anyone know what these switches/units r for? - The 1947 - Present Chevrolet & GMC Truck Message Board Network



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anyone know what these switches/units r for?

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11-12-2011, 12:29 PM

#11

Desert1957

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Join Date: Apr 2009

Location: New Freedom Pa.

Posts: 1,335

Re: anyone know what these switches/units r for?

Quote:

Originally Posted by rs72z

Is it fuelinjected? I believe that the ecm needs it work properly.
Posted via Mobile Device

Without the "VSS" vehicle speed sensor , the ECM will run in open loop. Which means it takes no input from any other sensors, engine runs on fix preset parameters. Also the "Check Engine" light will stay on full time.

Desert

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