I have a 2000 blazer with 60k miles.
The truck seems to have a faulty power or ground. From the time to time the
Trans control module loses power causing a reset.
I can see the 4wd selector switch lights go out then come back on. I have
seen the lights flicker during the TCM lamp test. The lights finally will go
on, the problem then goes away for a while then comes back.
The problem is very intermittent. Any advice is greatly appreciated.