Where is the O2 sensor and crank sensor located on a 91 Chevy Lumina 31L and is it fairly simple to replace yourself?
I have a 92 lumina with a 3.1 and I found the crank sensor to be
located on the passenger side of the engine in the back of the
engine NOT on the side of the engine below the knock sensor. Hello,
in my experience, all O2 sensors are located in the exhaust just
after the manifold. It appears easy enough to change. If it is the
crank position sensor you are looking for, take a look around the
main pulley at the bottom of the engine, you may see a square-ish
component located close to the actual pulley wheel, this would be
the crank position sensor, it should have wires connected to
it.