[oak1971]

I received a "Service 4WD" message on the Driver Information Center display today. Four wheel drive is out. High range, Low Range no dice. Stealer says gimme a Benny and I'll tell you if your extended warranty covers it.

 

[SFLTruck]

I received a "Service 4WD" message on the Driver Information Center display today. Four wheel drive is out. High range, Low Range no dice. Stealer says gimme a Benny and I'll tell you if your extended warranty covers it.

I would look for wire harness chafing. This has happened to a few others and it was a poorly placed harness across a sharp edge that was the root cause.

 

[oak1971]

I was wondering the same thing, thanks! Will check it out.

 

[Coloradorob]

I was wondering the same thing, thanks! Will check it out.

Do you use the 4x4 much?

 

[oak1971]

In the winter, quite a bit.

 

[SFLTruck]

I remember one thread where the poster found the cable thet runs the 4X4 actuator motor rubbed through as it went over the transmission.

Let us know what you find.

 

[Coloradorob]

And check the fuses

 

[Coloradorob]

And check the fuses

 

[oak1971]

I remember one thread where the poster found the cable thet runs the 4X4 actuator motor rubbed through as it went over the transmission.

Let us know what you find.

Will do.

 

[oak1971]

And check the fuses

Noted.

 

[oak1971]

Turned out to be an actuator. My extended warranty covered it for a $100 deductible. Truck is back, seems to work.

 

[bigoilbob]

Turned out to be an actuator. My extended warranty covered it for a $100 deductible. Truck is back, seems to work.

Glad to hear it. I've had a couple of failures to get in to 4 low, but success after a couple of tries. I chalked it up to me not doing it right.

 

[oak1971]

Now I'm waiting for another snow storm to try things out for real.

 

[Inacanyon]

I’ve noticed a bit of a clunk the last two times I went into auto. Anyone get this same and will turn into a problem?

 

[oak1971]

I didn't have any noises, just a whole lot of nothing.

 

[Vinolush]

Ahhh... the convenience of an electronic actuator.....

Just gimme a metal rod shifter and some linkage!..lol

 

[oak1971]

Thing is I have had 3 other GM trucks and had zero 4wd issues including one with over 200,000 miles.