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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 82 (Automatic Transmission Diagnosis - ALLISON) >> Diagnostic Tests >> DTC P0726: Engine Speed Sensor Circuit - Performance >> Test Description

Test Description

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The numbers listed below refer to step numbers in the diagnostic procedure:

  1. 2

    This step tests ignition voltage.

  2. 3

    This step tests the wiring harness for opens or shorts.

  3. 4

    This step tests engine speed sensor resistance.

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