[C15_Sierra]

Here's a clip with the exhaust ON...that blowing noise is my brake booster...getting replaced later this week


Not a cold start, because I was topping off the coolant and filling the trans earlier, and took it for a little spin. Couldn't seem to get out of first gear, and I still am throwing a bunch of transmission codes. I have to diagnose to see if it's a wiring issue (which it sounds like it is). I don't think it ever got out of first gear...thank goodness for 2.73's!