where is the wire for the knock sensor routed to or at ona 1990 C3500 Chevy dually

60

Asked by Nov 15, 2014 at 04:24 PM about the 1990 Chevrolet C/K 3500 Extended Cab LB RWD

Question type: Maintenance & Repair

I have 1990 C3500 Chevy 454 TBI That I purchased used, I have done some repairs to it and all is well runs great but the engine  light keeps coming on, I checked it with a OBD and it gives the code for the knock sensor which I have purchased along with the wire connector but I cant locate the original connector wire the trace in the repair manual said it goes to B15 on the ECM but that is on the 1994 model not the 1990?? are they the same? I don't want to fry the system

1 Answer

60

I just found this site loads of info, my trucks knock sensor hooks to the spark control mod check the site out CHEVYTHUNDER.COM

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