P59 04 2500HD Which P/N MAP Sensor?

[92GreenGT]

I know this should be a simple answer that I could find via search but I?ve become that old man who can?t use the internet anymore LOL. Turbo 2500HD, which map sensor part number do I need exactly? I?ve searched google and get mixed results with 2,2.5,3 and a 3.5(I think it was anyways) bar sensor options but different mounting style etc. Wiring doesn?t matter to me because if needed I?ll buy whatever pigtail etc but would prefer to do a 3 bar so I would have room to grow as the plan right now is 12-14psi and that puts me close on a 2bar but I could get by with a 2.5 bar if it would give me some unknown advantage elsewhere that I?m not aware of? Thanks in advance

[gtstorey]

Probably need to add the stock MAP sensor part number to have any chance of guarantee of mounting being the same.

[Alvin]

12615136 is the normal go to for those

see this link.. all the map sensors typically used

https://www.pcmofnc.com/2020/03/12/g...r-2-bar-3-bar/

[92GreenGT]

Sorry the stock one is the clip in style I?m pretty sure. I?m guessing they don?t make a clip in 3 bar since there isn?t one on that PCM of NC link?? I remember seeing something about using the Duramax MAP on a gen 3 if wanting a 3 bar, is that right?

[Alvin]

That diesel sensor isn't a good fit for gas cars. I don't remember exactly what but I think the minimum it can read is like 35-40 kPA.

[gtstorey]

Still no part number or even exact details of what the manifold came from or pictures....

But the pictures that I looked up on rockauto for 2004 Silverado 2600 6.0 liter look very similar to the 4bar 12612110 that I have in my 2.0L turbo LNF ecotec and came stock on some 2.0 LHU engines.

[TheMechanic]

MAP2-scaled.jpg

[92GreenGT]

Thanks guys


I guess my question in around about way was is there any reason why I should choose one over the other. Like is there any reason to choose the ?brick? style 3 bar over say the ls3/ls9 style 3 bar map from a tuning standpoint ie is one easier/better to tune with vs the other.

[Alvin]

It usually comes down to fitment.

The diesel sensor isn't a good fit for cars for reasons I mentioned above.
anything more than 255kPa won't work in a E40

Even if you are at the limit of 2 bar (14 psi) I'd stay with a 2 bar. The 3 bar OS's for late GEN 3 really cuts the table resolution down.

[92GreenGT]

Thank you Alvin.

I know you mentioned the limits with the e40 but would you still suggest the same 2 bar map on a p59? I?m sure I?ll keep it under 14psi for a while anyways, off to find a 12615136 map I guess. I?ve thought about seeing if you or James Short would be interested in tuning this pos because I?m not sure I really have the time to. My work has used you and James both and had great results with both. I live kinda in the middle from both of yall but I didn?t know if a gen 4 swapped 5.3(albeit 24x reluctor still, kinda a gen 3.5 hybrid lol) 2500hd with a s475 running speed density would be something yall could tune via mail order?