After cleaning the throttle body, RPMs jump to 3,000 after driving for 30 seconds?

2012 CHEVROLET SILVERADO
241,000 MILES • 5.3L • V8 • 2WD • AUTOMATIC
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FRESH8686
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While still connected, the throttle body was cleaned, and the butterfly was opened manually. After reassembled the RPMs immediately go up to 2,500 and cannot get truck to move. If put in gear it does not engage at all. I included a video. It did go down in the video buy if I drive it after 30 seconds or so the RPMs jumps to 3,000 and the vehicle will not continue to drive, it's like it's in neutral.
Feb 23, 2025 at 2:54 PM
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STRAILER
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Yep, they don't like to be opened manually, we just leave them shut and clean around the bore the best we can or reprogram the throttle body. The truck won't drive because it is in limp mode.

This guide can tell you more:

https://www.2carpros.com/articles/reduced-power-limp-mode

Here are the instructions on how to do the job correctly. Clear the codes before you begin. Check out the images (below). Please let us know what happens.


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Feb 24, 2025 at 1:48 PM
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FRESH8686
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So the codes I'm getting for solenoid c in the transmission is because of the limp mode, correct?
Feb 24, 2025 at 6:45 PM
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FRESH8686
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My truck will not go more than a few yards before it completely becomes unresponsive (meaning it feels like I'm in neutral) and doesn't respond to me pushing the gas. I thought you could still drive in limp mode.
Feb 24, 2025 at 6:47 PM
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STRAILER
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In some conditions "limp mode" will not let you drive, and this all happened after you cleaned the throttle body, correct?
Feb 25, 2025 at 9:40 AM