/en/qa/tag/ultrastart-1280 Powered by Question2Answer /en/qa/11373/why-does-my-int-sl-not-turn-on-the-rear-defrost-in-my-2008-trailblazer I installed a INT-SL+ into my trailblazer along with a Ultrastart 1280pro remote start unit connected via data wire.  All works fine except that the INT-SL+ will not turn on my rear defrost automatically when remote started.  The vehicle fitment chart says it will turn on rear defrost when the engine temp is 0C or below...   it's been -10F most of the week but my rear defrost has never automatically turned on?  did I miss something? Chevrolet /en/qa/11373/why-does-my-int-sl-not-turn-on-the-rear-defrost-in-my-2008-trailblazer Fri, 24 Jan 2014 11:16:10 +0000