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2001 GMC Sierra 2500 HD SL 6.6L Downshift
Ok to anyone with Allison experience. Truck has a very delayed downshift when you come to a stop. If you stop and try to accel right away it will free rev then slam into first. If you come to a stop and sit for about 20 sec you can actually feel the trans down...
FIX posted 12/23/2014
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Related Documents & Media | VIN | 1GTHK23161 |
| Engine | 6.6 L / 8 cyl / DIESEL |
| Trans | 5-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Affected | Downshift |
| Conditions | Delayed Downshift to First |
Message Closed w/FIX
Vehicle Data
2001 GMC Sierra 2500 HD SL
| VIN | 1GTHK23161 |
| Engine | 6.6 L / 8 cyl / DIESEL |
| Trans | 5-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Affected | Downshift |
| Conditions | Delayed Downshift to First |
Video