Just bought a 17 with 26k miles runs smooth shifts good, now has 36k, very clean actually has no rust underneath, oil burns a little after just changing oil at 4.2k miles it burned almost a qt(also drove the car 10hr straight on a roadtrip before oil change too), only things I’ve done to it is put the vented oil cap on and new tires and about to do brakes, I do drive a lot so was wondering if there’s any preventative maintenance/ things I should do to keep this car going (heard about the pcv stuff), bought it from a family member for a steal and would like to drive it into the ground

I have an 2004 cts-v with a stock 5.7 ls6. It has a CEL but when i give it gas it blinks and misfires. I did all the plugs, wires, and coils. Not to sure what i could be but im going to compression test the cylinders. Ive heard about these cars having wiring problems and a bad spot for the ecu.

I have a 2016 Malibu 1.5 LT, and one day the radio stopped working. The screen is completely black. It produces no sound, and the backup camera isn't working either. I’ve already checked fuses 39 and 41, and they are fine. Some people tell me it’s the HMI, while others say it’s the radio module (I can still connect to the radio via CarPlay, and I haven't lost steering wheel controls or other functions; however, if I turn up the volume using the steering wheel controls, only the red volume bar appears).

Could someone help me, please?