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How to Look Up Trouble Codes for a Chevy Truck

You can look up trouble codes for your Chevy truck right from your home garage, saving yourself time and money. You only need one tool to do the job: an On-Board Diagnostics (OBD) I or II code scanner. If your Chevy truck was manufactured in 1996 or later, you need to use an OBD II code scanner; if its an earlier model, use the OBD I code scanner. The On-Board Diagnostics computer monitors all the functions of the vehicle. It stores trouble codes received from sensors positioned throughout the vehicle. When it detects a code, it alerts you to the issue by illuminating a warning or service light on the vehicles instrument panel. Code scanners can be purchased from any auto parts retailer.

Instructions

1

Locate the trapezoidal-shaped Diagnostic Link Connector (DLC) port under the drivers side dashboard. This is usually just left of the steering column.

2

Plug the OBD code scanner into the DLC port.

3

Put the key into the ignition and turn it two clicks forward, taking care not to start the engine. Wait for this to power on the scanner or find the on/off button and press it.

4

Select the command "Read Codes" or something similar to this.

5

Wait for the codes to display and write them down on a piece of paper.

6

Look up the codes in the code scanners manual to get the exact diagnosis.

7

Unplug the code scanner and have your car serviced or repaired based on the trouble codes.