Is the 2022 Chevy Silverado 2500 HD 6.6L Duramax Diesel L5P a good engine ? I review this Chevy 2500 with the Duramax Diesel as a Heavy Duty Mechanic and give you guys my opinion of this engine. Should you guys buy this engine over a Cummins 6.7?



I hope everyone is having a good week! I got the pleasure of driving a new 2022 Chevy 2500 HD with the powerful 6.6L Duramax diesel in it. And I'm excited to tell you guys all about this engine.

so right off the bat. GM had many issues with their past Duramax the LML including a lot of DEF issues and DEF pumps failing. NOx sensors failing. but most importantly they had massive fueling issues because of the CP4 fuel pumps failing. thankfully GM had completely upgraded the fuel system and after 5 years of real world experience is seems to hold up very well.

The next good thing about this engine is when it came out in 2017 GM really beefed up the internals. the block was re-enforced, the crankshaft is forged and thicker. the rod journals are thicker. the pistons are stronger so lots of good stuff there.

the other great thing about this engine is the lack of emission related issues. modern diesel love to have tons of issues with their emission systems but GM has managed to really make this emission system work well and that's a great thing for engine reliability!

now some issues about this Duramax diesel engine.

the first thing is the MAP sensor issues. thankfully this is a very easy fix and anyone can do it. basically the MAP sensor becomes clogged with EGR soot and therefore can't properly read the amount of air going into the engine. the best way to deal with this is clean it with MAP sensor cleaner and it takes about 5 minutes to do !

the second issues if the #4 injector issues. the connector for whatever reason fails and causes a misfire. the best way to deal with this is to get a gold plated connector and that seemed to solve the issue.

the third issues has to do with the DEF headers in colder climates. no real fix here other then replacing the part unfortunately

the fourth issues is when it comes to engine tuning! these ECM's on the Duramax L5P took year to crack and therefore if you want to delete these things they are expensive!

Anyways guys I hoped you liked my Review!



00:00 - Intro
02:35 - L5P Duramax Power Numbers
03:18 - Duramax Past Fueling Issues (CP4 fuel PUMPS)
04:29 - GM's New Fueling System (Denso HP4 Pumps)
05:14 - Duramax New Better Injectors (Denso Injectors)
05:56 - Duramax New VGT Turbo
07:02 - Duramax Internal Strength Gains
08:07 - New DEF Tank Location
08:25 - Duramax Reliability
09:12 - Max Torque Curve
10:21 - Emission Issues
11:19 - Duramax MAP sensor Issues
15:34 - Duramax #4 Injector Issues
16:46 - Duramax Diesel Exhaust Header Issues
17:38 - Tuning Issues
19:16 - Engine Bay issues
20:15 - Concluding Thoughts on Duramax