When I go to GM, then Chevy, then passenger vehicle, i get a whole bunch of letters, when letters are selected they contain different engines, but not my 3.4? Isn't there an easier way to select chevy vehicles? I'm using the MD802.
I am not familiar with your tool but that letter you looking for its the 5th digit of the vin number for trucks or the 4th for cars always on gm in your case will be the 5th i beleive equinox are L and its not a passenger car that will be under trucks in most tools but i don't know about yours good luck.