I've posted about this before, but have so far struck out. My 02 Impala LS
gets into this mode every so often where the headlights/dashlights will
blink on and off continuously (about 1 blink/second) when I decelerate.
The dealership has given me the standard line about it being the AIR pump
and this is considered normal. I can live with an occasional momentary
dimming, but that's not what happens. When this happens, the lights blink
continuously until I either step on the gas or come to a complete stop.
I found this page: http://www.gmproblems.com/headlights.htm that describes
an alternator problem that sounds like it might be the cause - does anyone
have any detailed information on what alternators are affected, how to
determine if my car has one of them, and what replacement alternator is
best? I'm willing to buy/install it myself if I can just get enough info to
make an informed purchase.
Does the AIR pump ever legitimately get into a "rapid cycling" mode? What
is it for and how often does it normally cycle on and off and under what