tailgate alignment-wiper hangs
 

02 ZR2. My tailgate is low on one side causing the rear wiper to get stuck between the glass and the gate. I have also noticed two co-workers have four door blazers and their rear glass has trim around it where mine does not. The right side is down about 1/4 of an inch lower than the left but does not seem to be loose in any manner even though it sounds like it rattles (tire carrier removed). large gap at the top of the glass at roof 1-1/4 of an inch. Maybe wrong glass? Is this a known issue? can the gate be adjusted?