I have a 2004 Silverado with the LS package (power windows, mirrors and locks) and I am going to install my alarm. I can't seem to get a straight answer on weather I need an interface module for the door locks or not. Some sites say I do, Some say I don't. Any help would be great. Thanks.

 

i believe u can just get away with wiring up relays on the advanced models but i think in work trucks you can get away with no interface & no relays not 100% on that though

 

I see. I read on the12volt.com, that the '' base model '' trucks don't require the interface. I can't find anyone willing to help me. Everyone I call just say bring it in so we can look at it... ugh.

If I wired it up with relays, how would I do that?

 

I highly recommend getting the interface module, it will make the install way easier! Once you spend the time/money wiring up the relays you could have been done with the whole install.

 

You have to get the interface the door locks are databussed. It also arms and disarms the factory alarm at the same time to prevent having problems while using your viper.

 

just go with the interface otherwise you're spending more time wiring up (2) 5-wire relays on each side and it's a shitload of xtra wire to run

 

I was doing some mor research. And I don't think I need the module or any other relays. I am just looking over the wiring diagrams for my truck and trying to figure it out. I don't have a factory alarm and I am not doing remote start so I don't see why I would need the interface.

 

The door locks are databussed is what makes the module necesary. I've installed alarms in bunches of these trucks if you want to hack it up don't use a module. If you want it to work seamlessly use a module.

 

Alright.. What modules have you used. I cant seem to find any more information online and everyone I call wont tell me anything over the phone. My installation booklet says there are diagrams for multiplexed door lock systems. I need help figuring this out....

 

Anyone...?