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Cruise Control Inop
The VSS signal from the PCM is missing. The VSS signal is getting to the PCM and the PCM is supplying the square wave signals at PCM pins#4 and #15 but not #3. The voltage level at pin #3 is 9 Volts unless I unplug the EVO/Passlock module, then it drops to 5 v... Login to read more. 
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| Engine | 5.7 L |
| Trans | 4-speed Automatic (Electronic) |
Vehicle Data
1999 Chevrolet Tahoe 5.7L
| Engine | 5.7 L |
| Trans | 4-speed Automatic (Electronic) |
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