GMC Sierra owners have reported 12 problems related to transfer case (under the power train category). The most recently reported issues are listed below.
The manual shift on the fly system (msof) with new venture gears automatic transfer case is defectively designed. A metal anti-rattle clip works it way through the case housing, causing all fluid to leak out of the transfer case. The clutches then burn out rendering the transfer case useless. The result is no 4 wheel drive (no power to front wheels) when shift on the fly is pressed, leaving driver sliding on snow or ice--which happened to me in a near wreck. I recovered from the slide and got the vehicle home and then to a repair shop (once the snow melted) for a new transfer case (repair ongoing). Drivers may rely on the 4wd in inclement weather to certain conditions and be injured when the 4wd does not engage due to the defective transfer case. . Read more...
See all problems of the 2004 GMC Sierra.
The contact owns a 2003 GMC Sierra. While the contact was examining his vehicle he noticed that there was oil dripping from the transfer case under the vehicle. The vehicle was taken to the dealer where the contact was informed that a cover should be put on the transfer case to stop the leaking. The vehicle was serviced by the dealer and there were no prior warnings. The current and failure mileages were 76000.
See all problems of the 2003 GMC Sierra.
Within 4 months of purchase, was driving at approx. 25 mph when transfer case shifted into 4 high on it's own. Shut off vehicle, restart and able to put back into 2 wheel drive. Happened on and off for a little more than a month when it went to 4 lo while driving at 30 mph through town. Unable to reset. Limped it the 2 miles to dealership for diagnosis. Cost me $1200 to have the transfer case rebuilt. Smoked the clutch pack, burned out 2 bushings and bent shift shaft. Had second issue of shifting on it's own, may 15th, 2014. This time it cost me $500 for the shift motor to be replaced. Second problem, speedometer reading incorrectly or not at all. Been going on for about 3 years sporadically (apparently the little drive "motor" on the back of the instrument cluster, $300 replacement or, found a company to rebuild with new "motors" for under $200). Passlock issues started in Jan 2014, has left me stranded a couple times now. Can't get a good answer from dealer as to how to repair other than "bring it in and we'll hook it to our diagnostic system" (I. E. Pay us lots of money). Also having issue with check engine light on constantly. Intermittent engine miss on multiple cylinders. Rough idle, crappy mileage, but not down on power. Miss seams to go away off idle and not noticeable under load. New plugs, wires, etc, etc, etc. . . . Haven't figured this one out yet. Same answer from dealer (pay us more money please). Lastly, air bag light came on in Dec of 2012. Never crashed or bumped but had to replace left front air bag sensor. Love the truck, currently has 154000 miles but I'm getting frustrated with all the little electrical "glitches" and the dealer won't help a bit without the normal answer, "bring it in and we'll hook it to our diagnostic system". It's dang near $200 (diagnostic charge) just to get my truck in and out without even getting anything repaired!.
See all problems of the 2005 GMC Sierra.
4 wheel drive transmission will shift from 2 wheel to 4 wheel low while driving. Sometimes it will shift to neutral. This can be very dangerous. You basically don't have the control of the vehicle that you thought you had.
I have been having trouble with my four wheel drive. The engine seems to bog down like I am pulling something. Took it in to get looked at and the repairman had to replace a part saying that it was automatically kicking in and out. He fixed it and it was fine for about 6 months and now it is doing it again. You can even hear it in the engine, it sounds like it down shifts to pull something.
I own a 2001 GMC Sierra. I noticed that when I put my truck in 4 low on my 4x4 (manual shift),and I put the truck in reverse, you can feel the torque. When I go and put the truck into park it starts to grind while engaging in the park position. I brought it to a GMC dealership and they told me that it is normal for the transfer case to do this. If you ask me, if there is grinding noises on moving parts, something is not right or "normal".
See all problems of the 2001 GMC Sierra.
The consumer heard a clunking noise and a pulsating sensation in the steering column while making turns. The consumer was told that the wrong lubricant was used at the factory for the steering column shaft. The shaft was unable to be lubricated because the lubricant would not penetrate between the first and second sleeve. The intermediate steering shaft was replaced and the problem got worse. Four wheel drive warning light came on.
I purchased my 2004 GMC Sierra 1500 4x4. I put it in 4 wheel drive to go through some ice and it made a very loud clank. Not long after that when I put it in reverse or drive it also made the same loud clank. It did not sound like that when I first bought the truck. Now the truck has trouble going into 4 wheel drive and also gets hung in reverse. It has almost caused me to get in a bad accident. My cruise control also has have 6 malfunctions. I had the dealer fix it initially. I have fixed it subsequently due to the fact they said it was a blown fuse. The 4 wheel drive and transmission problems were addressed 3 times and all the dealers said nothing was wrong. An independent mechanic said there is a defect with my transmission and transfer case. That is it with the truck. Now just last Thursday Feb 3, my bridgestone tire separated. My tire dealer said the tire was defective. There was no evidence what so ever that there was any damage to the tire to cause the blowout. It should not have separated. It caused a fire. It was quickly put out.
Transmission will slip every so often, also it will make a loud noise when shifting from 2nd to 3rd. This happens alot but not every time. The four wheel drive makes a grinding noise as you start moving and continues for a good distance (4 high).
The contact wa shaving problems with the push button module that engages the four wheel drive. The vehicle is getting stuck between two wheel and four wheel drive. He has talked to gm, and vehicle was not under a recall. This has been happening for three years. The vehicle has not been taken to the dealership for any repairs.
I have a 2003 GMC Sierra slt ext. Cab z71 (4x4), the 4-wheel drive is not working, no lights show up on the buttons. The dealer has attempted to replace the 4wd switch, this did not fix the problem, they still have the truck. The truck is less than a year old and has 20,700mi. There are service bullitens for the problem, but there is no permanent fix. Why sell a 4wd product if the 4wd will not work?.
When the 4 wheel drive light illuminates on the dashboard vehicle fails to accelerate. This is caused by the transfer case encoder motor locking in 4 wheel drive. Dealership replaced the part, but cause of the failure is undetermined.
|Problem Category||Number of Problems|
|Automatic Transmission problems||
|Power Train problems||
|Differential Unit problems||
|Noises During Shifting problems||
|Transmission Failure problems||
|Transfer Case problems||
|Transmission Gear Slipping problems||
|Manual Transmission problems||
|Axle Assembly problems||