If you live in any urban jungle, you have to be very careful with single button remotes. What happens is the 'bad guys' hang around in the huge parking lots (usually at malls) and have a neat little unit that can record the signal as you lock your truck with the remote. They simply wait for you to leave and then send out a duplicate signal from their hand held 'copier' that opens your doors and turns off the alarm. The OE units are dual signal I believe with a different signal setting your alarm from the one that turns it off. The 'copiers' can't open your door because they don't get your second signal until you return to drive away. Even the dual signal units aren't foolproof as the crooks simply log your signals and wait for you to come back in a week or so. There is so much theft now in the Pacific Northwest that you have to go to a secondary protection system to thwart these buggers. One of the best systems is a separate hidden fuel pump switch. On older carbed trucks a manual fuel shutoff works best (available from Napa Parts) because there is usually just enough fuel in the carb floatbowl to let the thief drive for 30 seconds and then the engine stalls. From what I've read, the thief always just abandons the vehicle in this situation. So.... get an OE remote and install some other 'immobilizer' as well - you might even be eligible for an insurance discount.
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