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1989 GMC C3500 Sierra, ECM/Inputs/Outputs waveform
GMC 89 Truck VSS Signals Seen at about 50mph, Both Good And Bad
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| Engine | 7.4 L / 8 cyl / GAS |
| Trans | 3-speed AutomaticTransmission |
| Delivery | Fuel Injection |
| Subsystem | ECM/Inputs/Outputs |
| Component | |
| Condition | Known Good |
Vehicle Data
1989 GMC C3500 Sierra 7.4L
| Engine | 7.4 L / 8 cyl / GAS |
| Trans | 3-speed AutomaticTransmission |
| Delivery | Fuel Injection |
| Subsystem | ECM/Inputs/Outputs |
| Component | |
| Condition | Known Good |
Video