Problem solved 22 silverado with NHT and multiple codes

[flattop]

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