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***Reduced Power Engine (Warning Light)*** 2003 Silverado 1500HD***
Check your throttle body/ valve..... I have a chevy silverado 2003 HD and when I noticed this warning, i had no forward power and when i did it was very minimal. Also, my truck started to idle very hard almost like a mild shake. Remove the air intake hose that runs from your air filter box to your throttle body housing. Once removed, use carburetor or brake cleaner and spray into the throttle valve. During this process, make sure to open and close the valve as well as wiping away any excess.
If your vehicle has trouble starting after this, give it a few minutes for the excess vapors from the spray to evaporate and then the vehicle should start right up.
Hope this works
What else can I help you with?
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