I have noticed
defroster was not working very well (first time used in cool weather).
When I put
my hand over the vent by the windshield, I found that no air was coming out.
I also noticed a
"hissing" sound when the defrost settings were selected OR the air
conditioning was turned on.
When I removed some paneling to see if the defrost controls were working, I
found that one of
the control arms was not moving as much as it should. I gave it a
little help (push) and got some
air to come out of the defroster.
I have NOT fixed this yet, but discovered that the same condition occurs
when the air controls
are moved to the dash vents only and then back to defrost. I suspect
that one or more of the
air control baffles is getting stuck.
Oh yeah, the air conditioner seems to have stopped working. The
compressor used to come on,
but now even that does not happen.
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I have noticed over
the last few months that the headlights sometimes appear to "Flicker" while
driving around at night. What I mean is that the lights appear to get
dim for a second and then
come back to their normal brightness. It does NOT appear to be related
to any vibration or when
I hit a bump in the road. It DOES appear to be related to times when extra
current is drawn from
the electrical system (i.e. MAF sensor kicks in).
While researching this issue, I found that there is a TSB (Technical Service
Bulletin) on several
GM vehicles for this issue (TSB 01-06-03-005). It involves replacing a screw
and washer on the
alternator that is used to ground the Voltage Regulator.
I got the "kit" (replacement screw & washer) and installed them today. This
took a total of about
10-15 minutes, once I located the screw.
I will keep an eye on the lights to see if this issue continues.
Note: The washer in the kit was "warped" a little. I am assuming that
this helps to keep the
screw from turning (like a "keep-washer").
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