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2006 gmc yukon 4x4 has an issue with the all wd, 2, 4hi &

Hi, 2006 gmc yukon...

Hi, 2006 gmc yukon 4x4 has an issue with the all wd, 2, 4hi & low buttons. intermittently, after they are pushed the transmission disengages while driving down the road. any thoughts, thanks?

Mechanic's Assistant: When was your transmission fluid last checked?

I'm not sure, it's a friends vehicle. i could ask him.

Mechanic's Assistant: Are you fixing your Yukon yourself? What have you tried so far?

I just experienced it this morning when i borrowed the vehicle from him. no repair attempted. it seemed to stay in gear after the awd button was pressed.

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

My friend mentioned that the disengagement has happended in the past, but only after the 4 low & 4 high buttons were pressed. thanks for your feedback.

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Answered in 1 minute by:
2/12/2018
Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: GMC
Satisfied Customers: 5,219
Experience: Owner at Carolina Auto Service &Sales , 20 years Experience in Foreign & Domestic vehicles
Verified

Hi, I'm Chad. Welcome to JustAnswer. I'm reviewing your question and I will be posting your reply ASAP.

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Hey how are you ,I will Try to Help you with This Issue

we have a the switch in the dash and 4wd module few relays , the firs thing needs done,is scanned with GM tech II scanner and read 4wd module fault and based on these faults we can pull up a pin point trouble shoot and be accurate ?

what is the mileage on it now and does he pull a trailer

If you do not mind me asking are you looking for the most possible causes and taking it to a repair shop or you are repairing it yourself and you need step by step instructions
Please Let Me Know
Thank You
Chad Farhat
ASE Certified Technician

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Customer reply replied 2 months ago
about 155,000 miles. not trailer pulling. while it's my impression that the switching mechanism between the awd, 2, & 4 is faulty, rather than the transmission itself. that is not clear. I'm trying to get an initial understanding of the issue before any attempts at repair. if it were simple to replace a part i might try to help him, otherwise i'd suggest he take it to a shop. thanks

we have a 4wd motor actuator on transfer cases ,that is most common , will need to pulled out and check the gears and electrical connection .

now is it the module or the switch making it do that or the actuator , we need to check ,

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Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: GMC
Satisfied Customers: 5,219
Experience: Owner at Carolina Auto Service &Sales , 20 years Experience in Foreign & Domestic vehicles
Verified
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Chad Farhat
Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: GMC
Satisfied Customers: 5,219
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Experience: Owner at Carolina Auto Service &Sales , 20 years Experience in Foreign & Domestic vehicles

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