3.0 Duramax opinions/experience??

[Perrin713]

Mines back in the shop today. If they can work out the problem for good this time Im tempted to keep it. I love the truck and I want to love the motor too.

That's a bummer. I'm going on 7 weeks straight for the "4th repair". I'm over the 3.0 and GMC. Looking at replacing with a Ford depending on how things pan out.

 

[wnelson14]

I’ve got one of the 2024 LZ0 baby max’s and so far I love driving it. The torque delivery and smoothness is impressive. However, I did have a short in the wiring harness due to a hose clamp rubbing through three wires. That was a pain and cost me a week of not having my truck, but hopefully that’s the only issue for the next while.

I had the exact same issue on my 2023, 8 weeks (total down time on and off) later GM purchased the truck back for a very very very very very reasonable price.

 

[wnelson14]

That's a bummer. I'm going on 7 weeks straight for the "4th repair". I'm over the 3.0 and GMC. Looking at replacing with a Ford depending on how things pan out.

You should call GM customer service, around 8 week down time is there sweet spot for making you a repurchase offer.

 

[Perrin713]

You should call GM customer service, around 8 week down time is there sweet spot for making you a repurchase offer.

I got a Lemon Law attorney. Honestly at this point I'd love to just get my money back and not buy another GM product.

 

[tdhanses]

Mines back in the shop today. If they can work out the problem for good this time Im tempted to keep it. I love the truck and I want to love the motor too.

What’s your issue?

 

[Parkerpusher]

What’s your issue?

Just goes into limp mode. Last time it acted like it ran out of fuel, they replaced the fuel pump modulator and ran good for a few days. This time, I took it back as soon as the check engine light came on and the reduced speed in 174 miles came on the dash. Don’t want to be towed off the side of the road again.

 

[manitou1]

A lot of issues are popping up with the 6.2's. It's look at the 5.3 personally. I've been in 6 loaners since the beginning of December. 2.7's and the 5.3. Depending on what happens with the 3.0, I'll probably go back to a 6.6 Duramax or the 5.3 gasser.

My 5.3 gasser crapped the bed at 68,000 miles. Maintained immaculately.

 

[jakeller27]

I hope this isn't the start of a new issue, but after getting my harness fixed, I'm having intermittent infotainment issues. The main screen seems to lock up if I go into reverse too quickly after starting. I can occasionally restart it and it'll come back on, but it's a pain in the butt.

I had 80000 miles of trouble free running out of my Tundra that I traded for my wife's Suburban, and here I am with two Chevys that have already scared me a couple times...

 

[Chet4570]

6.6 gas having big issues too per my contacts and acquaintances at GM dealers... Just priced one for a guy with a 2020 2500hd with 130k...meticulous maint record, cam/lifter failure with piston to valve contact...You can buy a brand spanking new long block from GM for under $2500...the catch is there is a $7k core charge. Im told this is typical practice when GM is eating alot of them under warranty and wants to reduce costs and needs cores to rebuild.
I hear alot of horror stories of gm vehicles under warranty stacked up waiting on back ordered parts from techs and parts dept guys I talk to first hand. When the people that work there openly and honestly tell you they don't know how GM is still in business...that speaks volumes to me. I hear the same from guys a Hyundai/Kia.

As much as I dislike stellantis for numerous reasons, the Ram 1500s have been pretty solid. Transmissions holding up better than either ford or GM. 5.7 and 3.6l have been good overall...other than 3.6l eating cam shafts now and then. Few lifter/cam failures on 5.7l but not as prevalent as GM.
I've seen way to many people get bit with major engine and/or transmission failures on GM trucks and SUVs with AFM ls and LT series engines and 6,8,10L trans right around 100k miles to ever be confident owning one out of warranty.
Lately it seems GM and stellantis are in a competition to see who can run out of parts to support their products the fastest.

The auto industry as a whole is in bad shape from a value/reliability standpoint across the board. It's pretty disheartening honestly. Cost of ownership has gone up exponentially while quality and longevity have decreased.

As for 3.0L duramax, I've not seen alot of them yet. They run strong. Mileage is good, but not that great considering diesel costs more most places. The only two I have long term(over100k miles) first hand experience with have had major engine or transmission repairs under and out of warranty. Both have since been unloaded. I forsee parts supply issues given GMs track record and the relatively small % of vehicles produced with that engine vs other options. Long-term They will likely expensive to keep going and harder to find parts for than gas counter parts...I would consider other options, not that there are really any great ones out there presently IMHO.

Wife has a '21 Ram 1500 with the 5.7 hemi. Zero issues but only 21k miles. Lots of power, rides/drives great and love the 8sp. Terrible fuel mileage but we don't lose sleep over it. However, she wants a Tahoe or Yukon. With the 5.3 and 6.2 troubles we are considering the 3.0 duramax. But honestly, not sure it will be as good as the Ram. Thinking I'll take the Ram as a hand me down.

 

[Jesse Jaymes]

Can anyone pass on their experience with the "Automatic rear locker"?

Work worth a schitt or modified limited slip and does nothing?

 

[Wright406]

2022 with 45k on it AT4. Bout about 5k miles ago. Zero complaints. Love this rig. Here in MT with temps below -25F and plugged in with winter additives have been no issues. Gas mileage will get worse using auto 4WD but that’s expected for most rigs. Averaged about 25mpg from MT to AZ with topper and leveling kit. Best I’ve seen is 27 if I baby it. Good luck, I’d definitely look at the 3.0 if I had to buy another rig.