[Beastmaster]

There's various CTIS valves and assemblies that you can find. We need to identify which one.

If you have the stock CTIS assemblies, you need to:

1) Ensure that your CTIS is set to the "neutral" position. This means that on the manual selector ones (a knob based selector), it's set to off or none, and on the switch settings, it's set to the middle posititon.

2) Go to each tire, and pop the CTIS tab. It will move away from the spindle by about 1/4". This will isolate the air from each other. Take a 5/8" socket and remove the CTIS covers.

3) On the tire you're changing, take a 3/4" wrench, and remove the CTIS disconnect fitting. Be careful and do NOT bend the tab.

4) Loosen (and do not remove) the 8 lug nuts.

5) Jack up the truck

6) Remove the remaining lug nuts

7) Remove the tire.

The second type is a CTIS quick disconnect that does NOT isolate the tire on the opposite side. You need to:

1) Isolate and disconnect the CTIS line on one side.

2) Isolate the tire on the other side by disconnecting the CTIS line.

3) Jack up the truck, remove the lug nuts, remove tire.

The third type (and the most popular) is the GT/Cepek style CTIS disconnect. This will isolate each tire by itself when you disconnect it. You need to:

1) Disconnect one tire

2) Jack up the truck

3) Remove the lug nuts, remove the tire.

It sounds like you have the stock CTIS lines.

Hope this helps,
Steve