2000 Chev Impala, Base model.
Every 20th time or so I try to start the car (no real pattern to it), the
car will not start. No engine sounds at all. On the Message Center, I see
the red battery light, then the yellow security light flashes six times,
then back to the red battery light, and so on. This will go on for ten
minutes, then the security light will go solid, and the car starts fine.
When I took it to the dealership, they pulled the engine codes, and I was
told that I needed to replace the Body Control Module, which was messing up
the Anti-Theft on the car. $500 bucks latter, the problem still exists.
Now, they want to replace the key tumbler and starting module, which is
another $500. Strange thing is, about a year ago, I had an ignition coil go
bad. The shop replaced that, and did a full tune up, and for several
months, the car started fine. Then the problem came back, and with the
onset of the cold weather, seems to be happing with more frequency. When I
asked my normal mechanic (not the dealership) about the relation between the
tune up and the problem going away for a while, he insists there is no
correlation. I'm told that there is an issue with the tumbler/ignition
module and the anti-theft system.
Any ideas? I'd like to get a better handle on this before I drop another
$500, which may or may not solve the problem.