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PT-121 Multi-purpose Pigtail, 3 wire

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




FREE to anywhere in the U.S.A.
Applicable shipping fees will be applied for customers outside of the U.S.


In stock, ships next business day


Various - see details in description below

Part Number:

RT-G1211 (replaces ACDelco PT-121)


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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.


Electrical connectors should be replaced anytime the connector shows signs of deterioration, fits loosely on the device, the locking detent breaks, the wire insulation becomes compromised, or the connector shows other signs of wear/failure.


• Made in the USA

• ACDelco PT-121 (GM 12085499) equivalent

• 16 in (40 cm) overall length

• Assembled using OEM Delphi connector and terminals

• Soldered and crimped terminals for superior reliability

• High grade, USA made wire

• 1 year warranty

Application Notes

1992 - 2002 Chevrolet Silverado 1500/2500/3500 (6.5L diesel)
1994 - 1999 Chevrolet Suburban/Tahoe (6.5L diesel)
1992 - 2002 GMC Sierra 1500/2500/3500 (6.5L diesel)
1994 - 1999 GMC Yukon (6.5L diesel)

Additional Details



Part Number:


Alternate Part Number(s):

ACDelco PT-121
Standard S637
GM 12085499




1 year, unlimited mileage

Shipping Weight:

7 oz

Estimated Delivery:

3 - 5 business days

Domestic shipping: This items ships for FREE to any address within the continental United States. Orders received by 7:00 am PST are processed and shipped same day, Mon - Fri. Orders received after 7:00 am PST or on weekends are shipped the following business day. Items are shipped to your confirmed PayPal address.

Shipping to Canada: We ship to Canada at a discounted rate. An invoice with applicable shipping fees will be sent via PayPal after purchase for all orders shipping to Canada. Orders will be ship after these fees have been paid.

Return Policy: Customer satisfaction is our highest priority. Unused, unopened products may be returned hassle free within 30 days. To initiate a return or for any additional customer service related questions, please contact us; you will receive a response in 1 to 2 business days.