Throttle Body Cleaning

I have a '01 Denali with a rough idle when cold, seems ok when warm.

I've seen a few comments about cleaning the throttle body to remedy this. I've never done that. Can someone hit me with those oh so helpful tips that make these boards a goldmine of info? :confused2:

Grab a can of throttle body cleaner from your local auto parts store. Make sure it is for throttle bodies and not just carbs. The difference is that the throttle body cleaner is much safer for the sensors (TPS, IAC, etc) than carburetor cleaner.
Remove the air cleaner assembly to gain access to the throttle body (TB).
Spray the inside of the TB in front of the butterfly (throttle plate) and on the butterfly plate. There should also be a small air bypass passage in the upper left hand corner of the TB bore. Spray around there also.
Wipe with a clean, lint free cloth. Then you can spray some cleaner on the rag, manually and slowly open the throttle plate, then wipe the edges and the backside of the plate.
Remember to re-install the air cleaner assembly before starting the engine.

Any buildup around the edges of the plate or in the bypass passage can lead to a rough or uneven idle, especially at initial start-ups.

Thanks JK, I knew you'd come through. It's now on tomorrow's to do list.

i have 02 yukon XL... same thing.. only at warm up. I will clean butterfly this weekend and post results.

You know what GMshould do? A 1 ton Yukon/Suburban with the duramax.... dude with the Allison? ya

I dont' see why they dont! the excursion offers a diesel doesn't it??

Rwayne said:

...the excursion offers a diesel doesn't it??

Click to expand...

You mean that Ford did (past tense), when they made it (stopped in 2005). Lots of interest here and elsewhere in a Duramax Hoe-Burb/Yukon... GM is definitely listening, whether or not they will offer it for real, who knows...

ya.. I dont' have the need for it anymore.. But man it would be nice.. all that cargo room yanking around a loaded 24ft trailer! Makes since to me!