2020 GMC 2500 Denali - Page 2 - Chevy and GMC Duramax Diesel Forum
2020+ (Non Powertrain) Discussion of 2020+ topics not related to powertrain

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post #11 of 51 (permalink) Old 08-11-2019, 10:43 AM Thread Starter
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Quote:
Originally Posted by hobbes442 View Post
what is the Offset for 20" wheels ?
plan on just taking stock tires at first - like looks of Sota Scar and XD Grenade
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Originally Posted by Busa Dave View Post
Great Looking Truck! My first post here but am picking up my 2020 Denali White Frost tomorrow. FINALLY can go back to a Duramax!! GM moved the DEF Tank!!!! Going to put on tougher tires for the ranch in SE NM between Pecos and Carlsbad and a couple of sizes bigger and found out from GMC the axle for the AT4 is the same as the Denali and I like the White Frost which is NA on the AT4.

With this new 2020 model will be seeing a lot more out there. DEF tank punctures scared off a lot of people me included. My 18 6.7 Platty Ford has been a nightmare for just 35k miles. Cannot wait!!
Welcome to DF. Congrats on the truck. Be sure to post up some pics of it.Pretty sure it is a 20 but I have had these for 5 yrs now so I will have to look deeper. Mine will mostly be on the road so I am not too concerned about the DEF tank.
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post #12 of 51 (permalink) Old 08-11-2019, 11:34 AM
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What issues did you have with your Ford?
Module that controls the radio, Nav etc -- APIM failed once and is acting up again well known issue across entire Ford line.
Water Pump Failed
#3 Injector failed 2 weeks ago
Problem with Injectors? again makes truck shake like a dog passing peach pits is off and on lower power. Will not throw a code. Dealer is stumped. I drive a lot on the highway in remote areas our ranch is 28 miles from town (Carlsbad) cannot have a unreliable truck..
One big rattle inside the frame that they cannot fix--that is non mechanical though
Front axle yoke seal leaked

Not pretty but hell it is only money right?
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post #13 of 51 (permalink) Old 08-11-2019, 08:49 PM
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Quote:
Originally Posted by Busa Dave View Post
Module that controls the radio, Nav etc -- APIM failed once and is acting up again well known issue across entire Ford line.
Water Pump Failed
#3 Injector failed 2 weeks ago
Problem with Injectors? again makes truck shake like a dog passing peach pits is off and on lower power. Will not throw a code. Dealer is stumped. I drive a lot on the highway in remote areas our ranch is 28 miles from town (Carlsbad) cannot have a unreliable truck..
One big rattle inside the frame that they cannot fix--that is non mechanical though
Front axle yoke seal leaked

Not pretty but hell it is only money right?
Sorry to hear that. That sucks. What year and how many miles are on it?

Are you referring to Carlsbad NM?

2017 Silverado 3500 LTZ (Summit White) | CC SB SRW | Z71 | Duramax L5P | Undercover Ultra Flex bed cover | Draw-Tite front receiver | AIMS 3kw inverter-charger | Titan Travel Trekker 50-gallon auxiliary fuel tank
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post #14 of 51 (permalink) Old 08-12-2019, 08:52 AM
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Sorry to hear that. That sucks. What year and how many miles are on it?

Are you referring to Carlsbad NM?
Yes NM SE of Carlsbad. Ranch starts across river about 400 yards north of the Texas Border. Truck is a 2018 F250 Platty 6.7 with 35k. It is 14 months old.
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post #15 of 51 (permalink) Old 08-12-2019, 12:05 PM
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Sweet rig Willie, congrats!!

Casey
2016 Denali 3500HD - Starting from scratch.
Drop shackles. 285/75R18 RTs on Factory Wheels.

2018 Silverado 2500HD - Sold
2015 Silverado 2500HD - Sold
2012 Silverado 2500HD - Sold
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post #16 of 51 (permalink) Old 08-12-2019, 12:12 PM Thread Starter
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Sweet rig Willie, congrats!!
Thank you sir. Can't wait to start the build.
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post #17 of 51 (permalink) Old 08-13-2019, 07:32 AM Thread Starter
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With every new truck we learn new things. Here is what I learned this morning. Looking to go with brighter LEDs for driving and fogs, I checked to see what bulb they use. Unfortunately, GM has molded these bulbs right into the light assy so you can no longer just replace a bulb, you have to replace the whole assy. Before you say BS, I looked twice and called a local GM parts house to verify. They are molded in and the hole assy has to be replace when they go bad or if you want go brighter, LED mfg are going to have to start making the whole assy. UGH. I am all about being able to see good at night. While the LEDs are bright, they could certainly be brighter, especially the fog lights. Guess I will be waiting on aftermarket light assy to go brighter. In the meantime, the intellibeam high beam lights works well switching between high and low beam when the truck detects an oncoming vehicle.

Next, the transmission. So as you know the 2020's come out with a new Allison 10 speed tranny. Looking under the truck today to check things over, I noticed there is no external filter like on the older 5 and 6 speed Allisons. Hmm. So I continue looking things over and notice I don't see a trans dipstick. When I looked under the hood, same thing I could not find a transmission dipstick. A check of the manual states it is not usually necessary to check teh trans fluid level. (I beg to differ) The onlyl reason for fluid loss is a trans leak or overheated trans. The vehicle is not equipped with a trans fluid level dipstick. There is a special procedure for checking and changing the trans fluid and should only be conducted by a GM service specialist. Blah, blah, blah. Somewhat disappointing. GM recommends the Dexron ULV Trans fluid.

While looking the 6.6L Duramax Engine Supplement over, I took a quick look at the service recommendations. Here is what I found to be recommended:

Oil and Filter every 7500.
Fuel filter every 22500.
Air Filter, Transmission service every 45000.
No mention of differentials whatsoever.

My plan for the L5P Powertrain is to swap over to AMSOIL full synthetics when the time comes. Engine oil and filer first. Was looking for a place to install their BMK27 oil filtration bypass setup like on my older Duramax's. Previously we were able to use a aftermarket bracket made by Madjack Diesel. Going to be working with them to see if we can get another bracket for this application.
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post #18 of 51 (permalink) Old 08-13-2019, 08:03 AM
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Thanks for the insight! Already have a few cases of Amsoil Signature Series I just bought for my Ford that was traded and will be switching out this weekend. Or whenever the EA series oil filters get here.

On the Tranny I just do it from the lines going to the cooler. Replace with Amsoil -- you can see the fluid change color very slightly then you have gotten most of it out.

Looks like GM is making it harder and harder to do Mainternce outside of a dealership.
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post #19 of 51 (permalink) Old 08-13-2019, 09:08 AM Thread Starter
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Originally Posted by Busa Dave View Post
Thanks for the insight! Already have a few cases of Amsoil Signature Series I just bought for my Ford that was traded and will be switching out this weekend. Or whenever the EA series oil filters get here.



On the Tranny I just do it from the lines going to the cooler. Replace with Amsoil -- you can see the fluid change color very slightly then you have gotten most of it out.



Looks like GM is making it harder and harder to do Mainternce outside of a dealership.
Yeah I agree. They are definitely trying to keep the DIYer from doing their own work. Time will tell.

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post #20 of 51 (permalink) Old 08-23-2019, 04:44 AM Thread Starter
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So we have taken a couple days to load out our store with what is currently available for the 2020s. While the list is small right now, we are seeing new stuff added from our WDs daily.

Check out our store here.

This is what we have ordered or done thus far that is non-powertrain.
40% Solar Guard tint on sides and back windows
Nearly clear Solar Guard tint on the front windshield
Banks Power Idash 1.8 Datamonster
Fox racing shocks
Sulastic shackles

Powertrain wise
PPEI custom emission compliant tuning through an ECU swap and HPTuner device to flash it.

Still trying to figure out which tonneau cover I want to go with. I have used Lund tri-folds for years but thinking I might try something different.

What are you all thinking about doing? Let's talk it up and see if we can help everyone.
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