O2 Sensors...are the factory replacements better?

[Mtndewd]

Hey all...
I'm thinking about replacing the O2 sensors on my 99 Tahoe to hopefully get rid of the engine stumble at 65 MPH. The price I was quoted at my local dealer was $438.00 for all four. I also found some universal sensors online for $28-$30.00 each. Is there any difference between the GM sensors and the universal.
Cheers...

 

[NYrr496]

I swapped out my originals with Bosch units at 100,000 and again at 200,000. They weren't universals, though. They were plug ins. Cost 65 bucks apiece.

 

[Mtndewd]

Thanks for the info!