Conditions for Clearing the DTC

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The ECM turns OFF the MIL after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
A scan tool can clear the code from TCM history. The TCM automatically clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without failure.

Step	Action	Yes	No
Schematic Reference: Automatic Transmission Controls Schematics
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle
2	Install the scan tool. IMPORTANT: Before clearing the DTC, use the scan tool in order to record the Freeze Frame and Failure Records for reference. The Clear Info function will erase the data. DTC P0700 is set by the ECM. DTC P0700 allows a technician to be alerted from the engine diagnostic side that the TCM is setting a DTC and is requesting the MIL. If the TCM has DTCs set that are requesting MIL illumination, those DTCs must be diagnosed first. Refer to Obtaining Diagnostic Trouble Codes . Turn ON the ignition, with the engine OFF. Does the scan tool display any DTCs other than DTC P0700?	Go to Diagnostic Trouble Code (DTC) List/Type	Go to Diagnostic System Check - Vehicle