98 chevy 1500 4x4 sle changing out the muffler do you need the oxygen sensor?

Asked by Dec 21, 2015 at 02:11 AM about the 1998 GMC Sierra 1500 C1500 SLE Extended Cab LB

Question type: Maintenance & Repair

doyou need the oxygen sensors to keep the truck running when I change out the muffler? or can I remove them and the catalytic muffler?

1 Answer

114,825

Yes you need the oxygen sensors and catalytic converter. You can install what is called a cat-back system where everything behind the converter is replaced and if you want you can also install a high flow catalytic converter. Without the O2 sensors your engine will not get the correct air/fuel mixture.

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