticity, proceeding with the purchase is a reasonable choice. For those less experienced, consulting a mechanic to confirm compatibility and assist with installation could prevent potential pitfalls.

### **Recommendation:**

1. **Purchase from a Trusted Source** Buy the sender from a reputable auto parts retailer (e.g., RockAuto, Amazon with verified sellers, or a local parts store with a return policy) to avoid counterfeit or low-quality units.

2. **Verify Fitment** Double-check that the part number (78993DH) matches your vehicle s exact specifications. Some GMC models may have slight variations in sender design.

3. **Inspect Related Components** While replacing the sender, examine the thermostat, hoses, water pump, and radiator for wear or failure. Addressing these issues simultaneously can prevent future problems.

4. **Test the Installation** After replacing the sender, clear any existing error codes with an OBD scanner and monitor the temperature gauge or digital display for accurate readings. If issues persist, the wiring or ECM may need further inspection.

5. **Consider Professional Help if Needed** If the installation proves difficult or you re unsure about any steps, a mechanic can ensure it s done correctly, especially if other components (like the intake manifold) must be removed.

**Final Verdict:** The Season 78993DH sender is a solid choice for resolving temperature sender issues in your 1989 GMC C7000, provided you take precautions to ensure quality and proper installation. For most DIYers, this is a straightforward and worthwhile replacement.

Details:

Temperature Unit. Shipping Cost: Please refer to shipping section. Shipping Handling Service: Please refer to shipping section. Whether you are doing maintenance, a long-term automotive project, or just trying to get your vehicle running, count on help with small big project.

Engine Coolant Temperature Sender for 1989 GMC C7000 - Four Seasons:: : : Notes: With Gauge; 2 Term. Item specifics:: Connector Gender: Female, Shape: Oval, Fitting Thread Size: 3/8 Pipe 43/64 x 18, Number of Connectors: 1 Connectors, Terminals: 2, Terminal Pin Qty. Brand: Four Seasons, Warranty: 1 Year, Part Type: Engine Coolant Temperature Sender, Sending Unit.

part #: 78993dh prices

  • $83.92-$198.94

specifications ocoosys:

  • for makes: Gmc
  • for years: 1989
  • brand: Four Seasons
  • mpn: 78993dh
  • part type: Engine Sender
  • manufacturer warranty: 1 Year
  • bundle: No
  • compatible model: C7000
  • short description: Temperature Unit
  • cs-sku: 328

offer ocoosys:

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

shipping ocoosys:

  • type: Fixed
  • transit: 3-6 Days
  • cost: $0.00
  • service: Standard
  • class: Standard

returns ocoosys:

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

seller ocoosys:

  • rating: 99.7%
  • city: Hempstead, New York
  • # reviews: 25523

general ocoosys:

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

payments ocoosys:

  • wallet: Apple-pay
  • other
  • credit card: Discover
for makes: gmc, for years: 1989, part type: engine sender, manufacturer warranty: 1 year, bundle: no, compatible model: c7000, short description: temperature unit, cs-sku: 328,
category: auto parts > car truck parts accessories > engine cooling components, sku: 21576870879039603,
Four Seasons 78993DH Is Similar To:
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4 offers $83.92–$198.94 USD
  • New. Offer #1 priced at $83.92 + $0.00 shipping estimate = $83.92* total. Temperature Unit Part Type: Engine Coolant Temperature Sender.FREE SHIPPING
  • New. Offer #2 priced at $198.74 + $0.00 shipping estimate = $198.74* total. 1990 GMC Engine: 7.0L V8; Standard Rotation; Severe Duty Thermal Fan Clutch; w/ 6 Bolt Mounting Holes; Marked NG or NF;. 1990 GMC Engine: 6.0L V8; Standard Rotation; Severe Duty Thermal Fan Clutch; w/ 6 Bolt Mounting Holes; Marked NG or NF;.FREE SHIPPING
  • New. Offer #3 priced at $198.94 + $0.00 shipping estimate = $198.94* total. 1990 GMC Topkick Engine: 7.0L V8; Standard Rotation; Severe Duty Thermal Fan Clutch; w/ 6 Bolt Mounting Holes; Marked NG or NF;. 1990 GMC Topkick Engine: 6.0L V8; Standard Rotation; Severe Duty Thermal Fan Clutch; w/ 6 Bolt Mounting Holes; Marked NG or NF;.FREE SHIPPING
  • New. Offer #4 priced at $33.99 + $0.00 shipping estimate = $33.99* total. 1993 GMC Topkick Engine: 6.0L V8;. 1991 GMC Topkick Engine: 6.0L V8;.FREE SHIPPING

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