SPOOLOGIC Mass Air Flow (MAF) Sensor

The SPOOLOGIC SL-600-030 Mass Air Flow Sensor is designed for the listed 2001–2007 Chevrolet and GMC applications with the 6.6L Duramax LB7, LLY, or LBZ. It supplies the airflow feedback the engine controller uses to evaluate fresh-air delivery and air-system operation.

Features

• Brand-new mass air flow sensor
• Measures filtered intake air mass
• Factory-style electrical connection and mounting
• Provides airflow feedback to the original engine-management system

What's Included

• 1 SPOOLOGIC Mass Air Flow Sensor — SL-600-030

Fitment

• 2001-2004 Chevrolet Silverado GMC Sierra 2500 3500 6.6L Duramax LB7
• 2004.5-2005 Chevrolet Silverado GMC Sierra 2500 3500 6.6L Duramax LLY
• 2006 Chevrolet Silverado GMC Sierra 2500 3500 6.6L Duramax LLY
• 2006-2007 Chevrolet Silverado GMC Sierra 2500 3500 6.6L Duramax LBZ
• 2006-2007 Chevrolet Express GMC Savana 2500 3500 6.6L Duramax LLY

MAF Sensor Operation

The ECM uses MAF data to assess fresh-air delivery. Diagnostics differ between the LB7 and the later LLY/LBZ engines: the LB7’s factory turbo is not the variable-vane system used on the LLY and LBZ. EGR-related checks apply only to vehicles equipped with that system.

Common MAF Sensor Fault Codes

• P0101: MAF range/performance; inspect the complete air path as well as the sensor.
• P0102 / P0103: MAF circuit low/high input; check supply, ground, signal integrity, and terminal contact.

Code availability varies by model year and calibration. A stored code identifies a condition to diagnose; it does not prove the component has failed.

Diagnose Before Replacing

Inspect the air filter, airbox seal, sensor connector, and intake ducting before replacement. Check for damaged terminals, wiring rub-through, oil contamination, and leaks downstream of the MAF. Compare live airflow with engine speed, load, boost, and EGR command instead of judging the sensor from a single idle reading. On a modified intake, confirm that the sensor housing and calibration remain compatible before treating an airflow error as sensor failure.

Installation Notes

Switch the ignition off before disconnecting the sensor. Keep the sensing element clean and untouched, install it in the correct airflow orientation, and seal the intake connections. After the repair, clear stored faults and complete any model-specific adaptation or verification procedure.

OEM Cross-References

• GM: 97209545
• ACDelco: 213-4115 / 2134115

1-Year Limited Warranty — No Returns

This SPOOLOGIC electrical component is covered by a 1-Year Limited Warranty against defects in materials and workmanship. Electrical components are non-returnable. Warranty claims require prior authorization and return of the component for inspection. See the SPOOLOGIC Warranty Policy for coverage, exclusions, and claim procedures.