you don't
you probably have a broken fuel line that is what i had
In the exhaust line ahead of the muffler. About middle of vehicle.
drain the fuel, remove the fuel filter from inside the tank, remove the old fuel line from the filter, remove the old fuel line from the carb, pull old fuel line out, install new fuel line through the tank, reconnect fuel filter to new fuel line, place filter and slack line into tank, connect new fuel line to carb, refill tank, check for leaks.
The catalytic converter is nothing more than a wide spot in the exhaust line with some specialized material that promotes the burning of any remaining hydrocarbons. They are easy to replace but usually don't need replacing unless your engine burns oil or you have been using leaded fuel. FRONT CONVERTER IS INTEGRAL WITH MANIFOLD AND MUST BE REPLACED AS A UNIT.
It is the Oxygen sensor behind the catalytic converter.
It is blinking because there is a problem in the emmissions that is causing damage to the catalytic converter. I had this happening and it turned out to be a final warning before the fuel line broke.
If it doesn't now, it did when it came off the assembly line. They were required as of the 1975 model year.
You can remove your Chevy Tahoe fuel line by turning the fuel line swivel nuts to the left. Removing and replacing the fuel line is the best way to repair a fuel line leak.
A wrench
Remove the fuel tank fuel line. Drain the fuel from the fuel tank. Remove the fuel filter retaining plate. Remove the fuel filter. Reverse the process to install the new fuel filter.
It is in the CARBURETOR where the fuel line hooks to it, Remove fuel line with 5/8 line wrench, Then take 1 inch wrench and remove the fitting in the carb. were the line was screewed into. There is a spring and filter in there, watch how you remove it and put it back the same way you took it out.
The filter is on the carburetor ,the fuel line from the fuel pump connects to it. Remove the fuel line , using a wrench on the filter as well to keep it from turning , then remove the filter (steel) from the carburetor .