I have this problem, the 4*4 dash lights keep blinking and then return to 2HI, i checked the Tcase and found that the vacuum switch had oil in 2 lines, 4*4 its not working, is there a fix to solve this problem other than buying a new 3lines vacuum Switch?.

Thanks.-

 

No, change that switch before this happens GMC Sonoma & Chevy S-10 Transfer Case Vacuum http://john-stichnoth.com/SonomaT-caseSwitch.htmlSwitch and this http://www.s10extremist.org/tech_art...front_diff.htm

 

thanks men, i´ll try to find one.

 

Dammnnn it will collapse the whole system, thanks i´ll try to find one vacuum switch.