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Voltage from pin 57
E38 ECM and TCM from a 2008 avalanche at pin 57 I have 10v w/ key on and it fluctuates between 3.4 and 5.3 when running I thought it should be 5v all the time any help would be great
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Hand made A/C vent manifolds for 64-66 trucks adapts any aftermarket A/C to OEM vent
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