My bone stock '04.5 LLY with 24K miles has recently developed a miss at idle when you are stopped at a light before the engine is fully warmed up. Once warm, the miss goes away. Also have noticed a stronger exhaust smell across the board. Oil level is not increasing. Fuel and air filters have @ 9K miles on them. Never been reflashed. Beginings of injector problems?

My bone stock '04.5 LLY with 24K miles has recently developed a miss at idle when you are stopped at a light before the engine is fully warmed up. Once warm, the miss goes away. Also have noticed a stronger exhaust smell across the board. Oil level is not increasing. Fuel and air filters have @ 9K miles on them. Never been reflashed. Beginings of injector problems?

Described my problem exacly. I have been reflashed for this problem. It went away for a couple of months and has resurfaced.

Sounds like the same problem I had with my 04.5 LLY. Took the truck in, had the reflash done, didn't help, took it back in a couple weeks later and had an injector that was going crazy, the balance rate was WAY out of spec, according to the tech I talked too, dealership replaced the injector, no problems since. Mine happened with about 16000 miles on the truck. Almost 25000 on her now and still running like a champ.

I had the same thing happen on the 04.5 LLY I had. Replaced the fuel filter and all was well.

Bert