there are 3 O2 sensors on the 4.3 Vortec V6 Blazer ( I have a 99 as well) 1 is on each exhaust downpipe forward of the catalytic converter, the 3rd is just aft of the converter.
I have a 95 blazer with a v6 vortec and there are 2 sensor on mine. 1 before the catalitic converter and 1 after it. Both are the same part number. They are easy to replace yourself but anywhere from $46.00 to $79.00 depinding on where you get them from. Good luck.
There are two oxygen sensor, follow the exhaust coming out of the engine. one in the front and one in the back of the engine. if you engine code p0135 bank1 these is oxygen is located between firewall and engine. or p0755 oxygen located in front of the engine
where is the oxygen sensor in a 1995 gmc jimmy
Bank 1 and 2 reference a V type engine where there would be two exhaust manifolds. The Vortec 4200 Inline 6 cylinder engine hence has one exhaust manifold and the Oxygen sensor is mounted there. (passenger side of engine).
oxygen sensors are located just forward of your engine. In front of the engine is the catalytic converter. At the top at the bottom are your oxygen sensors.
They are all threaded into the exhaust system at various points.
I have a code DTC P0154.Bank 2 Sensor 1 no activity.Which sensor is this on my 96 Blazer?
They are screewed into the exhaust pipe / pipes. Start at the engine and work your way back to the muffler. There is only 1 on that engine, It will be up close to the engine.
The oxygen sensor is on the Right side (passenger)exhaust look under the vehicle and you will see it. On my 93 Blazer it is located in the pipe leading to the muffler right after the left and right pipes meet and it is on the top of the pipe pointing at the floorboard.
the oxygen sensor in located in the exhaust manifold under the intake manifold at the back of the engine