dmax 3.0 and the cold (-30F)

steiny93

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Wife's dmax 3.0 has 7k miles on it, first time out in cold temps, 500 mile trip in -20F to -30F (ambient not Windchill).

Are others seeing these issues?
- The center console is cold, like really really cold (water freezes and a phone on the wireless charging plate will stop charging and throw a temp alarm). The coldest spots being right under the phone and under the cup holders.
- At idle with a slight breeze coming from the rear of the vehicle during a regen it absolutely stinks in the cab, to the level of getting headaches. During a regen it the exhaust stinks, totally get that, but this winter the smell is really bad in the cab. If you drive or turn into the wind the smell goes a way.

Called dealer, they haven't had complaints on either of these items but they are going to look at it. Anyone else experiencing these during cold temps? We didn't notice either of these during the summer / fall.
 

ESH427

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I was recently in -20 ambient and didn't notice any abnormal console temps.

Regarding the regen smell, I did notice it very strong when it was quite new (<500 miles) but not since. What was strange for me is it seemed like our DEF consumptions was very high (like 5 gallons in 2500 miles - not towing)
 

steiny93

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update
Wife took the truck to the local dealer; the following is what they told her:
- Exhaust smell: GM has a bulletin out, the back pressure valve failed its test. New part ordered, no eta on its arrival
- Cold console: Dealer doesn't know how to fix it, opened a case with GM, no response from GM nor do they have an eta as to when a response will happen


It's -30F today, we have another 500 mile trip tonight and tomorrow, the Denali XL is staying put until these issues are resolved. If anyone else has gone through either of these please post a response. Per the dealer I purchased this from it was the only denali diesel suv they were able to get in, so no others to compare against (lots of pickups, they operate as intended).
 

MO VietVet

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I would think there would be a way to attach insulation under the tunnel to stem the cold.
 

Ken Rolls

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Wife's dmax 3.0 has 7k miles on it, first time out in cold temps, 500 mile trip in -20F to -30F (ambient not Windchill).

Are others seeing these issues?
- The center console is cold, like really really cold (water freezes and a phone on the wireless charging plate will stop charging and throw a temp alarm). The coldest spots being right under the phone and under the cup holders.
- At idle with a slight breeze coming from the rear of the vehicle during a regen it absolutely stinks in the cab, to the level of getting headaches. During a regen it the exhaust stinks, totally get that, but this winter the smell is really bad in the cab. If you drive or turn into the wind the smell goes a way.

Called dealer, they haven't had complaints on either of these items but they are going to look at it. Anyone else experiencing these during cold temps? We didn't notice either of these during the summer / fall.
Precisely why IMHO new vehicles are more trouble than they're worth.. I'll keep my 02 burb til the wheels fall off.
 

MO VietVet

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I love my 05 Z71 for the same reason. Way more simple and has what I need. If I want pizazz, I get a new TV and other toys for when I am having a drink and watching a show.
 

steiny93

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Update...
The exhaust regen issue is due to a bad 'pressure valve' within the exhaust system, part has been ordered (FYI, for other diesel owners GM has an open bulletin for this)
The center console issue per GM is a problem with the 'auto' hvac capability, not diesel specific, more so a denali issue.
 

NYisles1

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Update...
The exhaust regen issue is due to a bad 'pressure valve' within the exhaust system, part has been ordered (FYI, for other diesel owners GM has an open bulletin for this)
The center console issue per GM is a problem with the 'auto' hvac capability, not diesel specific, more so a denali issue.
Did they have any fix on the center console issue? I just noticed for first time today when I picked up my cell phone from the wireless charging pad it was freezing --- and this after being in the car for about an hour. The pad was ice cold as well -- and its in the 20s here today, nothing extreme. Wondering how HVAC is responsible for that -- it must be cold air coming from underneath.
 

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