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The light on the 4wd switch is not coming on. The code on the scan tool is U0102 on 2013 GMC Sierra 2500 HD

What needs to be done. I am a tech in Ghana, there is no dealer out here. It is a Denali HD 2013 model 6.0l 6spd tranny, with only 5000 miles. Any help will be appreciated.

Asked by for the 2013 GMC Sierra 2500 HD
2013, see dealer for warranty repair!
1 more answer
ALL DATA DOESN'T LIST UO102 CK AGAIN AND REPOST