Hey Guys, 2005 C4500 dump truck. 6600 Duramax I hit a pot hole this am on the way home, & after everything stopped flying around the cab The truck went into limp mode, NO codes / ses light on display. The last time the ses light came on it was a fuel filter, this time no light. I'm ASSSSSUMING if it was an injector or something like thast it would throw a code, Correct? Any help would be greatly appreciated.
Some info I forgot. In park it idles just a scoche higher than normal. If I tap the brake it idles down till the brake is released. This is not the same high idle when it's cold out.