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2002 Chevrolet 2500HD 6.0, Compustar 7900AS


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nevada2500hd 
Member - Posts: 1
Member spacespace
Joined: December 15, 2020
Location: Nevada, United States
Posted: December 15, 2020 at 7:03 AM / IP Logged Link to Post Post Reply Quote nevada2500hd
Hey Guys / Gals ,
New member here....
I ordered and received a Compustar 7900AS for my 2002 Chevy Silverado 6.0 2500HD
Few questions:
1)What else do I need?
2)I’ve read about passlock bypass modules, but not sure which one to get???
3)Not sure if the passlock bypass gets wired to the factory harness then to compustar ?
4)Different wiring diagram for bypass itself? Or maybe plug and play option
Been a automotive mechanic for 15 years, I don’t mind wiring.
I just like to know what I’m doing before I start touching things.
Been looking at wiring diagrams for around 2 hours......was hoping for clarification for this alarm noob.
Thanks and Happy Holidays !
iskidoo 
Silver - Posts: 1,040
Silver spaceThis member has made a donation to the12volt.com. Click here for more info.spacespace
Joined: December 08, 2002
Location: Maine, United States
Posted: December 16, 2020 at 1:25 AM / IP Logged Link to Post Post Reply Quote iskidoo
Id start with this great pictorial guide from Kreg357 located here. https://www.the12volt.com/installbay/forum_posts.asp?tid=135786
Keep in mind that his first pic with the lock wires are + not - which he used the 451m for. Make sure you do not omit Ignition 2 (white) or you will have transmission issues. You could use the bypass he used which would connect to the data wire in the OBD2 connector or a Passlock-SL2 or GM-SL2 could be had on eBay for about $25 and should work fine for a bypass. Last 2 will require a few more wire connections. There are also newer options but some are overpriced because they cover newer systems too.
Steve G

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