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front o2 sensors V rear
So I was checking The front o2 heater ckt for voltage and have power on the Green/White wire and the green as Ground . The pcm pins are 74 & 80. My thought was this should light a test light but I did not try. Being pcm. The rears are fused and Grounded. A... Login to read more. 
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| Engine | 6.0 L |
| Trans | 4-speed Automatic (Electronic) |
Vehicle Data
2001 Chevrolet Silverado 2500 HD LS 6.0L
| Engine | 6.0 L |
| Trans | 4-speed Automatic (Electronic) |
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