Re: MPG, smaller engines take a hit when they're pushed a lot. Suggest softer throttle and slower speeds. I have a 2025 RS and get 29 MPG in cold weather. I picked it up in the summer and it was getting 30+. Another suggestion is check to see if the trans is getting into 8th gear, which slows...
Noise problem solved. GM had an update to correct programming in the ANC (Active Noise Cancellation). The excess howling in very cold weather is gone. Took about an hour. Re; not shifting into 8th gear. Received a technical bulletin indicating customers may raise the issue of not shifting into...
Hi there. Suggest you take it to the dealer. There's a service tech bulletin regarding that type of sound. It involves the noise cancelation system and positioning of the four microphones in the head liner. Apparently some were not seated properly.
I did the shift count thing. Never went beyond 6 shifts. The other thing is when using the paddle shift the gears are posted on the display. It will show its in 8th but it's not. I've been able to get it in 8th with the paddle and it does just fine but if it down shifts that's it. It will just...
Anyone note that their 2025 RS with 8 speed will not shift to 8th gear? Mine will once and a while if I use the paddle shift mode. Most of the time the display shows I've selected 8th but the transmission never shifts to 8th gear. In D (Drive) it will stay in 7th gear, 2200 RPM at 70 mph. In 8th...
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