With Tech-1 Scan Tool

CLEARING DIAGNOSTIC TROUBLE CODES (DTCs)
The DTCs in EBCM memory are erased in one of two ways:
1. TECH-1 "Clear DTCs" selection.
2. Ignition cycle default.
These two methods are detailed below. Be sure to verify proper system operation and absence of DTCs when the clearing procedure is completed.
The EBCM will not permit DTC clearing until all DTCs have been displayed. Also, DTCs cannot be cleared by disconnecting the EBCM, disconnecting the battery cables or turning the ignition switch to "LOCK" (except on an ignition cycle default).

CLEARING DIAGNOSTIC TROUBLE CODES (DTCs)
TECH-1 METHOD
1. Select F2 for "TROUBLE CODES-DTC(s)."
2. After DTCs have been viewed completely, the TECH-1 will prompt, "CLEAR CODES?"; press "YES."
3. TECH-1 will then read, "HISTORY DATA WILL BE LOST. CLEAR CODES?" Press 'YES" and DTCs will be cleared.