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GMC safari has twoconverters
in exhaust pipe in front of muffler / catalytic converter, changed mine yesterday.
Catalytic converter plugged.
Not legally
If it came from the factory with a converter then it needs a converter.
= How do you replace the rear dutch door latch on a 1997 gmc safari?" =
There are usually two of these sensors, both are located on your exhaust system, one before the catalytic converter and one after the catalytic converter.
How to replace o2 pre converter gmc 1500
no
Check heat shield on catalytic converter
If the 5.3L is the same as my 4.8L, which it probably is, there is one located upstream from your catalytic converter, and one located downstream of your catalytic converter. They are not that far from the cat. There is 2 on each side; 1 set for each catalytic converter. 4 in total.
possibly a clogged catalytic converter