Are aftermarket sensors (carquest, NAPA) any good for our cars?
or should I pay extra for GM?

Proabably about equal quality. Usual warning against a bosch sensor or part. Otherwise.. why not?

I've had an autozone crank sensor (don't know if it had a brand name) for 4 years, no problems. I think it'* guaranteed for life, but not sure.

when it'* a "hard to get at sensor", i always go with AC. because you only want to
do it once!!

Very sound advice, Daman.

Agreed. I think we all look at the harder items as more worthy of extra time and money.

guy at Auto Zone said Wells bought out GM sensor Div. so your Auto Zone crank sensor could very well be a GM OEM.
Its $26 bucks and I kinda hate to pour more money into something thats damaged so easily by a belt. Maybe if I design a shield and its protected I would feel better about it.
My broken sensor only had about 22k on it. Ouch......

For something like that, I'd go for the oem replacement.

What!!!!!!!.........i think the guys smoken crack!!!,
was just at my GM parts garage today BSen and he never said nothing of the sort.