WTF??? Converter does not flash on highway roll... it shifts into 4th?????
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Teching In
Join Date: Jun 2006
Location: Tulare County
Posts: 29
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you might wanna check your tourqe converter clutch solenoid, converter, valve body assembly, oil pump assembly or your PCM. That is what the ASTG General Motors techtran manual states as the known cause for your problem