my buddy just called me and he has a 2004.5 lly 4 door dually. and just latly his truck is rattling under load. it that the cp3 pump? what other things could we check out? thats about as much info as he gave me!
Rattling under load
- Thread starter duramax215
- Start date
thats kinda vague description. could be a number of things. i chased a knocking/rattling for months, thought it was my motor. ended up being one of the intercooler pipes hitting on the heater hard line. might listen to it yourself and report back.