A short to ground. Check wiring/sensor for damage.
Depending on which engine you have, there are several O2 sensors on the vehicle and they are all threaded into the exhaust at various points.
Bank 1, on a 4.3 L engine would be on the drivers side.
There are several O2 sensors on that vehicle and they are all threaded into the exhaust system at various points.
All O2 sensors are threaded into the exhaust system at various points.
Depends on which engine it has and what year it is.
Haynes makes a manual with the wiring schematic for the O2 sensor on a 1991 Chevy Blazer S10. The manual can be found at most book stores.
There is more than one O2 sensor and they are all threaded into the exhaust system at various points.
That would be the O2 sensor after the catalytic converter.
There several O2 sensors on that vehicle and they are all threaded into the exhaust at various points.
No, the O2 sensors are out of the "loop" until the engine warms up.
Assuming this is a V-6, bank 1 sensor 1 would be the first O2 sensor in the exhaust on the drivers side of the engine.