O2 sensor replacement

[Tailgunner762]

Hello, I'm new to the gmt-400 platform and was wondering what went into replacing the o2 sensors on these trucks.
I have 98 k1500 5.7 vortec, thanks for your help!

 

[kamokevin]

Hello, I'm new to the gmt-400 platform and was wondering what went into replacing the o2 sensors on these trucks.
I have 98 k1500 5.7 vortec, thanks for your help!

Unplug it from the harness, unscrew it from the pipe, screw new one in then reconnect the harness. Make sure you pay attention to pre-cat and post-cat though.

 

[volunteerff21]

If your new oxygen sensors don't come with any, buy some copper anti-seize to use when installing the new O2's.

And as mentioned above, pay attention to pre and post cat. IIRC the electrical plugs between the two are different.