Currently looking for a main engine harness for a 2003 lb7 with cali emissions. Anyone know where to locate a oem one or aftermarket

2020 GMC Sierra 2500 HD

Long story short, I had to high-center some road debris on the highway, but it still hit something underneath at the rear of my truck. I heard an awful noise from under the truck, so I pulled over to check it.

Apparently the driveshaft has a vibrational dampener attached right near the rear diff housing. The dampener has a large metal ring that is has a rubber gasket wedged between it and the yolk glued in with Elmers school glue and the slightest ding will knock that ring off and shred the rubber gasket. Neat.

I managed to secure the ring to the diff housing using a bungee cord to keep it from jangling around under there until I got home, at which point I took a grinder wheel to it.

This is just an FYI to anyone else who runs into this, lots of people have had this part fail. Some replace it, some do not see a point. Replacement appears to be an easy fix, though.

I have a 2024 Silverado 3.0L Duramax LZ0.

I know Gretio + OBDLink MX+ supports stationary/service DPF regeneration with the hood open, but can it also trigger a normal mobile regen while driving?

Ideally, I’d monitor DPF soot levels using a scanner app, and if they’re getting high while I’m already on the highway, I’d like to manually initiate a regen instead of waiting for the truck to do it automatically.
Has anyone successfully done this on an LZ0 using Gretio’s “Force Standard Regeneration” feature?

Was driving my lb7 and I got a check engine light for overboost and now I have blow by when I go to work Monday I’m gonna compression test it and use a bore scope to see the damage

Just want to put it out there, I had a wicked wheel and it was great it really woke my truck up. Then I thought well more is better so I paid $2400 for a bigger 64mm turbo, now it is faster a little bit it's not $2400 and 12 hours labor faster. Stick with the wicked wheel.

2004 LB7, tuner, 60+ injectors, Duramax tuner 6speed valve body and TCM.

Terrible customer service! Paid for a vehicle tune that never worked and showed “FAILED.” No refund, no phone support, and everything is handled through emails they barely respond to. Other shops can resolve these issues with a quick phone call. This company takes your money, doesn’t fix the problem, and leaves you hanging. Would not recommend!

I pulled off y bridge to get to the turbo, installed intercooler piping and intake piping then throw everything back together. I go to start the truck and I have all these codes, everything is connected and plugged in.

Hello All, I'm doing almost a full front replacement on my LBZ. The parts I currently have...

-Upper Control Arms/ball joints

-Sway Bar Links

-Inner and Outer Tie Rod Ends

-Lower Ball Joints

All products listed above are Mevotech TTX series. I'm looking for Lower Control Arms and can't seem to find the TTX version, what is everyone else running? Budget < $400 for the Control Arms. Thanks in advance.

I replaced the wiper transmission, arms and blades. Now it makes this sound. Wondering if the arms are to "strong" holding blades down. Any ideas?

Thanks in advance.

We’ve had this truck for roughly 4 years now and can’t figure out how to not have coolant issues. It was giving us the classic “coolant level low” alert constantly and it also smelled like coolant. Took it in to our local shop and that got addressed. Now after having 0 trouble with it for months we hopped in it this morning to head out and sitting at a stop light had plumes of smoke coming out from under the hood on the drivers side. We pulled over and it’s leaking coolant under the hood somewhere, temp is fine, reservoir still had coolant in it. It’s dripping down onto the frame and running all over the place. Any thoughts?

Does anyone know why they are discontinuing the metal housing fuel filters for these trucks? I just replaced mine and I’m ordering a spare to have on hand. And I’m finding that a lot of the usual metal ones are being replaced with plastic housings. I’m still able to get the metal racor ones but was curious if anyone knew for sure why. I assume it’s a world economics issue. I’m not fan of the plastic ones because the first one I used, it cracked during installation. So I just prefer to stay away from them if I can.

Context: I have an ‘07 LBZ medium duty truck.

124,500k miles
6.6 Duramax LB7
I can ship anywhere + freight.

Back in July 2022 I ordered a new 2023 model year 3500 HD crew cab, long box, single rear wheel truck. It was to have gray leather interior, LTZ trim with a 40/20/40 configuration and of course four wheel drive.

After arguing with my wife that it was time to trade in my 2019 LTZ dually, the order was submitted. Then we waited.

And waited. And finally in February of 2023 GM cancelled the order and that amazing green color too. Out of annoyance I kept my 2019 until it ate another injector last week and I ended up trading it for a new 2026 HC dually. The 2023 was never to be, but I kept the renderings of a truck that should have been.

Hey guys, first post here. Today I was driving my 2008 LMM home from work. I was cruising at about 70 miles an hour when all of a sudden my ABS light came on, the dash started flashing service four-wheel-drive, my edge monitor completely blacked out, and my transmission started slipping and jerking. When I got pulled over, I read the codes and they were for coolant temperature below thermostat regulator, glow plug number six code, a code about the turbo vane position sensor, and the cruise control input circuit malfunction code. I took it over to my buddies house afterwards, and we noticed that I had some slight smoke coming from my transmission dipstick (included in the video), and what seems to be a very tiny leak coming from one of my transmission cooler lines. However, I just had all my fluids changed and they’re all at the normal levels and the right colors. Does anybody know what could be causing this? Thanks!

EGR blocker plate on the stock up-pipe. Everybody said the beveled part was weak and would blow. Did not expect the top to fall off.

Thinking about replacing my OEM coolant tank with this WCfab. Says they run a float style system that is serviceable and takes care of the known problems of the OEM sensors that you have to replace the whole tank. I’m on my 3rd tank in my 19’ L5P and I’m starting to get false coolant level low warnings now again.

Replaced MAP sensor but truck is still saying service emissions system. Counting down miles to speed limitations. Truck is completely deleted and tuned. Replaced MAP and flashed ECM. Check engine light still coming on with service emissions notification. Any ideas?

I have a 2020 GMC 3500 Duramax with a coolant leak. So here’s the problem it has no visible leaks anywhere. It also doesn’t over heat. The only noticeable problem is when your just idling the a/c is warm. Any ideas on what this could be. It’s on a diet also.

Saw this error P2297. I cleared it. Do I need replace the O2 sensor ? 2023 chevy 3.0L

Dealer has a 2024 1500 duramax listed for $42,000. Truck has 72k miles on it just wondering what everybody’s opinions are!