Delphi SS12139 Engine Crankshaft Position Sensor

Delphi SS12139 Crankshaft Position Sensor

The Delphi SS12139 engine crankshaft position sensor provides the signal your engine control system uses to monitor crankshaft speed and position. Built from Delphi’s OE experience and aftermarket knowledge, it is a direct-fit replacement for select Chevrolet and GMC trucks and vans.

Compatible with 2001-2007 Chevrolet Silverado 2500 HD, Silverado 3500, Avalanche 2500, Suburban 2500, Express 3500, and select GMC Sierra, Yukon XL, and Savana applications, this Delphi crankshaft position sensor supports accurate engine timing input for the vehicles listed below.

• Brand: Delphi
• Part number: SS12139
• Engine crankshaft position sensor for ignition and engine management systems
• Black housing with oval connector shape
• 3-terminal, female connector with pin terminals
• Connector quantity: 1
• Wiring harness not included
• Package includes sensor and instruction sheet

OE-Style Signal Accuracy

Delphi SS12139 is built for vehicles that rely on a precise crankshaft position signal to coordinate ignition timing and engine operation. Delphi draws on more than a century of OE experience, and that background is reflected in the sensor design and connector configuration. If you are replacing a failing crank sensor on a Chevrolet Silverado 2500 HD, GMC Sierra 3500, or another listed application, SS12139 is a direct replacement option for the original part.

This part cross-references Standard Ignition PC269 for the same application.

Vehicle Fitment

• Fits 2007 Chevrolet Silverado 2500 HD Classic, N/A
• Fits 2007 Chevrolet Silverado 3500 Classic, N/A
• Fits 2007 GMC Sierra 2500 HD Classic, N/A
• Fits 2007 GMC Sierra 3500 Classic, N/A
• Fits 2002-2006 Chevrolet Avalanche 2500, N/A
• Fits 2001-2006 Chevrolet Silverado 2500 HD, N/A
• Fits 2001-2006 Chevrolet Silverado 3500, N/A
• Fits 2001-2006 Chevrolet Suburban 2500, N/A
• Fits 2001-2006 GMC Sierra 2500 HD, N/A
• Fits 2001-2006 GMC Sierra 3500, N/A
• Fits 2001-2006 GMC Yukon XL 2500, N/A
• Fits 2001-2002 Chevrolet Express 3500, N/A
• Fits 2001-2002 GMC Savana 3500, N/A

Common Replacement Reasons

• Hard starting or extended crank time
• Intermittent stalling or engine cut-out
• Check engine light related to crankshaft position signal faults
• Rough running or misfire symptoms tied to timing input loss
• No-start condition caused by a failed crank sensor

Installation Notes

Verify connector style, terminal count, and vehicle application before installation. The SS12139 uses a female oval connector with three male terminals and does not include a wiring harness. Compare the original sensor location and connector indexing on the vehicle before connecting the new part.

Quality Assurance

Delphi builds this sensor using OE heritage and application knowledge developed through long-term supplier experience with major automakers. That background supports consistent fitment and signal performance for the listed Chevrolet and GMC applications.