General Motors — Clearing Diagnostic Trouble Codes - Scan Tool
Testing & diagnosis · ECM / Diagnostic System
From a General Motors service manual — check it applies to your exact model before use.
Before you start
- When clearing DTC's with a scan tool, the ignition must be cycled to the OFF position or the DTC's will not clear
Procedure
- Install scan tool
- Start engine
- Select "Clear DTC's" function
- Clear DTC's
- Turn ignition OFF for at least 20 seconds
- Turn ignition ON and read DTC's; if still present, repeat procedure from step 2
Tools required
- Scan tool Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: General Motors service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.