nutdriver

I hope this is the solution for me as well. I have been able to have the truck recognize each sensor but after I select Done, the sensors are not reflected in the truck. I do have an iDash plugged in so perhaps this is the issue. Fingers crossed.

While loss of night vision may be caused by Macular Degeneration it is also something that happens normally with age. Similar to Phobby, I frequently am driving on back roads with minimal traffic. My interest is not in blinding oncoming traffic but to simply see further down the road to identify road hazards and wandering animals.

Thanks Dunn! Yes that does kinda suck. On a positive note I presume the OEM LED bulbs have a long life.

I tried some searches but did not find a past topic that seemed to answer my questions. I am curious about what my options are to increase headlight output on a Denali 3500HD truck. In looking at the GMC sales brochure the listed configuration for my truck states "HIGH-INTENSITY LED HEADLAMPS" as my current headlight option. In searching for headlight upgrades that would increase output I found the diodedynamics site that lists this HID bulb upgrade. I talked with their tech and they stated this is not an option for my truck if I have LED bulbs. If not on a Denali, what trucks actually have factory HID bulbs? https://www.diodedynamics.com/replacement-oem-hid-bulbs-for-2016-2021-gmc-sierra-2500-3500-pair.html Has anyone found an alternate LED bulb option that would accomplish a goal of increasing light output?

I normally average about 12-13 mpg towing a 5000 lb travel trailer. My typical highway speed is around 65 mph. I have averaged as much as 15 in the high plains of Wyoming and Montana over 500 miles. Wind makes a huge difference and living in Kansas that is often a factor. Towing into a headwind or even a quarter wind will drop my mileage below 10 mpg. Likewise towing with a tail wind is a big help.

I have not tried to program the matching tpms sensors. For the moment, I have had excellent luck with this system by Truck System Technologies using the cap sensor option. Battery life has been running 2-3 seasons. It has already saved me once by alerting me to a large leak moments before getting on an interstate. This allowed me to stop and replace the tire before any damage was done. Truck System Technologies

I wanted to provide an update to my saga. I have tried a few times to take a look to determine whether I have shutters on my 2021 Denali SRW Denali 3500 Duramax. I have previously only looked in the light of day and the view of radiator fins was prominent. Tonight, I took a closer look using a bright LED flashlight after dark. The view was much better and I was able to confirm that I do indeed have shutters. Really a big shout-out to newdude who provided excellent assistance through his posts and some private emails!

Here is a photo through my front grill. I assume this is consistent with my truck not having shutters despite having the WMI build code??

I just looked at my build sheet. I do have WMI listed as reflected in the screen snip below labeled as "SALES PACKAGE - CONV PACKAGE." I do not have shutters.

What is the code or designation for shutters on a build sheet? I have a build sheet for my 2021 Denali 3500 SRW Duramax and do not see anything that mentions shutters.

I totally agree about retention of engine heat. I think it is normal to not have shutters with plow prep. It seems less typical that mine would not have shutters since I do not have plow prep and my truck is a SRW Denali.

I realize that this is an old topic but I wanted to see if we have learned anything new. I have a HD 2021 3500 SRW Denali truck without any plow prep and it does not have shutters. I am wondering if the use of shutters changed somewhat for the 2021 model year. I am more curious than anything since shutters are another possible failure point that could cause trouble. I am going to be spending some time in Colorado at higher elevations this winter so Most likely I will be putting on the winter front cover to help the engine warm up easier. For those with Shutters does your build sheet reflect Active Shutters as a specific option?

Unable to see your photos.

Not that it really matters but I jumped to conclusions because this is posted in the 6.6 Liter 2020 Duramax forum section.

No worries. My experience driving a VW TDI for 20 years showed swings of about 10% between winter and summer. I mitigate the winter hit somewhat by driving my duramax more gingerly until it is fairly warm. I have about 2 miles of 35 mph followed by 3 miles of 60 mph before hitting a local expressway.

I understand the graph but am having some trouble believing this is in a Duramax. What engine is this? It looks like your average is somewhere in the vicinity of 27 mpg with peak average even more.

Thanks for the additional information!

Curious where this 80 amp fuse is located. I would be somewhat concerned that 80 amps is more than would ever be needed and could pose a fire risk. Can this fuse location be used but with a lower rated fuse?

It would seem that the weight would of the bedliner would be included in the curb weight assuming this was installed by GMC. Also, there is going to be some variance in any weight measurement. In this case a variance of 50 lbs is less than 1%. Also, floor mats may not be part of the factory curb weight. If you added those your variance would also be less.

I have subscribed to OnStar but at the promotional rate. There's no way I would pay full price. I haven't made any decision yet on OnStar

I think this may be a bit of semantics as to what is included in Basic. Essentially it is the diagnostic alerts and dealer maintenance alerts. My 3500 was new at the end of May 2021. Also, if you provide a credit card number, OnStar will give 3 months of connectivity for free. If you do not want to continue you need to cancel before the first renewal at 90 days and there will be no billing. I did not carry any added OnStar services on my 2018 2500 after the 90 day trial. I am still pondering this for my 3500 and I am in the 90 day window.

Per GM Authority: Basic: free for five years with the purchase of any new OnStar-equipped GM vehicle, the plan provides key fob services from the myChevrolet, myBuick, myGMC or myCadillac apps, while also including OnStar Vehicle Diagnostics and Dealer Maintenance Notification The basic is free for 5 years. Anything beyond the basic not including the free initial trials is extra.

Similar to what "unit" shared, I transfer quarts from my 10 quart jug to a 1 gallon oil jug. The jug is smaller and easier to handle. I use a funnel as suggested by RugbyRef but a somewhat smaller version. The funnel is working well. I think I picked up this funnel at Walmart. Neat idea by iflypigs!

I think torque values would be helpful.

I took off the rear Rancho Shocks on my 3500 trucks after the first 500 miles and replaced those with Bilstein 4600 shocks I had from a prior truck. I definitely noticed an improved ride especially over washboard roads and and had a more planted feel. Sold the Rancho takeoffs on Craig's List. Plan to do the fronts as well. The ride improvement on my 3500 with the Bilsteins on the rear only was less noticeable than on my 2018 2500. I think that is probably due to the higher spring rates on the 3500. Not everyone agrees but in my research, I found that the 4600 shocks generally have a lower valving for compression and rebound over the 5100. Bilstein 4600 and 5100 Comparison I recognize that this is just one source but in my prior research I found other similar resources.