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Ask Doctor D Your Own Question
Doctor D
Doctor D, Auto Service Technician
Category: Chevy
Satisfied Customers: 763
Experience:  ASE Master , 20 Years Experience
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No crank b1440 current code security light on in radio no

Customer Question

No crank b1440 current code security light on in radio no output to crank wire from ignition switch new switch knowing it wasnt it suspect theft deterrent in ignition housing
JA: Does the light flash, blink or stay solid? Have you tried to reset the security system?
Customer: Blink until key in run position
JA: What is the model/year of your Chevy?
Customer: 03 GMC SIERRA 5.3 4wd automatic
JA: Are you fixing your Sierra yourself? What have you tried so far?
Customer: New ign switch i am a certified master tech with GM for 20 years experience but have been out since 2004
JA: Anything else you want the mechanic to know before I connect you?
Customer: No
Submitted: 4 months ago.
Category: Chevy
Expert:  Doctor D replied 4 months ago.

Something is messed up in the ign switch output. retrace your repair and follow the attached trouble trees

Expert:  Doctor D replied 4 months ago.

electric diag attached

Expert:  Doctor D replied 4 months ago.

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