Conditions For Clearing DTC
WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 1999 GMC Yukon, 1999 GMC Suburban, 1999 GMC Sierra, 1999 GMC Pickup, and 1999 GMC Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
Current DTC clears when voltage difference between DRIVER HIGH terminal No. 2 and DRIVER LOW terminal No. 3 is less than 400 millivolts for 500 milliseconds. History DTC clears when scan tool CLEAR CODES is received or 250 malfunction-free ignition cycles have occurred.