Just out of curiosity i have a high pressure pump out of a 2008 gmc 3500hd thats going out but still works i am curious if it will work on my 2005 chevy 3500 that i believe the pump is out on. does anyone know if they are pretty much the same or if it would work or is it totally different?
high pressure pump
- Thread starter Furlong2022
- Start date
Not the same pump. See here https://thedieselstore.com/replacement-parts/fuel-injection-pumps/chevy-gmc-duramax.html
thank you thats honestly what i figured i just figured it was definitely worth a shot i dont want to throw a crap ton of money into a truck that i personally never heard run
When I compare the pictures from the link I posted, there are inlets/outlets present on the LBZ-LMM pump that are not on the LLY. Sure doesn't look look like the same pump to me.
01-10 CP3 for a Duramax are physically interchangeable. The difference that must match the tune is the regulator.
What’s the actual fuel rail pressure supposed to be on the rail? I’ve been told many different things mine doesn’t build anymore then about 170/180 psi which I know is low I have to prime my system before I can even try to start it which I’m pretty sure is my injectors due to getting diesel into my oil
Agreed. Usually when I see an LLY getting fuel in the oil the main culprit is the front seal on the CP3.
It is possible for the injector to be hanging partially open and draining rail into the cylinder after shut down but that's not a very common failure mode on the later generation trucks.
So really when I pull my cp3 out that could be the culprit for both issues the no start and the diesel in the oil
Possible? Sure
Guaranteed? No. To 100% solidify what the issue is you need to further diagnose. To check the front pump seal, pull the oil fill tube or put a camera down in there and see if you can see fuel spraying behind the CP3 drive gear.