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6.5L GM Diesel Oil Pressure Sensor/Switch (OPS) Connector Pigtail

6.5L GM Diesel Oil Pressure Sensor/Switch (OPS) Connector Pigtail

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PT-121 Multi-purpose Pigtail, 3 Wire Connector

Multi-purpose three wire connector pigtail for GM vehicles. Pigtail is equivalent to ACDelco PT-121 and GM 12085499. Applications include the oil pressure sensor/switch (OPS) on 6.5L diesel equipped vehicles. Assembled using OEM connector and terminals for a perfect factory fit. Produced from high grade, high temp wire. Guaranteed to meet or exceed OEM quality.


  • Made in the USA
  • ACDelco PT-121 (GM 12085499) equivalent
  • 16 in (40 cm) overall length
  • Assembled using OEM Delphi connector and terminals
  • Includes butt splices and heat shrink tubing for installation
  • 1 year warranty


All 6.5L diesels, including:

1992 - 2000 Chevrolet/GMC C2500, C3500 pickups
1992 - 2000 Chevrolet/GMC K2500, K3500 pickups
1994 - 1998 Chevrolet/GMC C1500 pickups
1994 - 1999 Chevrolet/GMC K1500 pickups
1992 - 2000 Chevrolet Suburban C2500
1994 - 1999 Chevrolet Suburban K1500, K2500
1994 - 1999 Chevrolet Suburban C1500
1992 - 2002 Chevrolet/GMC C3500HD chassis cab
1995 - 1999 Chevrolet Tahoe
1994 - 1999 GMC Yukon


Manufacturer: REID TEKK
Part Number(s): RT-2512101
Interchange/Alt Part Number(s): ACDelco PT-121
Standard S637
GM 12085499
Origin: USA
 Warranty: 1 year, unlimited mileage
Shipping Weight: 5 oz