FITMENT
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2011-2016 Chevy/GMC 2500 HD, 3500 HD with 6.6L Duramax Diesel engine.
Interchange Part Numbers:
DESCRIPTION
Product Overview
- Operating as a dedicated positional node in multi-sensor exhaust networks, the TruckTok 273-10001 EGT Sensor provides essential thermal telemetry for complex DPF and SCR emissions control. Engineered to precise factory voltage curves, this heavy-duty component delivers exact cross-reference coverage for 273-10001, 12622555, 19418898, and 12639456 specifications.
- Built with location-dedicated thermocouple metallurgy, this replacement sensor restores rapid, drift-free thermal signals to the engine controller. Installing this exact-fit unit eliminates false emissions plausibility codes, prevents unexpected DPF regeneration aborts, and maintains uncompromised torque delivery during heavy towing.
Key Features
- Engine-controller-aligned electrical response delivers instantaneous temperature feedback, eliminating the sensor-induced execution lags that disrupt active emissions timing.
- Precision-matched resistance profiles prevent output divergence from adjacent system sensors, keeping the ECM’s cross-sensor validation checks within target windows.
- Internal junction anchoring neutralizes thermal sensor noise triggered by turbulent exhaust pulsation, maintaining a smooth, reliable voltage curve during heavy acceleration.
- Internal core structure absorbs differential material expansion caused by extreme temperature spikes, protecting electrical continuity against fatigue-induced open circuits.
FAQ
Q: What factors account for cost differences across various EGT sensor positions on the LML platform?
A: Price variance stems from position-specific manufacturing tolerances and thermocouple calibration windows. Sensors positioned at critical feedback nodes—such as those driving SCR dosing algorithms and active DPF regeneration triggers—require exceptionally tight millivolt accuracy bands during production. Because LML positions are non-interchangeable, each features a unique calibration spec.
Q: Can I diagnose which LML sensor is bad using only a basic code reader?
A: Standard OBD-II readers display generic circuit codes (such as P0544 or P2031) but often lack the capability to pinpoint specific sensor positions. Accessing GM-enhanced powertrain diagnostics via a professional scan tool or reviewing Freeze Frame data is necessary to identify the exact failed node within the distributed sensing network.
Q: What is the recommended best practice when diagnosing multiple EGT sensor positions on a single vehicle?
A: When performing multi-node system diagnostics, cross-reference the active Diagnostic Trouble Code (DTC) with target OEM part numbers prior to replacing any components. Keeping a diagnostic log of specific positional numbers ensures precise component tracking and prevents location mismatch during reassembly.
Q: Can a weak battery or low system voltage trigger false EGT fault codes?
A: While the thermocouple self-generates a millivolt output based on exhaust heat, the ECM’s Analog-to-Digital (A/D) converter relies on a stable reference voltage to interpret signal data. Severe system voltage fluctuations can induce analog conversion noise, causing false transient sensor codes. Verifying battery reference voltage quickly rules out power-supply distortion.
Q: Looking for a different LML EGT sensor position?
A: The LML uses multiple EGT positions. We carry the 19418987, 273-10029, and 12622554. Match your old sensor’s part number to grab whichever position you need.
