/en/qa/tag/chev-silverado-3500-sl2v2-security-lamp-passlock2 Powered by Question2Answer /en/qa/47473/security-light-flashing-intermittent-no-start-when-cold Installed a prostart CT-3271, 2 button 1 way remote start,  in a 2003 Chev Silverado 3500 tow truck, gasoline, automatic with a SL2-V2 bypass. Used wiring schematic #4. Installation about 3 months ago. Customer says when in colder temps (-30C -block heater plugged in) attemps to remote start, truck will start, run for a few seconds and shut off. He then goes to truck to try and manually start but security light is on and truck will not start and run. He then leaves the truck sit for 10 mins and starts with key and truck runs normally.  Now while driving on highway today at constant speed says security light will come on intermittently but truck runs normal otherwise. Any ideas? Thanks, Mike. Chevrolet /en/qa/47473/security-light-flashing-intermittent-no-start-when-cold Fri, 06 Mar 2015 22:21:00 +0000