This is 100% opinion here, not backed up by any facts. Flame suit on.....
1-The first generation RL received a minor tweaking with the 2009 model year, IMHO anything after 2009 would be more desirable.
2-Based on post to the ROC, it seems to me that there were more fit and finish issues with the last two years of production 2013 and 2014.
3-I have a 2012 that had a oil leak from a main bearing bolt when new, that was corrected and I have had zero issues or problems with the truck since.
So, If I were shopping for a G1, I would only consider 2009 to 2014 with a slight preference for the middle years 2011 & 2012.
1-The first generation RL received a minor tweaking with the 2009 model year, IMHO anything after 2009 would be more desirable.
2-Based on post to the ROC, it seems to me that there were more fit and finish issues with the last two years of production 2013 and 2014.
3-I have a 2012 that had a oil leak from a main bearing bolt when new, that was corrected and I have had zero issues or problems with the truck since.
So, If I were shopping for a G1, I would only consider 2009 to 2014 with a slight preference for the middle years 2011 & 2012.