I just replaced a faulty sensor on my 2004 GMC, and although not all trucks are the same, here is the correct answer for my application and probably most similar vehicles (Tahoe, Sierra, Yukon, Escalade, etc) with the same drive train 4.3/4.8/5.3l.
The system is setup almost like you would expect:
Bank 1 Sensor 1 - Driver's side, before catalytic converter
Bank 1 Sensor 2 - Driver's side, after catalytic converter
Bank 2 Sensor 1 - Passenger side, before catalytic converter
Bank 2 Sensor 2 - Passenger side, after catalytic converter
I searched around forums to find this answer, but no one was for sure and couldn't find it in their Chilton's or similar manuals. I disconnected each one, used my engine code reader to see which error was thrown after disconnecting them successively, and through process of elimination came up with the above information.
it is screwd into the exhaust somewhere near the converter
Bank 2 is the side of the engine where the #2 spark plug is. On my 99 Silverado it's on the passenger side.
That would be the passenger side of the engine and it will be the first oxygen sensor that's screewed into the exhaust pipe on that side.
Bank 2 would be the passenger side of the engine, so the first O2 sensor threaded into the exhaust leading from bank 2 would be B2 S1.
Bank 1 is the drivers side of the engine. #1 o2 sensor will be the first sensor that is in the exhaust pipe that's closest to the exhaust manifold on drivers side head.
Bank 2 is on the passenger side on a Chevy V6 or V8.
behind the converter on left side
It's the sensor after the cat on the passenger side
Bank 1 is the drivers side of the engine and bank 2 is the other side.
Bank 1 on a Chevy is the drivers side. Sensor 1 is located in front of the catalytic convertor and sensor 2 is after the converter. Each side has 2 O2 sensors.
drivers side second one back by transmission
Trouble code P0141 means:O2 sensor heater circuit malfunction (Bank 1 Sensor 2)
Bank 1 is the exhaust pipe on the drivers side of the engine, and the other side is bank 2
Bank 1 is the drivers side of the engine and sensor 1 will be the closest O2 sensor thats in the exhaust pipe where it bolts to the engine exhaust manifold.
Find cylinder one, usually on the driver side. That is Bank one side, then go to the second O2 sensor, which will be the one after the cat converter.
Oxygen O2 sensor Heater Circuit Malfunction (Bank 1, Sensor 1) Should be drivers side closest to engine.
Bank 1 is the bank of cylinders that has contains the number one cylinder which in your case would be the drivers side bank of cylinders. The O2 sensor for bank 1 sensor 1 is located in the exhaust pipe directly after the drivers side exhaust manifold.
bank 1 sensor and bank2 located under air intake (plenum) on top valley of 03 6.0l 364 gas Chevy engine.
Trouble code P0330 means: Knock Sensor 2 Circuit (Bank 2) Replace the knock sensor
Bank 1 is the side of the V8 or V6 engine where cylinder #1 is located. On Chevy engines that is on the drivers side.
All O2 sensors are threaded into the exhaust system at various points. Bank 2 on that vehicle would be on the passenger side of the engine. Bank 2 sensor 1 would be the first O2 sensor in the exhaust system on the passenger side.
05 Chevy avalanche sensor 2 bank 2 located?
Both B1 and B2 knock sensors are located under the intake manifold of which has to be removed to gain access to them.
Usually bank 2 sensor 1 & 2 are right after the converter in the exhaust pipe.
Unplug the electric connecter and then get a wrench that fits it and take it out of the exhaust pipe.