08 Tahoe 4WD not engaging

[07AZTahoe]

Hello,

I have been searching for a while with no luck finding anything quite like my issue. I have a 2007 Tahoe that the 4WD selector switch is illuminated for 2WD but when I change the switch to Auto - 4WD - 4WDLO nothing happens, the light does not change and the transfer-case does not change either. I replaced the 4WD selector switch with a new one from the dealer with no change. Any help would be greatly appreciated!

Kenneth
2007 Tahoe
245k miles

 

[89Suburban]

Hello,

I have been searching for a while with no luck finding anything quite like my issue. I have a 2007 Tahoe that the 4WD selector switch is illuminated for 2WD but when I change the switch to Auto - 4WD - 4WDLO nothing happens, the light does not change and the transfer-case does not change either. I replaced the 4WD selector switch with a new one from the dealer with no change. Any help would be greatly appreciated!

Kenneth
2007 Tahoe
245k miles

Not getting any codes?

 

[Fless]

You'll need a tool that will read the 4wd codes; not all do.

How old is the encoder motor on the transfer case?

 

[07AZTahoe]

Not getting any codes?

No codes at all.

 

[07AZTahoe]

You'll need a tool that will read the 4wd codes; not all do.

How old is the encoder motor on the transfer case?

Transfer case and trans were replaced about a year or so ago…

 

[Fless]

What make and model code reader are you using? Is it capable of reading the 4wd codes?

So they probably used the old encoder motor on the transfer case and didn't put a new on one. Or does your paperwork show differently?

 

[07AZTahoe]

What make and model code reader are you using? Is it capable of reading the 4wd codes?

So they probably used the old encoder motor on the transfer case and didn't put a new on one. Or does your paperwork show differently?

I will have to look again at the paperwork, but I have a code reader that will read abs trans and engine and brake codes… but I’m not sure about the 4wd codes. And where is the encoder motor at and can I just order a new one?

 

[Fless]

You might find this interesting. And why not do some diagnosis before guessing on parts? -- Up to you, though.

 

[07AZTahoe]

You might find this interesting. And why not do some diagnosis before guessing on parts? -- Up to you, though.

I will check it out. I just want to avoid going to the dealership! lol
Checked out the video, looks like some good info. I will take a look at all of the parts and see if I get power and go from there. Thanks.

 

[89Suburban]

You might find this interesting. And why not do some diagnosis before guessing on parts? -- Up to you, though.

I like that guy, he has good vids.