I set mine to 1.94 about a year ago, and cant believe it's the same truck. If I was you I would get the GMTD scan software and try it yourself. Yes, maybe it does rattle quite a bit when its REAL cold out, but with the software you can dial it back to were you will feel more comfortable if you prefer. Some members of the ''Page''have dialed it back to 1.50 to avoid that ''marbles in a can '' sound when you start it cold, but not me, I am addicted to the improved throtle response. Have you had the truck since it was new? One member has stated that the timing chain can stretch in as little as 60 or 80 thousand miles and should be replaced to keep it from running like a slug. I hope this has answered your question. Get back to us and let us know what you decided.
94 Chev Blazer, 6.5TD, 3.42, 4WD,Gear drive,,Remote FSD behind drivers headlight,,Mobil 1 in difs and trans,Rotella 30W, Over a quarter of a million miles !! Member -1.94 club.