I have a 2004 chevy z71 and the 4 whell drive quit working. i had a friend of a friend who is also a mechanic hook it up to a computer and he said that control module near the speedometer behind the dash is the problem. he said the imfo from the switch is going in but nothing is coming out to tell the 4X4 to engage.what is that part actually called and where can i get it and how much does it cost? also does this sound like the part that is the problem
SOURCE: 2000 F350 Super Duty Will not go into 4 wheel drive
I have recently had this problem with a customer. It seems the 4x4 low will only engage in neutral with the brake applied. And also check fuse. Then select drive and you will feel it lock in. Don't "goose" the fuel when attempting this.
SOURCE: 2002 Chevy Trailblazer's 4x4 control
I have a 2002 chevy trailblazer 4x4 control light not working. when trying to switch from 2wd to 4wd nothing happens. no ligth no engaging of the drive
SOURCE: 1998 Chevy Blazer 4x4, $ wheel drive won't work (both 4hi & 4lo )
Reset the computer by disconnecting the battery. This should solve this. nutetral is for the four lo only to engage.
Mike
SOURCE: 01 f150 4x4 4whell drive will not engage lights on dash come on
I am going to assume that you have auto 4x4, and not manual shift base model.. it just sounds like the servo motor that shifts between 2x4 and 4x4, has gone bad
question:
does it still engage into low range, even though it is stuck in 2x4?
SOURCE: 4 lo working, 4 hi stopped working , A4WD never worked
Hi my name is Juan and I do own a trailblazer with the same year 2002 and I read the problem you have let me try to help you Have you try to shift to 4hi with your transmission in neutral ? the transmission needs to be in neutral in order to shift the transfer case to 4hi and the vehicle needs to be completely stooped also is your service 4wd light on?? if the light is on your transfer case needs service and it can be as simple as the switch inside your car or a solenoid that has not been detected by the computer
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