This story begins last October. Multiple weird things happening when driving. Doors lock/unlock, all gauges drop to zero and pop back up, irroneous codes setting from all over. Started checking and found the CAN was down. Resistance across CAN would fluctuate from 87 ohms to normal 60. Removed, cleaned and greased all module connectors, removed, cleaned and greased all ground points, checked batteries, checked both alternators. Ended up having to replace EBCM AND BCM. Used SPS2 and programmed both, life was good.

Now after running perfect since then, I leave home the other day. Door locks start acting up again and the speedo needle bounces. No other gauges are affected. Get home, hook up the breakout box and my network is solid. Only module that shows loss of comm is EBCM. Really don't think it is bad, was a Delco replacement. Cleared codes, drove it and was good until I hit a pothole with right front. Noticed that maybe that hub is getting a little noisy. Has anyone else had issues like this? Could a hub short out in a way to interfere with the CAN?

Hi all, I see they make a diesel cap (fuel cap). Is it worth purchasing?

Stock 2016 crew cab long bed. 100,000 miles. My city has a concrete elevated freeway, and the expansion joints are almost harmonic how they start to bounce the rear of the truck. I replaced the oe shocks with Bilsteins at 75,000 miles, and they helped, but I would like one thing better.

Hi all! I have a 2024 gmc Sierra 1500 and CarPlay has been a bit weird lately. I use Waze and play music on Spotify and I notice that the songs cut out for maybe a second or two and then keeps playing. This happens quite a bit now. I’ve tried plugging my phone in instead of utilizing wireless but it keeps doing it. I did a reset for infotainment and my phone. I checked for all updates. I tried utilizing YouTube and it does it there too….. I’m not sure what it could be. CarPlay itself seems to keep connection. It’s just the music or audio being played. Any ideas? This is still happening and it is bothersome.

Picked up back in October with 77k on the clock

One owner truck.. switched from being a long time Chevy express driver ( I kinda miss my van lol )

Newbie here, sorta. Pictured is the steering stabilizer, among other things, covered in fluid, appears to be oil. Could be power steering fluid? I’m not sure what the source is but it’s stressing me out, folks! You can’t see it from here but the road vent tube is up there too, and at a random stop light at idle, I can see some smoke or steam (odorless it seems). Could it be all connected somehow? Any insight from would be very helpful. What am I looking at? Anyone watching the NCAA Hockey game?

Hey all! I’m finally getting around to cleaning the EGR system on 06 duramax. I have the parts pulled and everything but what’s the best way to actually clean them? Brake clean? Carb cleaner? What’s worked for y’all??

Also, can anyone tell me if I need to take the computer looking part off of here to clean this? I can’t seem to get a picture on here but it’s the largest part of the EGR system, long tubes with a small computer of some kind in the middle.

Is this different than most? I dont have a ton of experience, but I've helped a friend replace turbo on his LB7 awhile back. His was different when taking horn off. If I remember right, it was three 10mm bolts, with a little bit of space around them. Mine is torx with zero space between torx and pipe, so I can't get a ratchet head in there for the right angle. I should be more worried about the bottom, but that one was not bad. Can't figure out how to get this top right one out. Also, why torx and not 10mm bolts on this? Thanks!!!

Chevrolet technician here. Curious to hear from those that own trucks with the 3.0, how reliable has it been for you?

Hi! First time having a diesel. Checked the oil at 1950 miles on a 2024 3.0L. Oil is black. I am used to having gas motors and seeing cleaner oil. Should I be concerned or is this normal for diesels?

I have a 2003 lb7 and I got the shift range inhibited on my dash, cleaned the harness since fluid was leaking into it and shorting connections and that didn’t fix anything. I’m 28k in (no I’m not joking)on a truck I can’t drive. Please help

Hi everyone, longtime lurker, first time poster.

I’m looking at buying an 02 LB7 next week with 300k miles, this would be my first diesel (I’ve wanted one for years and am finally in a spot to do so) I’ve already scheduled an inspection at a Chevy service center in my area but I was wondering what other input/advice y’all may have for me? ECSB; the bedside on the passenger side looks a little rough and the interior will definitely be needing some attention.

So I recently got this truck and every time I drive it after it sitting for a couple hours the engine shutters and it blows soot out the exhaust. I believe the variable vanes have been getting stuck but I am not completely sure if that is it or what I can do to fix it.

I have a 2006 LBZ Duramax. It has a stroked cp3, airdog 165, and custom tuning. it normally rolled a decent amount of coal and the turbo would light up almost instantly it felt like. About 2 days ago it was running like normal. I parked it for about an hour then it just wouldn’t roll hardly any coal. As well as the turbo feels like it is taking longer to light up. It still has good power when it does light up just feels like its hesitating almost. My fuel filters have only a few thousand miles. My fuel rail pressure is also good still. I don’t know what to look for really.

Don't know if this common, but I'm having to replace the DPF in a LMM and I noticed the nuts holding the front flange have a spot weld on them to keep them from backing out. Is that normal? Seems excessive.

I gave serious thought to deleting it as I live in an area that doesn't require emissions testing. However, I go on long trips pulling a trailer to race motorcycles and don't want to be stuck 8hrs away from home needing a repair and be turned away because of a deleted diesel. Super pissed that some of the parts to this are so hard to find if they're cracking down on deleted diesels that bad. GM should have all of this shit available all the time. The pressure lines for the DPF are discontinued. Easy enough to cobble something together, but annoying I can't get an OEM replacement.

Currently have a 18 L5P that has 108,200 miles currently. Been looking at videos on the newer 10 speed and they internally change the filter and but a new seal gasket. Is it best to do the same here having a 6 Speed or just changing the spin on transmission filter? What are your thought and opinions?

2011 LML just purchased it. Right at 100k.

Yay nay? Seems to have better filtration at 2 Microns and cheaper long term. 40ish for OEM and I get Cat filters for like 18$ (heavy equipment repair shop).

Standard filter is good for 12-1600 gallons. Cat says replace these every 500hr of run time on a machine which they average 3-7 GPH so that would be 3500 gallons on the high side.

I don’t see a downside besides one more o-ring (which I’ll go ahead and order the replacement too.)

Also anyone that has done it any input on brand? Looking at Sinister.

As the title suggests, what are thoughts on a 2018 L5P with 200k miles on it already? Good buy or stay away?

Alright so I keep coming across this. I have a 2024 gmc Sierra baby duramax and I really don’t think I have the balls to do this but I keep hearing and watching that people put cheap ATF in their fuel as an additive. People claim it works magic compared to shelf additives like hotshots….what are people’s thoughts? I have a 5 year warranty bumper to bumper. Do I dare do such a thing?

Have a customer with a 2020 L5P that's going into reduced power intermittently. Only code is P0216 for injection timing and a couple communication codes. Very little information on this for newer trucks that I can find. Has anyone encountered this

trying to hood stack my 2009 LMM, but cant find a hood stack kit anywhere. anybody know why? can i use a lbz hood stack kit?

Hi all! I have baby duramax (1850 miles). When are we expected to have a regen? And how do we know it is happening or has happened?

how do i tell if i have a LMM or LML? it’s a 08 sierra 3500

I bought a truck with a flat bed that needs work, and it came with the regular bed too which will also need work. About the same amount either way. So which would you choose? I’m a construction project manager, and will likely need to haul water and wood. I only need a few tools regularly but I don’t have a trailer (yet, but may get a relatively large camper) both have goosenecks already as well.

Any help is appreciated! Dealers won’t give out part numbers as per usual, and I’m 100 miles from the closest dealer anyway

2011 LML. It had weight loss surgery when it was new by the original owner at a well-known local shop. Fast forward to last year, GM replaced the TCU when chasing gremlins. Now I no longer have a tuned transmission, and it sucks. Lazy shifts, the converter seems like it never locks. The shop that originally did the delete isn't touching tuning anymore (thanks, EPA).... what are my options?

Has any one had problems with this block off plate