How many oxygen sensors does a 1993 GMC Sierra 1500 4.3L have?

[haydenramm@ymail.com]

i heard just one. but autozone sells an upstream and downstream. i have a engine light on for it. but since it doesnt have ODBII it doesnt say which one
how do i know which one it is? since there isnt anybody with an old enough scanner i have to use the old paper clip trick

 

[handyman]

Ibelieve there's going to be 3 02 sensors on your truck. one on each manifold and one right before the cat converter, if it show a bad 02 sensor on either bank one or bank two that's the one's on your manifolds.

 

[361John 04/2500HD]

04/2500HD Sierra Oxygen Sensors

How many oxygen sensors does an 04 2500HD Sierra have?

 

[361John 04/2500HD]

Where are Oxygen Sensors?

Ibelieve there's going to be 3 02 sensors on your truck. one on each manifold and one right before the cat converter, if it show a bad 02 sensor on either bank one or bank two that's the one's on your manifolds.

Where are the oxygen sensors located on the 2004 Sierra 2500HD other than in front and in back of the cat converter?