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No crank no start everything comes on battery alternator…

Customer Question
No crank no start...

No crank no start everything comes on battery alternator starter is fine acts like it's the anti theft

Mechanic's Assistant: When you turn the key, do you get a single loud click, or a series of rapid ones?

No

Mechanic's Assistant: What is the model/year of your GMC?

2004

Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far?

Yes tested battery and alternator

Submitted: 1 year ago.Category: GMC
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Answered in 4 minutes by:
1/23/2017
GMC Mechanic: Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems replied 1 year ago
Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: GMC
Satisfied Customers: 5,626
Experience: Owner at Carolina Auto Service &Sales , 20 years Experience in Foreign & Domestic vehicles
Verified

Hi, I'm Chad. Welcome to JustAnswer. I'm reviewing your question and I will be posting your reply ASAP.

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GMC Mechanic: Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems replied 1 year ago

you will need a factory scanner or equivalent to run a diagnostic scan & retrieve fault codes from the alarm module in the vehicle.
is it the module, the receiver, hood switch , door switch, wiring etc.. , it could be number of reasons & there is not a fuse or a relay that you can pull out to disconnect it unfortunately

But try this below

Master reset Procedure

1- Disconect Battery Cables ( Negative & Positive Cables )you can use any electrical wire as an extension if battery cables don't reach .

2- Hold cables Together for 60 secs ,then let go

3- Wait 15 minutes

4- Make sure all doors are closed

5- Reconnect battery Cables

6- Lock & unlock the vehicles using the key from driver door side (if you have a key fob with no blade key, just lock & unlock using the key fob buttons)

7- Enter the vehicle and attempt to start

Please let me know

Thank You

Chad Farhat

ASE Certified Technician

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Customer reply replied 1 year ago
I did that already and it started up, trying to figure out why that fixed it and allowed it to start. Not sure why?
Customer reply replied 1 year ago
That's why I thought maybe it was something wrong with the anti theft controls
GMC Mechanic: Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems replied 1 year ago

The hood switch & Key fob losing sync is a common issue , but there so many parts involved you need to scan it or it will be a pure guess so you can narrow it down .

do you have 1 or 2 keys for it

The hood switch , key losing sync & BCM module behind driver seat are common issues but we have way more parts involved .

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Customer reply replied 1 year ago
Just one key
GMC Mechanic: Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems replied 1 year ago

Get it scanned & we will know

If you get some fault code you can post them back here for me and I can help you further on it

Please let me know

Thank You

Chad Farhat

ASE Certified Technician

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