Hey guys,
I have a few questions because this is my first duramax. I've had several fords and dodges but still figuring out the duramax.
So I bought my truck last month. After about two weeks I brought it back to the dealer to have steps installed. On the way down the display notified me that the def was low. I had the dealer top it off while it was there. They told me that it comes with only 3g. They added 4g. This was at 1000m.
Then about three weeks later I get a CEL. When I checked in w Onstar they told me it was a code for inj 1 out of learning range. The def message showed up again on the way to the dealer.
The dealer replaced the inj and added almost 5g of def. this is all within 3300m.
I'm concerned that the inj was bad at 3k but whatever.
The thing that is really bothering me is the def usage. So far I've counted about 5-6 regens since I've had the truck. The first time it regen'd I couldn't figure out what was up w it because it was idling at 850-900.
I drive in LA traffic and usually do about 100-150m a day. The reports I read and what the dealer told me was that you shouldn't need to touch the def between oil changes.
This is now about 14-16g in half an oil change. I could understand using more if I'm towing, but I haven't even towed w it yet and honestly I've been driving it like an old lady. It hasn't shifted higher than 2200 yet.
I thought that maybe the regen's and def usage was from the bad inj but it just regen'd again today and it took about 45min to complete. This is 300m after the inj was replaced.
The last thing I am questioning is fuel mileage. It seems to regen about every 500m so it's killing my mileage. The first tank I averaged about 16. Then it stayed around 15.5. The last tank was 14.5. This is all hand calculated. My 99 dodge w twins sticks and fuel would average 14-15 and it had 225k on it.
Does anybody have any ideas? I really love the truck and just want to make sure everything is cool.
I have a few questions because this is my first duramax. I've had several fords and dodges but still figuring out the duramax.
So I bought my truck last month. After about two weeks I brought it back to the dealer to have steps installed. On the way down the display notified me that the def was low. I had the dealer top it off while it was there. They told me that it comes with only 3g. They added 4g. This was at 1000m.
Then about three weeks later I get a CEL. When I checked in w Onstar they told me it was a code for inj 1 out of learning range. The def message showed up again on the way to the dealer.
The dealer replaced the inj and added almost 5g of def. this is all within 3300m.
I'm concerned that the inj was bad at 3k but whatever.
The thing that is really bothering me is the def usage. So far I've counted about 5-6 regens since I've had the truck. The first time it regen'd I couldn't figure out what was up w it because it was idling at 850-900.
I drive in LA traffic and usually do about 100-150m a day. The reports I read and what the dealer told me was that you shouldn't need to touch the def between oil changes.
This is now about 14-16g in half an oil change. I could understand using more if I'm towing, but I haven't even towed w it yet and honestly I've been driving it like an old lady. It hasn't shifted higher than 2200 yet.
I thought that maybe the regen's and def usage was from the bad inj but it just regen'd again today and it took about 45min to complete. This is 300m after the inj was replaced.
The last thing I am questioning is fuel mileage. It seems to regen about every 500m so it's killing my mileage. The first tank I averaged about 16. Then it stayed around 15.5. The last tank was 14.5. This is all hand calculated. My 99 dodge w twins sticks and fuel would average 14-15 and it had 225k on it.
Does anybody have any ideas? I really love the truck and just want to make sure everything is cool.