2002 Chevy 2500 HD 4WD 8.1 Allison Auto Trans

[348tripower]

Up date.

 I pulled the nsbu switch off and found it was the old design. Replaced with the new design. We had the snow storm two days later and he has had on problems. It has gone into reduced power once since but he shut it off and restarted it and drove away. I haven't seen him. No news is good news?