Repairing my intermittently faulty (Auto) 4WD switch, as well as discussing errors in the wiring diagrams and showing the correct information in a Technical Service Bulletin (which essentially just says to replace the switch for this fault). Please note that I do make an error in checking the voltage at the switch while transitioning from simply looking for a change to checking the voltage specification provided by Service Information (I do correct myself in the video). This video was filmed casually and was not meant to be a direct How-To video, but it may be helpful to you in your own repair with the proper knowledge - which is also why I always include the vehicle information in the title. Thanks for watching!
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2001 GMC Yukon XL K1500 5.3 GMT800 4WD Switch Repair "Service 4WD" and B2725 - No Parts Required
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