Oxygen Sensor Question
Thread Starter
Le Mans Master
Joined: Aug 2000
Posts: 5,808
Likes: 1
From: Sierra Foothills California
Oxygen Sensor Question
Knowledge base is greater here than a truck forums! 
The question is about my 1997 GMC truck 5.7 460L) I replaced both front 02 sensors after getting a code. I'm wondering if I should also replace the downstream sensors, or is it a waste of money. It seems to run just fine now!
Thanks a bunch!
The question is about my 1997 GMC truck 5.7 460L) I replaced both front 02 sensors after getting a code. I'm wondering if I should also replace the downstream sensors, or is it a waste of money. It seems to run just fine now!Thanks a bunch!
Last edited by Vettman 1; Dec 22, 2015 at 10:16 PM.
Thread Starter
Le Mans Master
Joined: Aug 2000
Posts: 5,808
Likes: 1
From: Sierra Foothills California
Thanks! I thought maybe replacing all 4 at the same time might improve mileage a bit (for about $60 bucks). The original code was just for the r/h upstream which took care of the problem.
Last edited by Vettman 1; Dec 22, 2015 at 11:24 PM.
