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Service 4wd Message And Scan Codes
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Question
hpracing10
2003 silverado halfton- been getting the service 4wd message each time I start my truck, and I can't shift out of Auto4wd. Also, whlie in Auto4wd, when the back wheels spin, the front don't engage so all-in-all, the 4wd is not working. I took my truck to a gm dealership to scan for codes and it came back with 10, YES 10 different codes that were coming from the transfer case he said. I would like some advice as to where I should start. He said that most times if the code B2725 is thrown, in MOST cases it is the dash switch. But why am I getting so many others? Someone please help!
BO790-transfer case nuetral indicator circuit malfunction
CO550-ECU malfunction
CO379-front axle control circuit malfunction
CO374-general system malfunction
CO359-discrete output circuit malfunction
CO306-motor A/B circuit malfunction
CO300-rear propshaft speed sensor malfunction
U1301-class 2 communication circuit low volts
B2725-mode switch circuit malfunction
U1000-class 2 data link malfunction
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