How do you know the harness and connectors are good? Just looking at them won't tell you.

 

It's not unheard of that these wires get damaged or torn from age. You might want to peel back the harness and inspect up to 6 inches down the wiring to see if there is any damage. You would also probably want to verify voltage is correct on the wiring.

 

Could also be a bent pin on the connector on the MAF itself. Can't tell you how many times I've seen the result of a DIYer trying to plug something in and getting the connector cocked just enough it bends a pin. Or it got bent in transit. Then they figger they just need to use a little more force and it'll be OK. So when the original code comes back along with new ones, it's off to the shop. Also verify that the new MAF has the same number of pins and that they are in the same positions on the connector as the original.

 

Is it a gm or ac delco Maf sensor these trucks have never liked things that aren’t oem. Just saying it’s possible you got a bad part but def check your wiring better maybe break out the old power probe if you have one 🤷‍♂️

 

Yeah, for my '04 3500, I replaced the MAF with one from NAPA (IDR the brand), it mostly worked, but in cold weather (like -20C) I would occasionally get P0101 codes with it. Replaced it with a used GM MAF, no more P0101 errors regardless of temp.

 

Yeah it’s weird but prob how their made components are close but no cigar 😂

 

Further research online I found a Technical Service Bulletin. No: 18-NA-217
There’s a wiring harness underneath the truck for the fuel composition sensor, which is known for the wires to get damaged creating a short circuit. In turn creating all the codes and making cruise control inoperative. Going to double check if this is covered under my warranty. If not the repair instructions are straight forward.

 

Well after following the instructions in that TSB and replacing fuse #43 (only states it’s for the engine) under the hood no more check engine light and associated codes.

 

thanks for following up with the outcome.

 

Yeah we appreciate you I’ll bookmark this in case I ever have this issue 😎👍