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U1026 Diagnostic Trouble Code Discussion for September 2008

Loss of ATC Class 2 Communication


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Trouble Ticket Help Requests for DTC U1026
Help Request Posted
2000 Chevrolet Silverado 1500 5.3L No Start, MIL Lamp on VIN: 1GTEK14T1Y
U1026: Loss of ATC Class 2 Communication. Well Ive been doing this for over 30 years and today may be the day I got in over my head. This truck belongs to my brother so thats even worse. Heres the issue. Truck came in with tranny locked in default mode with ses light on. Had the codes listed above. Th...
September 10, 2008
2002 GMC Envoy SLE 4.2L guages inop VIN: 1GKDT13S22
U1026: loss class 2 com. Here's a good one for you GM techs . on every module I can get loss of communication codes. Basically it has to sit over night first thing in the morning at about 50 degrees the IPC will only have a speedo and a tach the other guages are inop and idiot lights ...
September 25, 2008
2002 GMC Envoy SLE 4.2L guages inop VIN: 1GKDT13S22
U1026: loss class 2 com. Here's a good one for you GM techs . on every module I can get loss of communication codes. Basically it has to sit over night first thing in the morning at about 50 degrees the IPC will only have a speedo and a tach the other guages are inop and idiot lights ...
September 29, 2008
2000 Chevrolet Silverado 1500 5.3L No Start, MIL Lamp on VIN: 1GTEK14T1Y
U1026: Loss of ATC Class 2 Communication. Well Ive been doing this for over 30 years and today may be the day I got in over my head. This truck belongs to my brother so thats even worse. Heres the issue. Truck came in with tranny locked in default mode with ses light on. Had the codes listed above. Th...
September 10, 2008
2002 GMC Envoy SLE 4.2L guages inop VIN: 1GKDT13S22
U1026: loss class 2 com. Here's a good one for you GM techs . on every module I can get loss of communication codes. Basically it has to sit over night first thing in the morning at about 50 degrees the IPC will only have a speedo and a tach the other guages are inop and idiot lights ...
September 25, 2008
2002 GMC Envoy SLE 4.2L guages inop VIN: 1GKDT13S22
U1026: loss class 2 com. Here's a good one for you GM techs . on every module I can get loss of communication codes. Basically it has to sit over night first thing in the morning at about 50 degrees the IPC will only have a speedo and a tach the other guages are inop and idiot lights ...
September 29, 2008