Not sure but a 1991 model does, so it stands to reason that a 1990 would.
I am assuming that you want to know where the Catalytic converter is in your 1990 Cadillac. it is underneath the car, silver color (or rust) welded to the exhaust pipe about the center of the front seat floor.
by wackin it ;)
YesYes
there isn't one
loss of power.noise rattling from exhaust
Partially clogged or engine misfire.
This light is indicating a emissions problem or failure. The catalytic converter may be operating at low efficiency which is a sign of failure.
AnswerCrawl under the car. You will see a muffler, and a catalytic converter which look similar. The converter is the one closest to the engine.If it's a 4 cyl. It should be between the exhaust manifold and engine pipe.
Because it liked screaming at your mice while it was shirtless.........
It sure did, That is the law on all makes and models.
1990 was the last year Chevrolet made Celebrities. If you mean catalytic converter they look like a muffler, some have bolt on flanges.
Plugged fuel filter? Plugged air filter? Plugged catalytic converter?