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Ask Gm Tech (Cam) Your Own Question
Gm Tech (Cam)
Gm Tech (Cam), GMC Mechanic
Category: GMC
Satisfied Customers: 1685
Experience:  GM Grand Master Technician 2007. 14 year experience.
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My Denali will not start due to the alarm. Battery amps are

Customer Question

My Denali will not start due to the alarm. Battery amps are good. I have tried diconnectin and reconnecting the battery. Still wont start .Its an Xl
JA: Have you checked the battery, particularly the terminal connections? Are they corroded?
Customer: No!
JA: What is the model/year of your GMC?
Customer: 2003. Yukon Denali Xl
JA: Are you fixing your Yukon Denali yourself? What have you tried so far?
Customer: Disconecting and reconectting the battery. And a jump start with cables
JA: Anything else you want the mechanic to know before I connect you?
Customer: No
Submitted: 9 months ago.
Category: GMC
Expert:  mike switzer replied 9 months ago.

by thealarm do you mean the security light? or does this vehicle have an aftermarket alarm installed?

Customer: replied 9 months ago.
No it does not have an After maket. Standard
Expert:  mike switzer replied 9 months ago.

okay so you are referring to the security light on the dash? does it crank ?

Customer: replied 9 months ago.
No my clusters need to be replace. So is know security light. But check engine light comes on.
Expert:  mike switzer replied 9 months ago.

so to reset the security you need to follow this procedure

turn the key to start like normal and then let the vehicle sit in the on position for 10 minutes. then off for 10 seconds.

repeat that procedure two more times. on the forth turn of the key the vehicle will start.

Customer: replied 9 months ago.
Already tried that
Expert:  Gm Tech (Cam) replied 9 months ago.

Hi there, I am Cam. Do you still need help?
If so, we need to get your cluster working to see the reaction from the security light. Performing the relearn blind may not be accurate.