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Home >> Chevrolet >> 2004 >> Avalanche 2500 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Control System - 4.8L, 5.3L & 6.0L (DTC P0452 To DTC P2120)) >> Diagnostic Information and Procedures >> DTC P1381 >> Test Description

Test Description

WARNING: This page is about a different variant/trim than selected.

The number below refers to the step number on the diagnostic table.

  1. 1:  This step will diagnose a malfunction in the serial data circuits.
DTC P1381

Step Action Yes No
1  Did you perform the Diagnostic System Check-Engine Controls? Go to Diagnostic System Check - ABS (W/O JL4) or Diagnostic System Check - ABS (W/JL4) in Antilock Brake System Go to Diagnostic System Check - Engine Controls
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