Needs some help! I bought it new and has been smoking for the last 30,000 miles and getting worse. White and blue smoke. Doesn't use a drop of oil. Gas mileage is down a couple of miles. Took it two dealers and they said they were not sure what was wrong with it. I think they dont know what they are doing really. Asked if they checked the pressure on the injectors and they just kind of looked at me funny. Everything on it is stock. Can you guys tell me what I need to do.

03 GMC Sierra-170,000 miles

Thanks,

Sounds like injecters going south, Smoke at idle or all the time? Find another dealer if possible, 170,000 on lb7 injecters your doing good.

It smokes when at idle and running.

Ryan B

Same thing mine did and had to replace injectors. Truck is an 04 and had 172000 miles on it.

I just had my injectors replaced under GM's special warranty. (7 years/200,000 miles, regardless of owner.) Make sure you check it ASAP. Mine is also an '03, but it was bought in October of '02. The clock starts ticking when it leaves the dealership. I made it by a month.

Good luck.

Mine is also doing that but only at idle. Stealer said it was injectors and because of mods they will not swap:mad:. I did remove the banks unit but left the intake and exhaust. I need some help on this or i'm screwed. I can't afford to pay full price-:tso i have been smokin people out at every stop light. How long can i run like this before total ka-puts?