98 chevy 1500 4x4 sle changing out the muffler do you need the oxygen sensor?
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?
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.
Search GMC Sierra 1500 Questions
GMC Sierra 1500 Experts