Help service 4wd???

[LipTahoe]

I am new to this site and seeking some help. I just bought a White 2003 Tahoe LS with 63,000 miles. It originally had 265/70 R16 tires and I added 265/70 R17 tires. After about 5 miles of driving my SERVICE 4WD light came on. It comes on and stays on. Could a change in rim size do that? Does it need to be reprogrammed? The fluid is fine. I'd appreciate any help or opinions you may have to offer.

Thanks,

Jamey Liparulo

 

[DougO]

Search the site their is a lot of good information out their. Mine started at 48k i took it to local guy that could read the body codes and he determined it to be the encoder located inside the transfercase shifter motor. Very common problem i would consider it a maintenance item . I did some reasurch found most dealers charge 7-8 hundred bucks, they change the whole motor assembly. But if it shifts you probley only need the encoder the part and gasket is about 80 bucks on line. I down loaded the instructions and pictures off a forum and did it last week with a hand in a cast it took about a hour.

Base on what I have seen on the forums on all gm trucks if you own one you need to learn how to change one other wise it will cost ya.

Good luck Doug