Test Description
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The number below refers to the step number on the diagnostic table.
- 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 in Antilock Brake System | Go to Diagnostic System Check - Engine Controls |