Hello,

Just bought a pristine looking 2000 Chevy Blazer. Looks showroom new.

Aside from a weak lock motor on the driver's door, a power mirror switch that needs replaced, and a CD player that doesn't play CDs, it works very well...

But the 4 Low will not work.

I have 2-hi, 4-hi auto, and 4-hi, but no 4 lo. It tries to shift - there is a definite "thunk" from the transfer case - but the light stays flashing and goes back to whatever mode it was in before. Just a quick shift in and shift out, I guess.

When I shift, I am in neutral and I have tried it with my foot both on and off the brake.

Any help?

Thanks,

Josh <><

 

Try it while rolling about 3-5 MPH. Sometimes the gears are not lined up which prohibits the shift.

To read any codes from the TCCM, you need a Tech2 or equivalent full featured scan tool. There may be a code that would point you in the right direction.

Has it ever worked for you? It is is possible that there is something damaged inside the transfer case prohibiting the shift, but that is not very likely.

 

Hello,

It doesn't work while rolling.

I was wonderin what type of scan tool I'd need; I never remembered having one that would do this.

Looks like I'm off to the dealership. It'd be nice to have a new scan tool, but I'm not laying out the money for a full featured one!

Thanks!

Josh <><