1998 gmc envoy

im installing a tecvox TC-4182 security system   ive never heard of this system but from the diagram i dont see a FAD wire and the truck has a factory alarm is there another way of shutting down the factory alarm Has anyone heard of this system before ??If i Can't Install it    I Don't need it   Joe

never heard of it. look in the manual and see if the unit can be programmed to unlock-start-lock. if so then you wont require the disarm wire.

Wher did you buy this?  is there another brand name and/or model name/number on the box?  i looked on the net for it and found nothing at all... 

its prob an ebay unit? if so i would suggest you stay away from those. you might find yourself wasting more time diagnosing issues, rather then installation time.Ted

2nd Year Tier 1 Medical School

Still installing as a hobby...pays for groceries

Compustar Expert

thanks for the replays guys i managed to talk the guy out of using the system and im installing a avital 4103 and the relay resistor method for the bypass that system i think was an ebay unit its crap the programming is a bunch of jumpers inside the module and from what i can tell it will only keep the car running for 5 mins and that is it there was no other mention of run timesIf i Can't Install it    I Don't need it   Joe

glad to help. most times, if you never heard of it before, its an ebay unit that will give you hell after. it works, doesnt work, cant program it etc. a DEI product is much more reliable as you are installing. As for bypass, relay/resistor methods work, but with the chaning temp, sometimes it throws the resistance off to the point the car wont start. Try looking for a data type bypass, more tolerance to cold/hot weather. If you still decide to cut costs and use a relay/resistor, make sure you try to achiev the resistance closest to the reading from the DMMTed

2nd Year Tier 1 Medical School

Still installing as a hobby...pays for groceries

Compustar Expert

Ive done the relay resistor method before on some saturn ions and some other gms and so far so good i just finished the install on the envoy. Used the relay reisitor method.    Ive tried using different passlock modules and they have failed on me in the past. I think they were astroflex modules.   They would work for a day or 2 then stop reprogram and work for a day or so then fail thats when i started using the relay resistorIf i Can't Install it    I Don't need it   Joe