Iv'e been reading about how to change out the vacuum switch on the transfer case, but I can not find or see it. M y 2001 S10 Blazer is stuck in low range and won't go to 2 HI. I would just be happy to get it int 2 HI and leave it there Is there any way to do that? I have had it for 4 years and never used 4 wheel drive. Thanks for any help you can offer.