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U1026 Diagnostic Trouble Code Discussion for February 2004

Loss of ATC Class 2 Communication


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Trouble Ticket Help Requests for DTC U1026
Help Request Posted
1999 Chevrolet Tahoe 5.7L MIL Lamp on VIN: 1GNEK13ROX
U1026: Loss of ATC Class 2 Communication. ... intermitent problem. It will go into 4WD by its self and 4WD push buttons will come on. I went to go check it when it had its problem but when I got in to the truck I stepped on the brake I heard some clicking and than it was okay. The owner said he has ha...
February 25, 2004