Hey guys
I opened up the remote key fob to find the battery number and when I went to put it back together there is no indication of polarity on the case or the circut board the battery slides into
I've seen many youtube video's on the three button fobs but none on the 6 button ones

Many thanks in advance on any help in getting the fob to work

 

The new ones have 6 buttons? Pictures might help?

 

Sorry..
The optional 200 series OEM remote start/alarm/range extender was installed by the dealer when new
Finally got the fob to work by trial and error, needed to get both CR2016 3v batteries stacked (6volts) in series and in the correct polarity to get the truck to respond, did't cure the problem with the auto start so that's the next problem to troubleshoot
Speaking of, when I attempt to use it works up to the point of starting then it chirps once, all the warning lights are lit, the alarm icon is rapid flashing but no joy after that, have to disable it by pressing the auto start buttion again then using the unlock button