Jump to content

Problem solved 22 silverado with NHT and multiple codes

flattop
 Share

Recommended Posts

flattop Enthusiast

flattop

Posted
Posted

Hello all,

 

My 2022 silverado 4X4 crew cab with NHT (Max Tow) out of the blue last month threw a check engine light. The truck has 110k and had basically been trouble free besides the A/C compressor that extended warranty covered at 99k. Anyways the check engine light came on around 1/1/26 and these were the codes, U01B0,U0623,U0632,U0633 and U1345. 

 

A reset only gave me about 80 miles and they all returned. So before I really started to dig in to this issue, the radiator plastic end cap decided to crack about 3" on the drivers side a few inches from the top! Crazy, a 4.5 year old radiator goes bad!  So this problem takes precedence and I find a NHT radiator, not easy, but get it ordered and begin the disassembly process. 

 

New Radiator was 3 business days out, so i did some research on those codes. One of them referenced communications with battery module and one was talking about the radiator shutters and electric fans. So as I was looking in front of where the radiator goes I see a connector that would be right where the shutter drive motor would go. The NHT trucks have the shutter system deleted from the factory, but they left this 3 conductor female connector, open to the elements, no safety block off plug.

 

Well it was loaded with green corrosion and road salt residue. The Hot Rodder in me wanted to just cut off the connector and tape them up, but I got a pick and with wd-40 cleaned all the residue and put some dielectric grease on them.

 

Re installed radiator and began putting miles on the truck and to my surprise the check engine codes have all disappeared! As of today the truck is at 112k with no issues.

 

Something to look for if you get this set of codes.

 

Flattop

 

 

 

 

 

 

 

  

  • Like 4

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • Chuck FB
      2 speed transfer case optional now?

      By Chuck FB · Posted

      Yes, and also pulling heavy trailers or a large camper up steep grades as well as descending grades such as the more rustic off road camping locations and using engine braking with that low gearing as well as soft ground can just suck the power . I realize pickups these days tend to have an over all lower first gear ratio compared to automatic transmission pickups from years back so that has helped a lot in its ability in high range but there comes a point if in four wheel drive the torque runs out at the wheels, certainly with a gas engine. They don't put two speed transfer cases on pickups for a cool factor, they have a function if one needs that massive torque to the wheels that high range can't deliver. 
    • Grumpy Bear
      Grumpy Bears 2015 Silverado 2WD

      By Grumpy Bear · Posted

      Notes 7/18/2026   3,400 miles on this batch of Mobil 1 Euro 5W40 since the GDI pump replacement. Alcohol runs very clean when ring seal is tight and the sump isn't getting hosed with fuel. Checked oil level at fill up today as is my practice and grabbed a white Kleenex to look at the color. What color?  I was going to change it but.....  
    • Another JR
      2 speed transfer case optional now?

      By Another JR · Posted

      4 low is really nice on steep boat ramps. 
    • Chuck FB
      Gas Prices

      By Chuck FB · Posted

      Interesting, I suspect I would have fueled up in Lee Vining as the day prior I would have filled up either in Laughlin or near there and maybe again before I entered Death Valley and once out the other side late that evening as I kept on driving into the night up near Lee Vining. Next morning I most likely fueled up in LV before heading over Tioga Pass into ( as I refer to it as "Yose .... Mite" 😁 ). And again that was 19 years ago but the price then must not have jumped out at me like the 5 bill a gallon theme of nutty cult hippy country Big Sir or head so far up their rear Aspen. I'd be curious to know where the highest prices are in the lower 48, I probably would not be far off to guess somewhere in Cali forn ie. Coldfoot and Prudhoe bay may have those prices beat but that is a whole other world up there and when prices are more normal elsewhere that is about what they can be up there I believe in no mans land. Anyway interesting that the 395 corridor is hosing people and the thing is, its tourist season and its not like there are a lot of competition options when driving up that highway from what I could see. Yup, big ole Boaterhomes and various other RV's ahead and behind me at the Yosemite entrance gate and they have to get their fuel somewhere.  
    • Atlas
      Gas Prices

      By Atlas · Posted

      Those can be high, as well as the big California cities. The ones that will pop your eyes out are the 395 corridor on the Eastern side of the Sierra Nevadas. Lee Vining, $7.19 for regular and $8.89 for diesel is what the Google said right now.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...