My dads 1997 GMC 2wd since we got it made popping noise from the rear end. Well on the way to go fishing the other day from about 45-Till whenever he let off the gas it made this HARD vibration. I looked over at him and he said it had been doing that alot lately, Well it done it again on the way home. I just read about the Death Wobble GM's have. Do you yall think that is what we got going on here? Sorry I know this is a Titan forum but I was curious for all of you people who have owned GM vehicles.