Help! I have a 99 Suburban, 454, 2500. recently wouldn't engage 4WD. Dealer tells me need new shift motor, switch.....almost $1200.00. They said parts available locally. That was 5 days ago. Called to check status today and was told that service manager would call me right back. This was 9:30 am. Day has now passed and I have heard nothing. What else can go wrong in this situation? Burb was running fine when I took it in..just couldn't tell whether I was in 2 or 4WD...front end felt like 4WD (sort of). Could the transfer case itself be out? What transfer case is this? I think my configuration is NP8. Auto 4WD, w/neutral and 4lo, 4hi, 2WD. Lights just went out on switch when in 4WD. I'm strapped for $$. Can I just run as 2WD until I can get the $$ for proper repair? Need this rig to pull my 7500# travel trailer.