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Starting to make sense. Mine does have plow prep and no shutters. Good detective work!

That's a conundrum for sure. I can't imagine why engineers would put shutters in front of that giant charge air cooler and radiator. As I stated above, my 2020 LTZ 2500HD does not have shutters. I can see where the shutters would fit into the front grill work for gasoline powered trucks but I didn't think any diesels had them. It will be interesting to find out what the thinking is on them.

Diesels don't have the shutters, gasoline engines only.

First time out with my new 2500HD towing my travel trailer. I was parked at Mohican State Park in Ohio and a storm blew in sending a tree into my camper. My wife and I were in the front portion of the trailer when the tree hit but neither of us was injured. Quite a ride!

I read this post and decided to grease my new LTZ just to make sure everything was lubed. I was pleased that this truck is easier to grease than either of my two prior HD's. two less zerks and the remainder are more accessible. That said, it was obvious that all points had grease from the factory and there weren't any issues. My thoughts are that the one thing any HD owner should do himself or herself is to buy a grease gun and grease the fittings yourself. It's not hard, it can be done with the truck sitting on the ground and takes about 30 minutes. The front skid plate under the radiator needs to be removed to get to three of the fittings. Four 15mm bolts hold it and it comes down out of the way. I doubt many, if any dealers or oil change shops ever grease all of the fittings because it's too time consuming and bothersome for them. Just my two cents worth!

It would be helpful to know more details: travel trailer, fifth wheel, how long, how much does it weigh, where and how far exactly are you towing. How fast do you tow? Mountainous terrain or mostly flat makes a difference. I haven't towed with mine yet but I'm going out next week for the first time with a travel trailer. I'm not using much DEF in normal driving but I'm sure the truck will use more with a load behind the truck. We'll see!

I have not experienced any squeaks or clunks in my 2500HD nor have I used Fluid Film on the truck. If you think the Fluid Film is the cause of the squeaks, take the truck to a magic wand type car wash and clean the springs and bushings using soap with high pressure spray. Dirt and Fluid Film residue should wash off. Oily substances like Fluid Film are dirt magnets. You may have salt and road grit build-up where it's not intended and it could be creating your problem.

These trucks are heavy, the heaviest pickups yet built by GM, and while the 6.6 gas is a good engine it's not going to put them into sport truck territory. Adding heavy, oversized wheels and tires will only make them more sluggish and hurt fuel mileage. Anyone who tell you differently is not being honest.

The new Allison 10 speed trans, 10L1000, used in the new 2500HD's calls for a different fluid than is used in the older six speed trans, Allison 1000. So I think I'd stick with what is recommended by GM for each. I doubt you could tell the difference at any rate. I used Transynd fluid made specifically for Allison transmissions in my 08 Silverado with the Allison 1000 when changing fluid and filter but I couldn't tell any difference in the way the trans shifted or felt. Transynd is considered to be a superior fluid and I used if for longevity of the transmission but any quality fluid might have been just as good. It would take a scientifically accurate test with many fluids and transmissions to know for sure and I don't think anyone has ever done that. Many transmission builders recommend changing fluid often over using the most expensive fluids. They simply suggest using any quality fluid and change more often. I tend to buy into that philosophy.

I have an LTZ Crew Cab and I have not noticed any suspension problems and have not seen any other post with similar problems. I would suspect the shock absorbers before the springs. The springs look normal to me and it would take one monumental jolt to bend one if these. I believe the LTZ's have a better shock as standard equipment than the WT's. Also, none of the 2500HD's come with a rear sway bar, so you're not missing anything in that department. I think I'd look into new shocks before I'd do anything else. A premium monotube shock, such at Bilstein's would be my choice. Good shocks will definitely firm up the ride and provide better control.

Batteries are not changeable. Old units with dead batteries have to be replaced with new ones.

I can dig that - it looks good. GM wanted a distinctive look for the HD's so that they would not be mistaken for 1500's but the one, pictured above, is a looker.

I don't think any of the body parts from a 1500 will fit a 2500HD In any case. GM says the only sheet metal shared with the 1500's is the top of the cab, so it's unlikely anything would bolt up going either way. It's said that beauty is in the eye of the beholder and that's a good thing. I like the Silverado 2500HD much more than the GMC, which in my view screams bling and rice. The GMC wheel wells are odd shaped and the orange marker lights in the middle are atrocious. The front is chrome way beyond what I consider to be in good taste - GM needs to tone them down a little. If you like them OK but I'm not a fan.

Just curious. Why would you wand a 2500HD to look like a 1500?

The plow prep package gives you quite a lot for small additional cost. It must be a popular package because many of the trucks I see on dealer lots have it. I have it and can't judge how much stiffer the front suspension is but it's no worse than my 08 was without the plow package. I drove a lot of trucks before buying this one. The Ford and Ram HD's I drove were less comfortable that the Chevy. I like having the larger alternator, skid plates and pass through hole into the cab from the engine bay. In the end - it depends on what you're going to do with the truck. Snow Plow Prep Package: includes (KW5) 220-amp alternator, includes increased front GAWR on Heavy Duty models, (NZZ) skid plates (transfer case and oil pan), pass through dash grommet hole and roof emergency light provisions. Contact GM Upfitter Integration at www.gmupfitter.com for plow installation details and assistance (Requires 4WD model. Requires (CGN) Chevytec spray-on bedliner unless (ZW9) pickup bed delete is ordered. Upgradeable to (KHF) Dual alternators (220-amp primary, 170-amp auxiliary). Not available with (F60) Heavy Duty Front Spring Package.) Snow Plow Prep Package Power feed to accommodate a backup and roof emergency light1 A single 220-amp alternator Heavy-duty front springs Under body skid plates to help protect the transfer case from debris May require additional optional equipment

Use painters tape to mask off any areas that you don't want to come into contact with wax. It only takes a few moments and it will make the job easier in the long run.

This thread is a little dated but from what I've read GM stopped supplying the sensors in the 2020 models. The 19's did come with them in the truck. My new 2500HD did not come with the sensors but they can be had for about $130.00 per pair on-line.

I have just under 600 miles on mine, purchased March 2nd., and haven't towed yet. I'm averaging 17+ mpg in local driving and that's almost two mpg better than my 08. I think that's pretty good for a truck with so few miles and one that weighs about a thousand pounds more. Looking forward to towing, hopefully later in the summer.

Yes, that does help and thank you! I pulled the dash end off earlier today and it looks fairly simple to pass into the fuse location. The camera should arrive on Monday - we'll see how it goes.

I'm going to install a dash cam on the front windshield in the next few days and I'll be running a power wire down the passenger side A pillar to the passenger side fuse box. I'm not sure how much trouble it will be to access the fuse box from under the dash. The run from the bottom of the A pillar to the fuses isn't far, so it shouldn't be too difficult. Just wondering if someone else has done this and might have some insight as to the best way to get into the fuse box from the bottom of the A pillar. Also, any advice on what switched fuse location would be best for a camera.

Pickup this truck up on Monday. It replaces a 2008 that I enjoyed for a long time.