Can anyone explain the difference between the two service engine soon lights on the dash?
They appear to be controlled by different modules as I've had the left one on different than the right one. Is there a place that describes their functions and what governs their activation and de activation?
Thanks

Is this your cluster?:

Yessir

Are you referring to these two lights?:

I thought I already answered you.. sorry for the delay.
Yes. That'* it.

Did you look at the differences? They are for different problems.

The difference between them is what my question is asking.
What is it?

While searching, I found where a member on the Buickforums.com (BuickGirlFrom Mars) provided some good content about this same topic in a series of old posts: Link .

You must be fascinated with shapes. Look inside the shapes. See?

Okay, so that'* the cluster, I'll assume that you are also confirming that these two lights are the two [service engine soon] lights that you asked about in Post #1.

1 is SERVICE VEHICLE SOON
2 is SERVICE ENGINE SOON

From page 2-73 of your owner'* manual:


From page 2-79 of your owner'* manual: