help with potential pass lock issue?

[SteveCZ28]

I was sitting in my truck tonite idling in the parking lot before I went into work. listening to music as I normally do for a few minutes. as I was sitting, I randomly had a lock looking light pop on my dash. ive only seen this light if im outside the truck, and lock it. ill see it pop on for a few seconds and shut off. I googled for the light that was on my dash, as I didn't know exactly what its called. and saw some threads related to it as passlock? I don't know if im about to have an issue with it, or what. or if it was just a flook that it came on for a minute or 2.
I do have another thread about a crank no fire issue, but that is normally resolved by swapping ignition relay out. don't know if theyre tied together as when the truck didn't start, I never had this lock light on my dash.

 

[retiredsparky]

A failing battery can cause weird electrical symptoms that are not logical.

I have had an equinox and a duramax equipped pickup both have strange electrical problems. Changing out the batteries fixed them both. I think that loose internal battery connections can create electrical "noise" or interference in the various computerized modules in these vehicles.

 

[SteveCZ28]

i don't know if the battery is weak or not. the truck starts fine, and doesn't pull down hard. and my volt meter in the dash stays in the same area

 

[retiredsparky]

The battery does not have to appear weak to cause problems. A battery or alternator can have internal problems which can cause strange symptoms. I suppose as a last resort, you could try changing out the battery if nothing else works. In your other thread you mentioned a problem with intermittent starting problems.