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Old 02-10-2007, 09:59 AM
zamjohn zamjohn is offline
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01 Silverado- Shifting problems

My 01 Silverado has a significant shifting problem when it is cold outside. Problem is it won't shift up out of 2 until it has run for a good long time and by that I mean it needs to run at least 20 minutes. It comes down from 2 and back up very nicely and once it is completely warmed it shifts up very nicely from 2. I know basically it is designed to do this but I find it just takes too long. In town driving rpms are just too high to keep up with traffic. Engine warms up quickly, 4.8 with auto and mileage is about 75k. I'm thinking must be a sensor not working correctly. Any ideas out there? Thanks John
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