2019 and up GM

[KRT]

2019 is split year for the Silverado. The “new” body style has the L84 engine. L84 is dynamic fuel management and not active fuel management. The difference is active fuel management kills 4 cyls (2 cyls per side) and the dynamic kills any of the 8 cyls one at a time or up to 4 but all 8 cyls have “special” lifters instead of 2 cyls per side having “special” lifters.

Now rumor has it dynamic fuel injection is perfected active fuel management.

We have a 2020 in with 67k miles. Complaint is misfire and tapping noise. Local GM dealer ship which he purchased the truck told him he needs all lifters and possibly a camshaft. They can pull the head and inspect or replace engine at 18k price tag.

Waiting on approval as he’s a member on here but the plan is to pull passenger side head and see what’s going on with cyl 6.

I’ll keep everyone updated. This will be our first dynamic fuel injection tear down. Ironically companies already have full mechanical deletes for this engine. LS style lifters and solid lift cam and tuning to cut off dynamic fuel injection.

[beanhunter]

How bad does that affect mpg?

[DRDUCK]

No wonder they cut the milage for powertrain to 60K.

[darealdeal]

I put a chip in that deletes the DFM/AFM, auto start stop on my 2020 Chevy. Did 10,000 miles without it and average was 16.9 mpg and now after 11,000 with it average close to 18.

[smitch320]

I just got a ‘22 because my 19 with 144k lost #3,6, and 8.

[KRT]

How bad does that affect mpg?

I’m not getting into all that but imagine if I told you at 67k it was going to be 18k to fix your truck.

I’ll have a quote and an exact price for us to fix it in the next few days.

[carolinadrifter]

Damn all of these threads and I can’t fathom why someone would still buy a GM product.

[adamb61085]

Damn just got the wife a 21 suburban with 60k on it. Glad i made them throw in a 3 year 36k drivetrain warranty.

[Biggie1976]

Disappointing to continue to read these threads

[Coastal Woodie]

I just bought a 21 6.2L with 12k miles on it. I disabled DFM and auto start/stop as soon as I brought it home. I’m hoping it’ll hold up as well as my 2018 did but it has a 100k mile power train warranty.

[smitch320]

Damn all of these threads and I can’t fathom why someone would still buy a GM product.

Company vehicle for me. My personal vehicle is a Toyota, and will always be a Toyota, lol.

[carolinadrifter]

Company vehicle for me. My personal vehicle is a Toyota, and will always be a Toyota, lol.

Nice! All I’ve ever owned are Toyotas as well. On my second Tundra now.

[Campbeller]

Let us know if you can do the DFM delete.

[KRT]

Let us know if you can do the DFM delete.

We can definitely do them.

[Coastal Woodie]

Slightly off topic but have you seen many issues with the new 10 speed GM transmissions?

I’ve been surprised with how much cooler this one stays compared to my old 6L80. I even had the thermostat deleted on my old one.

[Campbeller]

We can definitely do them.

Hell to be honest I can't even tell if my wife's 22 suburban even has it?

[KRT]

It does

[KRT]

Damn all of these threads and I can’t fathom why someone would still buy a GM product.

My wife wanted a Range Rover. I talked her into settling for the next piece of shit and got a new Tahoe.

[Smilee]

Delete the 3.0L d-max yet KRT?

[DRDUCK]

Damn all of these threads and I can’t fathom why someone would still buy a GM product.

Go buy a ford and get back to us at 67K unless it is a 302