Question

1999 Chevrolet Tahoe 5.7L with code P0141, where is bank1, sensor2 located on the vehicle?

Answer 1

it shows two different model light duty and heavy-duty, you will have to look at your exhaust and see how its setup compared to the two pictures below

Heavy-duty picture below

Answer 2

P0141 CHEVROLET - O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 2

Read more: https://www.autocodes.com/p0141_chevrolet.html