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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 69 (Automatic Transmission Diagnosis - 4L80-E (Diesel)) >> Diagnostic Tests >> DTC P1811: Maximum Adapt & Long Shift >> Test Description

Test Description

WARNING: This page is about a different car, the 2002 GMC Cab & Chassis Sierra 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 for low fluid level, which can cause delayed shifts.

  2. 3

    This step compares the indicated range signal to the TFP manual valve position switch selected gear range.

  3. 5

    This step tests for low line pressure, which can cause delayed and long shifts.

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