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2003 GMC C4500 Topkick C4C042 6.6L Speedo
The complaint is after replacing Alternator the speedo reads too fast. The truck will only go 45 mph because the speedo is reading 85 mph and the PCM cuts out the fuel. From what I can gather because it has an Allison trans the system gets the signal from the ...
FIX posted 9/18/2006
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Message Closed w/FIX
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6 Replies Received
6 Replies Received
Related Documents & Media | VIN | 1GDE4E1143 |
| Engine | 6.6 L / 8 cyl / DIESEL |
| Trans | 0-speed Automatic |
| Delivery | FI |
| Affected | Speedo |
| Conditions | Reads Too High |
Message Closed w/FIX
Vehicle Data
2003 GMC C4500 Topkick C4C042
| VIN | 1GDE4E1143 |
| Engine | 6.6 L / 8 cyl / DIESEL |
| Trans | 0-speed Automatic |
| Delivery | FI |
| Affected | Speedo |
| Conditions | Reads Too High |
Video