2000 Chevy Silverado service engine light?

Yes, it is very possible that the Bosch sensor was defective. It is more likely that its quality was inferior though. These sensors have little tolerance for any resistance changes which is basically what all sensors are doing. There is also a heater element inside all of GM oxygen sensors to get them hot very quickly. This could have been the source of the error code as well as it is monitored by the PCM. I never used any other product in my career when it came to me choosing what to use other than GM stuff. That is mostly because it was handy but I did experience aftermarket stuff when people asked to use it. I usually had an unhappy person with the same problem that the aftermarket sensor caused. It does sound stupid, but not all parts work the same and in electronics you should stick with the person that you brought to the dance. The parts are competitively priced more often than not. Phone next time to get a quote. Good luck.

if the failed signal followed the sensor then yes its the sensor. it could have been damaged during shipping or even dropped off the shelf who knows.consider the fact that if you would have bought the gm sensor it probably would have been cheaper than the bosch+the dealer charges.i have a shop and i only use factory sensors and switches due tothe standards are higher for production of electrical products also vehicle computers are very specific on signal strentgh.best bet buy it from chevy

First, I agree with tommy44432. AutoZone is independent and will test it as many times as you want, free of charge.

As far as Bosch goes, I've never had a problem with their stuff. Sometimes you just get a bad part. Happened to me with a power window motor. Fought that thing for 2 hours on the install, and then the thing didn't work. Sometimes, defective parts make it out for resale.

it was probably just a bad sensor, but you would have saved time and money gettin a gm one. original equipment is always better the aftermarket stuff works but usually doesnt last nearly as long, you get what you pay for. CHEAPER=CHEAP

I like duct tape myself,i dont thing the duct tape is your troubles.Remember that a misfire could mean that you have a bad fuel injector or a loose connection . Abad connection to one of the fuel injectors ould cause the check engine light to come on and off.

Before I'd try anything else...I'd take the thing to an Auto Zone and let them read the codes again. It's free and they are independent...not a dealer trying to sell you something.

sir replace map sensor at same time as you replace oxy sensor // the light // reset light will go off and stay that way had that same problem on exact same vehicle

You should make sure they changed the right sensor. Is it upstream or downstream?

most likely just a defective part happens all the time