i have a 2000 chevey blazer 4x4 i tried replacing the dash switch alrady that didnt help. So when in park or driving in 2 hi i try pressing 4hi and nothing happens. In nuetral i press 4 hi and both hi and low will flash and it will go to low. When i press 2 hi sometimes it will go into 4hi most times back to 2 hi and also if you press 2 hi 7 times it will go into 4lo i need to know if anyone knows the solutuion to the problem 4 lo engages fine. And its wierd because you have to be in nuetral for anything in park or drive 4 low wont even blink

 

Try searching there are dozens of threads on this.

Not trying to be rude or anything, just have seen loads of posting for faulty 4x4 electronic switch

Might be worth it for someone to go threw all those copy the tech info and paste it into the Do-It-Yourselfsection

 

Yeah I agree MNHawk, but you will still get the user who does not know how to search a website whining about not finding information... Should start another dedicated section to just 4x4 problems.

But to get back to the problem at hand, you need to check your TCCM under the dash to see if it has stored codes. If the TCCM has fault codes stored then it goes to its "default" mode of two modes of operation 2HI and 4LO, until you fix the problem that created the fault codes you will continue to have this problem.

And you should do a search here on the TCCM to see how to check for codes....

 

Yea, a special area just for 4x4 issues and T-Case would be nice. Just like having an interchange area also would. Due to searching for some parts I have found several things that interchange to the Blazer that is not normally listed. Like hoods interchange up into the 2000's and other goodies.