headers...do i have air injection??

[Biggwaukegan]

how do i know if my model tahoe has the air injection for the headers? its a 97 4 door lt

 

[GMCYukalade]

As far as i know, the Air is something the 98, 99 has.. The 97 PCM has 5 plugs, 98, 99 has 4 plugs.. the 97 Doesnt have a Fuel tank pressure sensor (used with the air system) and the 98 99 does have a fuel tank pressure sensor

 

[Whippled2dr]

The only trucks that I've seen with air injection are 99 california trucks.

If you have air injection you would have an air pump above the windshield washer tank on the driver's side. Like this:

Also you would have tubes connected to the front of your headers like this: