QuestionI have a problem with my 4wd lights they all stay on . The 2wd, neutral, 4wdlo, 4wdhi and the 4wdauto lights. I try to change it from 2wd to 4wd, but the lights won't come off.this is a GMC 1999 Gimmy. It won't change gears as before its kind of stalling.
AnswerA.G.
I am not familiar with the shifting system on this vehicle, but from what you have said, I would suspect that the transfer case is shifted electronically. If this is the case, you probably have a faulty shift circuit for the transfer case. This could be as simple as a pinched or broken wire, bad ground, or a faulty switch or sensor.
I would not drive it any more than you have to at this point. If the system has a circuit problem, you may chance binding the gears, and tearing up the transfer case. If this happens, you could be facing a very expensive fix.
If you are mechanically inclined, I would suggest that you purchase a repair manual for your rig, and trace out the transfer case wiring. Chilton's or a Hayne's manual can be purchased at most auto parts stores for $20. They have a lot of information on basic trouble shooting, and repairs, including a list of special tools that may be needed for a specific job, nut sizes along with torque settings. These manuals are designed for a year or range of years for specific vehicles, and are invaluable if you are planning on doing any repairs, or maintenance yourself.
Carl
