If you do not have a PCM scanner to clear a DTC when it is a must, use the following procedure.

Note: If you use LS1edit, it will trip false DTCs because it hogs the CAN network and other modules could not exchange information so I suggest you use the DIC to clear because a PCM scanner will not clear DTCs of other modules such as radio, remote module, etc. They will exist but you will not see them with your scanner so always check via DIC to clear any DTCs set due to use of up or downloading the PCM with LS1edit.

1) Turn on the ignition, can be done with or without engine running.

2) Press the "reset" button to turn off any warning messages

3) Press and hold "options" and

4) While holding "options", press "fuel" four times within a 10-Second period.

Initially, the on-board diagnostics go into the "automatic" mode, which shows each module's DTCs in a pre-set sequence:

10 PCM Powertrain Control Module

28 TCS Traction Control system ABS

?? RTD Real Time damping page

40 BCM Body Control Module

60 IPC instrument Pane! Cluster

80 radio page

99 FIVAC Heater Vent-Air Conditioning

A0 LDCM Left Door Control module

Al RDCM Right Door Control Module

AC SCM Seat Control module

B0 RFA Remote Function Actuation

For each module, all DTCs will be displayed. If none are present in a module, you will see "no more codes" on the ICP display.

There are two kinds of DTCs, "Current" and "History," designated with a letter suffix, "C" or "H". A current code indicates that the malfunction is present in the system whose module is displaying data. A history code indicates a problem existed in that module sometime in the last 40 or 50 ignition cycles. When not accompanied by a current code of the same number, it is possible it's evidence of a previous problem. Now solved, that was not removed by clearing codes. More likely is that a history code indicates an intermittent malfunction.

"Intermittent" are the most challenging DTCs. An intermittent may have happened only once, may have happened more than once but is inconsistent in its appearance or may be happening on a regular basis but not at the time the IPC is displaying codes. History codes can also be caused by a current malfunction in a system that is not Operating at the time DTCs are displayed. An example is the rear window defogger, which doesn't operate until the BCM detects engine rpm. For history codes set by a system that does not operate with the key on and engine off, a special diagnostic tool called a "scan tester is necessary to properly diagnose the malfunction.

Once the IPC has displayed all 11 modules, the system goes into the manual mode, which allows selection of each module, using combinations of DIC buttons. The manual mode can also be entered at any time during the automatic sequence by pressing any button except "E/M". Once the IPC displays "manual diagnostics", you may select a particular module by pressing the options button to go forward or the "trip" button to go back. Once a system is selected and a DTC is displayed, if more than one are present; press "gages" To move forward or "fuel" to go back. To exit the diagnostic mode at any time, press E/M". If you want to erase or "clear" codes, press "reset". Clearing a code does not repair a problem. You are simply erasing the evidence of it in the module's memory.