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4l60 Harsh 1-2 shift and GM TSB 09-07-30-017A
First off im by no means a trans guy. A used car lot brought
me this truck, 140k on the clock with the above complaint
and appears to be a virgin trans. 
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| Engine | 4.8 L |
| Trans | 4-speed Automatic (Electronic) |
Vehicle Data
2003 GMC Sierra 1500 SLE 4.8L
| Engine | 4.8 L |
| Trans | 4-speed Automatic (Electronic) |
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