How do you find exhaust leak on 2009 silvarado?
If you fallow the exhaust pipes you'll see a black stain around the leak usually around joins.
Have someone hold a rag over the exhaust pipe to block the exhaust while the engine is running, you will hear the leak get louder and it will be easy to pin point the leak.
Question is should you be driving a car with an exhaust leak? Get this repaired ASAP. It is very dangerous to drive a vehicle with an exhaust leak. Carbon Monoxide is a odorless, tasteless, killer even in small amounts. It will leak into your car, and put you too sleep. After the leak is repaired the question becomes mute.
Where might exhaust fumes be coming from that are getting into the vehicle through the 4x4 shift boot?
The leak can be from a cracked manifold, or from a bad gasket where it attaches directly to the engine. This leak is before the O2 sensor, so gives a false reading and may remain undetected. This is a serious issue! Exhaust leak from the manifold will allow the harmful CO2 emissions to enter the cabin. Exhaust leak will also cause decreased performance of your engine, and decreased fuel economy.
A manifold leak is usually in reference to a failure of the intake manifold gasket. It can leak air, oil or coolant. It can leak to the outside of the engine or internally into the engine. A manifold leak may also refer to the Exhaust manifold that is leaking exhaust fumes from a bad gasket or a crack in the manifold.
It could be you have a very slight heater core leak, and the leaking coolant is irritating your eyes. It could also be you have an exhaust leak, and the exhaust is the culprit. Can also be a growth of bacteria in the vents. Have your exhaust checked for a leak as this can kill you. Remember carbon monoxide is odorless and tasteless, but it will kill.