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Old Yesterday, 07:35 PM   #41
Last2Die
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Originally Posted by beeje View Post
Mlh, The duramax has a Denso fuel system since 2017 with the l5p motor. I think GM got tired of blown up CP4 fuel pumps.

Fare warning to all Ford guys, Ford still uses the CP4 pump which is known to explode and destroy the entire fuel system in the process.

If I am not mistaken, Dodge has now gone from the CP3 to the CP4 pump on the newer trucks.
I think I can add some more information to the CP4 fuel pump. I had a 2015 but never had any problems. In the Chevy I added diesel fuel treatment which added lubrication to the pump. In the fords, Ford decided to use a coating on the fuel pump to help it from the lack of lubrication. Iím sure at some point they will all go out but doing my research this is what I found out.
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2020 GMC Denali 3500 4x4 Duramax, 10 speed Allison. LB SRW, Firestone air bags with Airlift wireless onboard compressor. Anderson Ultimate Hitch. MX4 folding cover
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Old Yesterday, 10:49 PM   #42
beeje
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Originally Posted by Last2Die View Post
I think I can add some more information to the CP4 fuel pump. I had a 2015 but never had any problems. In the Chevy I added diesel fuel treatment which added lubrication to the pump. In the fords, Ford decided to use a coating on the fuel pump to help it from the lack of lubrication. Iím sure at some point they will all go out but doing my research this is what I found out.
Yeah I hear you. I use Opti lube for many years before I found out about the class action lawsuit going on about them pumps. That's the main reason I traded in my 14 on the current 18 I have.
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