Greetings,
I took my trailblazer to the dealers to get a few things straightened out, The back panel around the license plate rubber gasket was pulled in, probably installed too tight. they installed a new seal, problem taken care of. I also told them of an engine knock, sounds bad sometimes on startup, sometimes no knocking at all, of course, when I took it to the dealer it would not knock for them, they told me that they reprogrammed the power train controller module. I got in and started it up, knocking was loud, drove it around to the service entrance and, sure enough, they heard it. Glad that they heard it, funny how problems disappear when at the shop. Had to make a new appointment, said that it was possible piston ring slap. I use Mobil
1 oil and was wondering if it could be oil related. They are a great bunch of guys at the dealership, however, I hate to see them tear into the engine if they do not need to, it has only 33,000 miles on it. I was wondering if there are any TBA's out for this sort of knocking problem. It sounds like a collapsed lifter noise, it starts knocking as soon as the engine starts, doesn't have to be in gear. Could it be a failing injector?As always thanks in advance,
Markus