I have a 2002 with 231k on the clock. Recently had a debuilt jasper trans put in and did a new injection pump a while back. The injectors were replaced aroubd 115k before i bought it. The other day i was at a red light and i had a white haze coming from the exhaust. Strong enough to burn my eyes so i figured it had to be fuel. My buddy plugged it in to check rates all were decent #2 #4 were alittle off but still “good” as per GM spec. The smoke only comes once the truck is up to operating temp. Runs like a top, power is there, no change in fuel economy, no white smoke when driving. I just dont want to dump the money into injectors if its something else i can look at before that. Thanks guys