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Smoke and burning smell under hood LZ0 3.0L Duramax

Does anyone use Hotshot? If so does reduce Regen frequency as their product claims ?
I use it from time to time. It definitely does extend the regen times. I do not notice any better fuel economy when using it though. I used it back to back a couple of times and I skipped a few as it was getting close to 500 miles without a regen. The problem is with the fuel economy we are getting the bottle last forever. LOL, I use the small bottle.
 

I use it from time to time. It definitely does extend the regen times. I do not notice any better fuel economy when using it though. I used it back to back a couple of times and I skipped a few as it was getting close to 500 miles without a regen. The problem is with the fuel economy we are getting the bottle last forever. LOL, I use the small bottle.
Just added my first 8oz treatment when I filled up a few days ago. Hoping this helps. Curious what kind of mileage are you getting ? A lot of my day to day driving is in the suburbs and average about 21.5-23 mpg for tank running around town. On the Hwy running 74 mph or a little lower I average about 23-24 mpg.
 

Just added my first 8oz treatment when I filled up a few days ago. Hoping this helps. Curious what kind of mileage are you getting ? A lot of my day to day driving is in the suburbs and average about 21.5-23 mpg for tank running around town. On the Hwy running 74 mph or a little lower I average about 23-24 mpg.
Mine is only 2 ounces per 25 gallons.
 

Just added my first 8oz treatment when I filled up a few days ago. Hoping this helps. Curious what kind of mileage are you getting ? A lot of my day to day driving is in the suburbs and average about 21.5-23 mpg for tank running around town. On the Hwy running 74 mph or a little lower I average about 23-24 mpg.
When I had the stock Wrangler trail runners I got 28 on 400+ mile drive down to Cotulla. swapped to 18” wheel, still 33” diameter and now it 24, 26 with a tail wind. Above 70 it starts dropping. Lafayette to Pecan island doing the speed limit 30.5. (Speed limit) 55 mph
 

When I had the stock Wrangler trail runners I got 28 on 400+ mile drive down to Cotulla. swapped to 18” wheel, still 33” diameter and now it 24, 26 with a tail wind. Above 70 it starts dropping. Lafayette to Pecan island doing the speed limit 30.5. (Speed limit) 55 mph
That’s impressive mpg, I’m on the stock all terrain 20 inch tire that came with the truck and don't have a desire to get aggressive on tire size or tread again. I had 35x12.5x20 toyo ATIII on my last truck (lifted of course). I don’t miss the 12 -14 mpg with a tail wind and filling up with gas all the time
 

So here is what my truck did this morning. 3104 miles on the truck. Probably the 8th time it’s done this. How can this processes of burning off soot be considered normal causing this type of smoke which comes into the cabin of the truck and chokes everyone riding?
 

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So here is what my truck did this morning. 3104 miles on the truck. Probably the 8th time it’s done this. How can this processes of burning off soot be considered normal causing this type of smoke which comes into the cabin of the truck and chokes everyone riding?
Can't fix it over the internet, take it to the dealer.;)
 

Can't fix it over the internet, take it to the dealer.;)
Fully understood, just trying to see what others maybe experiencing. This is after two trips (one trip each to two different dealers) and both saying there’s no issue with the truck and one “diesel tech” not knowing what a Regen is…
 

At the dealer now. I showed the advisor the videos I took, they seemed to have a better understanding today.

30 mins after arrival they found a turbo leak and on left side of motor pinched wiring that appears to have smoked at some point. 2-3 weeks to get the new lines for the turbo.

I’m no mechanic but I assume the turbo is not working efficiently today and multiple aspects of performance should improve when repaired (MPG, torque, HP)
 

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Update 1/19/22. Local GMC dealer repaired the leak. Here are notes from the work order in case anyone has same issue.

found leak present from turbocharge coolant pipe and hoses.
Installed 24001090 :N-PIPE (03374-CT)
24001
PARTS (GASKET, PIPE, & BOTH HOSES)
Installed 55496956 N-GASKET (03374-CT)
55496
Installed 24001091 :N-HOSE (03374-CT)
24001
Installed 24001103 :N-HOSE (03374-CT)
24001
r&r turbocharger coolant pipe, inlet and outlet hoses. Refilled cooling system and reinspect-OK
 

Mine seems to be doing the same thing. I haven't noticed any performance issues but a decent amount of smoke pouring out the last few times I'm stopped at a light or stop sign.
 

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