Disconnect the negative cable from the battery,
Remove air filter housing,
Relieve fuel pressure, wrap a shop rag around fuel line fitting before you loosen it,
Disconnect vacuum lines, electrical plugs, throttle cable and fuel lines from throttle body,
Remove bolts holding the throttle body to the intake manifold,
Remove throttle body,
Remove all of the old throttle body gasket material from both surfaces,
Reverse procedure to install.
The throttle body base gasket would be located between the throttle body and the intake manifold.
You will need to remove the throttle body and replace the throttle body gasket. The throttle body gasket can be purchased at most auto-parts stores.
Check the throttle body over carefully to find the leak. If a gasket is leaking then a new gasket set will stop the leak. If the body has a crack then you will need to replace the throttle body.
Disconnect negative cable from battery, relieve fuel pressure, disconnect throttle cable, disconnect fuel lines, disconnect any vacuum lines, disconnect electrical plugs, remove bolts holding throttle body, lift off throttle body, remove damaged gasket, clean area, replace in reverse order.
How do you replace a throttle body on a trailblazer 2002
Between the throttle body and the intake manifold.
Is it easy to replace a throttle body in an 88 sentra? How do you clean a throttle body
It's under the throttle body. To get to it, you'll need to remove the throttle body and flip it upside down. The IAC valve is mounted by two screws to the throttle body, and it has a gasket that you will need to replace if you remove the IAC valve, so make sure you have a new gasket on hand if you intend to take off the IAC valve.
follow the air induction to the throttle body. it is right behind it in front of the fire wall. good luck I believe this model is the same as the 95. In that case, pull the throttle body off first. 4 8mm bolts and it is very easy to work on. You don't have to disconnect the accelerator cable, you can just move the TB to the side. There are 2 screws that hold it in place. You should also replace the gasket for the TB.
Should be able to just unbolt the valve cover, remove the old gasket clear the surfaces with a rag and reinstall. Might have to disconnect the throttle/trans kickdown cable from the throttle body for room.
Its most likely a Throttle body Heater ($75 part, easy replace.) It could also be a radiator or head gasket.
If it is similar to the 2002, and I believe they are, It is permanently attached to the throttle body. To replace the sensor, you have to replace the whole throttle body.