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2006. But it's a Duramax 2500 HD

In my truck you pull the front drive shaft then remove the three bolts and unclip wire harness for encoder motor removal. Pretty easy. I think may have a Genuine GM encoder motor if you are interested. I bought the wrong one. 🤦‍♂️ And they would not take it back. 🤬

Yes you did. We need all of you. You are our eyes and ears on the forum. And we appreciate it. Funny thing is we get many of them before they ever hit the forum. Some sneak and weasel their way through somehow. Lol

Not sure, but I wish they'd just go away.

What is it with these spammers? Jeesh. They need to get a life...

Ferman do you have a link for this Tech 2 scanner please?

I soldered the connections, still didn't work. I bought a new switch, still no worky. 🤬 I've replaced everything except the transfer case. Only thing I will do now is recheck for proper ground. I did this first thing last year, but just read that sometimes the thin wiring breaks. I would love...

I pulled switch apart. Looks like the top 2 prongs are broken or cracked. I wonder if I resolder these if the switch will work? I suck at 12v diagnostics and soldering.

Anyone know how to test these switches with a multimeter?

SO... The saga continues. I replaced the encoder motor. Still no 4wd. Only thing left for me to replace is the switch!!! 🤬

We've had a few more sneak by somehow. Thanks for the heads up.

I'm not sure how to check it either.

Have you checked the switch yet?

My AGM batteries were fine. Then they were not. Binary. Either worked or it didn't. Not like the slow drain from lead acid. They fell right off the cliff. I tried charging with smart charger. No good. Snowflake as they suggested, no good. Regular type charge. No good. I couldn't save them. I...

Any way to confirm with a good multimeter?

Could be bad ground or a bad switch. At least for the 2006 NP263XD Duramax transfer cases. Mine is doing the same exact thing. I started with the ground. It was fine, but I ran a wire as a backup to a good source up front. I don't have a means of testing, so I replaced front actuator in front...

Must have been for a 2500hd gasser.

I thought 2006 2500/3500 Duramax diesels only came with NP263xd transfer case?

I think that is what the switch talks to inside the encoder motor

Did you get rid of the cat when you did your exhaust? Or go with a cat back setup?