Chevrolet 2001 Impala Owner's Manual page 166

Service Vehicle Soon
United States
This message will come on if you have engine problems.
These problems may not be obvious and may not
affect vehicle performance or durability. Consult a
qualified dealership for necessary repairs to maintain
top vehicle performance.
This message may also appear if there are electrical
problems with the trunk release sensor. See "Trunk
Release Sensor" in the Index for more information.
2-96
Trunk Open
Canada
This message will appear if the trunk is not completely
closed and the ignition is in ON.
If you are in a forward or reverse gear position you will
also hear four chimes.
If this message flashes for one minute after the ignition
is turned on, the trunk release sensor is turned off.
See "Trunk Release Sensor" in the Index for
more information.
United States Canada