Did you ever figure out the problem? My 02 DeVille
has the same issue, no heat/ac light, few dash
cluster lights the lights out are; digital speedometer,
odometer, message display center, gear indicator,
turn signal indicator, and brights indicator. My gas
gauge also acts funny. My blower motor went out
so when changing that under the dash (passenger
side) I seen a little spark coming from the wires
behind the kick panel I believe we have a short issue
but not sure, it was working even after said spark
and one very cold day lights just suddenly went out.
Not sure exactly what the problem is I've been
working on it for months. Any info helps. Any one
with any additional information please email me at
bowers4pres@gmail.com