Service Engine Soon Light

[502Python]

My SES light flashed on today for less than 1 minute and went off. It has not come back on after about 35mi of driving. My change oil message came on last week and I have not changed the oil yet. Are these two related or do I have another problem?? I have a 2002 3500 4x4 with the 8.1 and 35k miles.

[GM-Tech]

Totally unrelated. Just a coincidence.

[502Python]

Totally unrelated.  Just a coincidence.

 

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So what does/can the SES light flash mean. If it goes off and doesn't come back on can I assume all is OK??

[GM-Tech]

So what does/can the SES light flash mean. If it goes off and doesn't come back on can I assume all is OK??

 

Without a code, I can't tell you what the light meant. There are probably 50 different things it could be. If it's off now, it's probably okay, but suspect you'll see it again soon.

[Haulin' 8.1]

Correct me if I'm wrong but a "flashing" SES light is reserverd for only one condition. It would indicate a current missfire condition bad enough to cause catalyst damage.

 

Vernon