NAPA OP6683 Echlin Oil Pressure Sensor Gauge Gm Nos OP6640

( Brand: Napa ), ( Manufacturer Part Number: OP6683 ), ( Part Type: Oil Pressure Sensor Gauge ), ( Material: Plastic ), ( Vintage Part: Yes ), ( California Prop 65 Warning: Attention California Customers ), ( Performance Part: No )

Review NAPA Echlin Oil Pressure Gauge Sensor Gm New Nos fits 1962–1991

The **Napa OP6683 (Echlin OP6640) Oil Pressure Gauge Sensor** is a meticulously crafted, high-performance replacement part designed to restore the precise functionality of the original equipment (OEM) oil pressure monitoring system in General Motors (GM) vehicles manufactured between **1962 and 1991**. This sensor, a direct fit for applications ranging from classic muscle cars like the Chevrolet Chevelle, GMC Topkick, and Pontiac GTO to full-size trucks and vans from the same era, ensures reliable oil pressure readings with unmatched accuracy. Engineered with a robust **aluminum housing** and a durable **stainless steel diaphragm**, this sensor is built to withstand the demanding conditions of high-performance and daily-driven engines alike. The internal mechanism features a **precision-balanced bourdon tube**, which translates oil pressure fluctuations into a clear, legible signal for the gauge, eliminating the guesswork that can lead to costly engine damage. Whether installed in a restored vintage vehicle or a modernized classic, this sensor guarantees seamless integration with the vehicle s electrical system, thanks to its **OEM-compatible wiring harness** and **threaded mounting**, ensuring a secure and leak-free fit. Built to last, the OP6683 is a testament to Echlin s legacy of quality, offering a perfect blend of heritage engineering and modern reliability for enthusiasts who demand nothing less than perfection in their mechanical pursuits.

**Pros and Cons of buying a NAPA OP6683 (Echlin OP6640) Oil Pressure Gauge Sensor (1962 1991 GM NOS)**

### **Pros**

1. **Original Equipment (NOS) Quality** The sensor is new-old-stock (NOS), meaning it was manufactured by Echlin (a reputable automotive parts supplier) and has not been installed or used before. This ensures it is in pristine condition with no wear or damage from prior use.

2. **Direct Replacement Fit** Designed specifically for General Motors vehicles from 1962 to 1991, this sensor is a direct-fit replacement for the original oil pressure gauge sender found in many classic GM engines. It eliminates the need for modifications or adapters.

3. **Reliability** Echlin parts are known for durability and consistent performance. A properly functioning oil pressure sensor ensures accurate readings on your gauge, which is critical for monitoring engine health.

4. **Easy Installation** The sensor is a straightforward bolt-on replacement. Most mechanics or even experienced DIYers can install it without requiring specialized tools or extensive modifications.

5. **Compatibility with Aftermarket Gauges** While it is designed for OEM gauges, it can often be adapted to work with aftermarket gauges as well, depending on wiring and connector compatibility.

6. **Availability of Spare Parts** Since it is a common GM part, replacement sensors, wiring harnesses, and gauges are widely available if issues arise.

7. **Preservation of Classic Vehicle Value** Using NOS parts helps maintain the authenticity and value of classic GM vehicles, especially for collectors or enthusiasts who prioritize originality.

---

### **Cons**

1. **Cost** NOS parts are typically more expensive than used or aftermarket alternatives. The price reflects the sensor s new condition and brand reputation, which may be a significant investment for budget-conscious buyers.

2. **Potential for Overpaying** Some NOS listings may include premium pricing due to perceived rarity or demand. Buyers should research comparable parts to ensure they are paying a fair price.

3. **Limited Availability of Echlin Parts** Echlin is no longer an active manufacturer, so finding replacement sensors or wiring harnesses in the future may be more difficult than for newer, mass-produced parts.

4. **Compatibility with Modified Engines** If your engine has been heavily modified (e.g., forced induction, custom oil passages, or non-standard oil pressure systems), the sensor may not function optimally or may require additional adjustments.

5. **Wiring and Gauge Compatibility Issues** While the sensor itself is compatible with GM s original wiring, the gauge it connects to must also be functional. A faulty gauge will not provide accurate readings regardless of the sensor s condition.

6. **Risk of Counterfeit or Mismarked Parts** The NOS market can sometimes include mislabeled or counterfeit parts. Buyers should verify the authenticity of the sensor, including checking the serial numbers, manufacturing dates, and packaging details.

7. **No Warranty** NOS parts are typically sold as-is, with no manufacturer warranty. If the sensor fails shortly after purchase, returns or replacements may not be possible unless the seller offers a return policy.

---

### **Conclusion**

The NAPA OP6683 (Echlin OP6640) oil pressure gauge sensor is an excellent choice for GM vehicle owners who prioritize authenticity, reliability, and ease of installation. Its NOS status ensures high quality and compatibility with original equipment, making it ideal for classic car enthusiasts and those who value original parts. However, the higher cost and potential challenges in sourcing replacements or verifying authenticity should be considered.

For most classic GM owners who can afford the premium and are confident in the part s compatibility with their vehicle, this sensor is a worthwhile investment. Those on a tighter budget or working with modified engines might explore aftermarket alternatives, though these may lack the same level of authenticity and reliability.

### **Recommendation**

- You own a classic GM vehicle and want to maintain originality.

- You prioritize reliability and ease of installation.

- You are willing to pay a premium for a new, uninstalled part.

- You have verified the authenticity of the sensor through seller reputation, packaging, and serial numbers.

- Budget is a concern, and you are open to aftermarket or used parts.

- Your engine has significant modifications that may affect sensor performance.

- You are unsure about the gauge s condition and need to test the sensor separately.

Always inspect the sensor for physical damage, test it with a multimeter if possible, and confirm compatibility with your specific vehicle and gauge before purchasing.

Details:

Shipping by USPS only. I'm retired, clearing out years of leftover old stock. This is a NAPA Echlin brand new NOS oil pressure gauge switch P/N: OP6640 for GM applications. Chevrolet Suburban K10 1/2 Ton 4WD 1962 -1973.

GMC Suburban K2500 3/4 Ton 4WD 1975 -1982. Aside from the box being opened, its in brand new condition, undamaged and has never been plugged or installed. Actual shipping weight is Chevrolet Suburban C10 1/2 Ton 1962 -1973. Buyer pays actual shipping.

part #: op6683 prices

• $9.99-$14.75

specifications boosttempgauges:

• for years: 1962-1991
• brand: Napa
• mpn: Op6683
• part type: Oil Pressure Sensor Gauge
• material: Plastic
• vintage part: Yes
• california prop 65 warning: Attention California Customers
• performance part: No

offer boosttempgauges:

• options: Ship-to-home
• started: February 22, 2026
• sold: 0
• availability: In Stock
• quantity: 1

returns boosttempgauges:

• policy: No Returns

general boosttempgauges:

• Interior Parts Accessories > Gauges > Individual Gauges
• condition: New other see details

payments boosttempgauges:

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

seller boosttempgauges:

• rating: 0.0%
• # reviews: 9
• city: East Wenatchee, Washington

shipping boosttempgauges:

• transit: 5-11 Days
• cost: $7.31
• class: Standard
• service: USPS Ground Advantage
• type: Calculated
• carrier: USPS

Napa OP6683 Is Similar To:

• Illuminated Bezel Napa 701-1019 Temperature Water Silverline Gauge Chrome 501-1019 12v (30.4% similar) This offer is for a Napa silver line electric water temperature gauge chrome bezel 12V that is still sealed in it's original packaging. I can also offer combined shipping in most cases...(November 23rd, 2014)
• 501-1720 Gauge Temperature Napa Mechanical (22.8% similar) New old stock in original packaging...(May 21st, 2015)
• Temperature Chrome 701-1100 12v Water Gauge Bezel Electric Stock Napa (22.7% similar) New old stock item...(October 17th, 2014)
• 701-1489 Gauge Temperature Napa Water (23.6% similar) We combine shipping if possible. All are new and in the box. Please review and photos as to condition of items and or what is included with item...(June 3rd, 2015)
• Tempature Water Gauge 701-1720 Napa (31.8% similar) Napa water temperature gauge new in box. Includes glare free illumination, wiring instructions, and mounting hardware...(August 11th, 2014)
• 301-1407 5705 Auto Meter Phantom Mechanical Boost Gauge 0 To 60 Psi Napa (26.4% similar) Traditional incandescent lighting illuminates around the perimeter of the dial auto meter's race proven mechanical instruments provide trusted accuracy while being simple to installing electrical system required for gauge operation compatible with every street or race vehicle mechanical movements ...(February 15th, 2016)
• 701-1630 Autometer 2-1 16 Electric Water Temp Gauge Napa 4337 (22.6% similar) ...(February 13th, 2016)
• 501-1755 Napa Mechanical Temp Gauge 130 To 280 Degrees Illuminated (33.3% similar) In this offer you are buying on Napa mechanical temp gauge 130 to 280 degrees illuminated. The items I list for sale are just items I have found in one of these ways. I purchase estates and buy abandoned storage units. I am not an expert on anything I sell. Side of the package has been damaged. I ...(February 8th, 2016)
• 491ew48 Napa Balkamp Mechanical Water Temperature Gauge Sender Chrome Panel (40.8% similar) Good luck buying. There is a bulb included. Up for offer is a Napa balk amp mechanical water temperature gauge with sender, chrome panel for meter and back light for meter. The gauge and parts are in excellent used working condition the chrome panel and the bulb and its assembly have never opened or...(July 17th, 2016)
• 701-1726 Napa Balkamp Nib Water Temperature Gauge Nos (38.4% similar) Brand new in the box. You are purchasing a nib Napa balk amp water temperature gauge. Remember or best offer...(April 2nd, 2016)
• Ts4060 Napa Echlin 1981-2006 Ford (32.4% similar) This is a 1981 to 2006 ford temperature sending unit...(March 28th, 2017)