Fitment Level: OE Match / Platform Verified

Compatible with GM diesel emission aftertreatment systems using OEM references:

• 12661098
• 12662647 (updated replacement)
• Bosch PM sensor family (commonly 0281007879 / 0281008982 depending on calibration)

Typical applications include:

• Chevrolet Silverado 1500 3.0 Duramax diesel (LM2 / LZ0)
• GMC Sierra 1500 3.0 Duramax diesel
• Chevrolet Tahoe / Suburban 3.0 Duramax (selected configurations)
• GM light-duty diesel platforms with DPF soot monitoring systems

This sensor is used in diesel particulate matter monitoring systems, where it measures soot concentration downstream of the diesel particulate filter (DPF). The ECU uses this signal to:

• verify DPF regeneration efficiency
• detect soot breakthrough or filter degradation
• optimize regeneration intervals
• maintain emissions compliance for EPA / Euro-equivalent diesel systems

⚠️ Important:
This is a DPF particulate matter (PM) sensor, not a NOx or pressure sensor.
It directly measures soot concentration after the DPF and is essential for GM Duramax emissions control strategy and regeneration logic.

Fitment must always be confirmed strictly by OEM number (12661098), as GM often supersedes PM sensor revisions depending on engine generation (LM2 vs LZ0) and calibration updates.