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GMC Canyon Questions

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Doesn't surge until engine is warm. Idles good. Plenty of power. Not detectable on tachometer during heavy acceleration. Very noticable when reducing throttle upon reaching steady speed.
My four wheel drive stopped working. I noticed that the harness going to the transfer case was rubbing on frame and corroded. I then replaced the harness and the 4x4 started working again. My issue now is I made the mistake of turning on the vehicle while the harness was unplugged and the Service ABS and Service 4WD warnings have shown up on dash and 4x4 doesn't work again. From what I have read, this may have "locked up" my TCCM. Is there something that I can do to reset this or is this a dealer fix only? Thanks.
T-case encoder motor has been replaced because it wouldn't shift,it shifts to four Hi and four low and back to 2 wd with no problem but light flashes and the front actuator doesn't engage. Was able to control actuator with scan tool but won't engage on its own. Checked light blue control wire at actuator with dvom had a fluctuation in voltage from 8 to 10 volts.no codes are being set.
I recently bought a trailer and when i hooked it up the running lights came on the signals work but when i push the brake only my truck brakes flash not the trailers. Do i have a bad trailer light converter box?
There are many people having this problem. Is G M standing good for any of this?
turn signals and brake lights do not work. Checked trailer with neighbors vehicle and everything works on trailer. Turn signals and brake lights function on the truck.
I would like to know if there is a way to release it from the stuck position, or if it has to be replaced, where is it located on the transmission? Would it be inside the Bell Housing or inside the fluid pan? Thanks
battery cable end is hot . truck won't start unless you jump start it.
For a awhile now my truck driver door has had this problem when you exit the truck things don't power off inside the truck if it's raining and I forget to turn off the wipers they will
Still work same with radio. Opening the passenger door was the only way to power it down now that doesn't work. Thanks for help!
turn signals on front will not work checked fuse under hood was good is ther a incab fuse box.
after several hours it will start right up,it may be days or weeks between incidences.
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