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Russell · 07-25-2005, 05:37 PM

That is your VSS (Vehicle Speed Sensor) The truck uses the signal it produces (2 pulses per speedometer cable revolution) to tell both the ECM how fast you are going (ECM = Electronic Control Module, basically the computer in the truck, ECM will be found on feedback carbed trucks, and is that silver box behind your glove box) and in some cases, is used for running the cruise control setup (not 100% sure about the 82-86 trucks, they may have a transducer style cruise setup yet...)

07-25-2005, 05:37 PM	#3
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	That is your VSS (Vehicle Speed Sensor) The truck uses the signal it produces (2 pulses per speedometer cable revolution) to tell both the ECM how fast you are going (ECM = Electronic Control Module, basically the computer in the truck, ECM will be found on feedback carbed trucks, and is that silver box behind your glove box) and in some cases, is used for running the cruise control setup (not 100% sure about the 82-86 trucks, they may have a transducer style cruise setup yet...) __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) Last edited by Russell; 07-25-2005 at 05:38 PM.