2004 Tahoe 5.3 1000rpm idle and harsh 1st to 2nd

[Clarko88]

Any help would be greatly appreciated.

 

[Chrismnj]

Did you do anything prior to high idle? Like cleaning throttle body?

 

[Clarko88]

Did you do anything prior to high idle? Like cleaning throttle body?

No I just bought the tahoe.

 

[Clarko88]

Tahoe. Has 135k

 

[Chrismnj]

Any DTC codes?

Edit

Does it only idles high when you have your foot on the break?

 

[Clarko88]

No... no codes.. I took it to auto zone and no stored codes. Hes the thing it only does it when I'm going slowly into 2nd

 

[Clarko88]

Any DTC codes?

Edit

Does it only idles high when you have your foot on the break?

It always idles high the lowest it has gone is 900

 

[Chrismnj]

Maybe try cleaning IAC

 

[Clarko88]

Maybe try cleaning IAC

There is not one on this truck

 

[Chrismnj]

There is not one on this truck

Oh I am sorry, you posted in 2015+ section