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Allison transmission acting up
After a tech installed cooler lines and had them come loose
on the owner, the trans was damaged due to loss of fluid. It
would not move in any forward gear, and after unplugging the
TCM it was still no go in drive, 3, 2 or low. 
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16 Replies Received
16 Replies Received
| Engine | 8.1 L |
| Trans | 5-speed Automatic (Electronic) |
Vehicle Data
2004 GMC Sierra 3500 SLT 8.1L
| Engine | 8.1 L |
| Trans | 5-speed Automatic (Electronic) |
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