Shot in the dark here. I've had an '04 GT1 for a few months, and she's tired (175K), but running OK. My biggest gripe is on the highway, flat or mild upward grade, and I want to build a liiiiittle speed, so I squeeeeze the gas pedal and then BAM, 5000 RPM in 2nd gear. Super annoying; my '02 Impala (3400, not 3800) didn't do that. Same behavior with cruise control trying to hold a grade.
Goofing off, I decided to see how far 2nd would go, so I went pedal to the 'wall, and I chickened out at an indicated 6500 RPM, somewhere around 95 MPH. As soon as I let off, it went into 4th like nothing bad just happened. At this age, she really doesn't need to spend as much time over 4000 RPM as she does.
I don't have any telemetry, just the gauges and my GPS apps. What the heck is going on here? Or is something not going on that's supposed to be?
