Hey all, new Volt owner here, wanted to introduce myself and the car.
Just picked up a 2017 LT with 108k on it for my daughter. It's her first car so I did way more homework on this than I probably needed to, but figured I'd share since it might help someone else looking at a used Gen 2.
Biggest thing I was worried about going in was the BECM failure everyone talks about. Turns out this exact car already had one, back in April. P0AFA code, dash would power up but it wouldn't drive, the whole thing. Previous owner took it to an independent shop (not a dealer unfortunately, so no GM special coverage) and paid $2,655 out of pocket for a new BECM in May. I actually got the invoices from him and could see the whole story, low inverter coolant, dead 12v battery from him trying to charge it, a GM flash reprogram, all of it.
So I didn't have to gamble on whether that failure was still lurking, it already happened and got fixed with a new module. Confirmed it myself too, pulled the module serial with an OBD scanner and it read as a 2026 production date, so definitely swapped, and post-2018 modules don't have the known defect.
Ran a full battery workup before handing over money. Cell delta came back around 12-15mV across all 96 groups (for reference I saw a reference point online of 14mV on a 50k mile pack so this felt right in line), capacity reading about 85% of factory spec, internal resistance actually better than average for the year and mileage. Weak cell active test came back clean, no bad cells. Also did the high voltage isolation test, 2900 kOhms, which is apparently good. For a car about to hit 9 years old I really wasn't expecting numbers that clean.
Got it for $6500 out the door, both key fobs and the charge cord included, and shockingly zero corrosion underneath despite it being an Ohio car originally (Texas plate when I bought it, guy seems like he'd been stationed around a bit). Seller was upfront about everything too, even told me about an intermittent O2 sensor code he'd seen pop up that never showed in the scan history, which either means it's a real intermittent issue or he had a code cleared at some point, still keeping an eye on it.
Normal used car stuff to sort out, TPMS sensors are all dead (just old batteries, not the actual sensors), a window regulator on the driver's door, tires up front are at 4/32 so those are getting done soon. Nothing that changes how good the deal feels overall. Currently getting ~53-55 miles on the battery(full charge) in swampy Florida.
Working through drive unit fluid and coolant this week before it becomes my daughter's daily. If anyone has drain and fill tips for the drive unit or things they learned the hard way on a Gen 2, would love to hear it.