r/Duramax

If so how’s it going?!

03 lb7 Duramax, motor has been rebuilt around 14-15 years ago so it has about 150-170k on it. It’s sat for about 9 months at the moment, any reason or signs it won’t start? It mainly sat through the winter and now this spring and summer. Does the same cranking as it did in this video as of now.

Figured I’d throw this in here so it helps anyone else. Had a ton of help from the Reddit community on this.

2026 SIERRA 2500 Denali Ultimate
-Cognito Torsion Keys
-Fox 2.0 PSSRs
-Kryptonite UCA’s
-Rough Country mudflap delete kit on Amazon
-Nitto Ridge Grapplers 37x11.50r20

Note; we installed the Cognito PISK kit but it caused binding in the steering and so we uninstalled it and went right back to factory feeling.

Note; we didn’t need to cut off the bump stop in the front either, there’s plenty of room with Kryptonites UCA’s that cutting it isn’t needed.

Using the factory wheels with that Tire there’s absolutely zero rubbing whatsoever on the frame or the sway bar. No trimming of the front valence either. All that had to happen was hammer in the front felt just a little bit, looked like two good whacks and it was done.

So if anyone else is trying to run this combo just know you can run 37x11.50s with zero rubbing whatsoever. The truck rides incredible now, super plush with the fox shocks. Tires I’m running em at 60PSI. Couldn’t be happier.

2005 GMC Sierra 2500HD 4x4 SLE
Bought this truck from a older lady who’s husband passed away it is a 1 owner they bought it new off the lot with 655 miles it now has 180k miles I bought it not running and replaced the FICM with a brand new one from city diesel and everything works great just swapped all the fluids and it’s great no dash lights very clean interior with Bose outside it does has some dents and a bad scrap on the driver door as seen just curious it’s worth it’s a zero rust Texas truck thanks! Also absolutely zero blow by

Hello. I have a 2022 Chevy Silverado 3500. Every single time I put it in park and shut the truck off I get this icon telling I need to shift to park. Any know. Issues / fixes would be greatly appreciated!

2023 High Country 6.6

Just got my 2017 L5P wondering what wheel sizes I can run on stock height. It already sits perfect for the height I want it at. But would love to put some 22x12-14or if I can 24x12. If not what leveling kit or lift you guys recommend. I’ve been eyeing the kryptonite kits. But don’t want go any higher then it already is.

Alright, I need some assistance. 🙄.

2018 2500 w/t. Picked up with a smoking issue and fuel issue. Supposedly had a turbo swapped from another L5P. And was T&D prior to my purchase and "is a 60hp tow tune".

I have chased down a low rail pressure issue for two weeks now. I'm getting heavy smoke on acceleration, vein position shows 73% at idle and doesn't fluctuate more than 10-15% when driving.

Sometimes rail pressure will stay with desired for a little bit but drops down substantially at random and stays low. Picture of my parts list so far. Had a highly recommended local diesel tech here in Murfreesboro TN come by and diag to which he said all pointed to MAP sensor but that changed nothing. He also did a vein relearn and crank position relearn he said. I'm not losing coolant, and CCV reroute will be here this week. Any help appreciated, I need to tow with this truck next weekend.

This is my first time pulling around 15,000 lbs. this truck pulled it like a champ. This is my first diesel truck, I’m glad I made the decision to go with a Duramax.

Looking at buying this 2013 3500 chevy, there asking 17k with it having 198k miles, has the def deleted but needs a tune to get it out of limp mode which I'm trying to see if the dealership will do. But is the lml a good motor aside from the cp4 pumps. What's yalls opinion on the lml and this deal?

Ive posted this truck here before, but 39k mile LBZ, Im wondering if I can get away with a full EGR delete without a tuner, I can fabricate every part I need myself including a DIY High flow kit from scratch, my issue is Tuners/Tunes are expensive and I dont want to tune it Until I do compounds and even then I dont want a high horse tune. But im really not trying to pay for tunes twice But im also not trying to use it with Intact EGR much longer for obvious reasons. What would you folk do?