Lots of Stuff wrote:
Your questions are valid and yes spending 5000 dollars on a unneeded repair is crazy.
My truck started smoking at idle some time ago. We have tried to ignore it for maybe the last year.
We have monitored the crankcase oil level since the truck was new. Understanding bad injectors can cause an overfill condition. That has never happened to my truck.
The smoke at idle was becoming very noticeable. Not black smoke buts lots of blue/white smoke.
Wife complained about it a lot.
When I drove the truck into the dealers service department several employes remarked about my smoker.
The dealer wanted $100 as I remember to test the truck to find the smoking problem.
Later that day the dealer reported three injectors bad and possibly a forth. I do not know what kind of test if any was done.
The repair receipt DID NOT show the $100 test fee. Just parts and labor for the repair.
After the repair at idle the truck has no noticeable smoke. Believe me the wife didn't until she looked for herself.
It also seems to run better with more power but I am less sure of that. It also seems slightly noisier, but we have been driving the wife's car and so that maybe why.
We have used this same dealer for many repairs and services on our two Chevy's over the last 5 years. The service has been very competent though a bit expensive. We have never even thought of asking to see old parts because the repairs fixed problems.
Not ofended in the least. In the big scheme of things car problems are small problems.
Oh yeah the rebuilt injectors cost $300 each.