Speed Control Springs problems of the 2004 Chevrolet Malibu

The vehicle continually goes into "engine low power mode" while on the highways. This is now occurring daily. I've tried to get it fixed but no one seems to know what it is. I am very fortunate that no one has hit me when the vehicle goes from high speeds down to 20 miles per hour with no response by pressing the gas pedal. There have been multiple things failing on this car: passenger side window no longer opens, cruise control will not work, 2 of the 3 chargers in the car do not work (after fixing those fuses, they just blew immediately) power locks went from barely working to not working at all, the latest being the low power mode and traction control being activated in the heat of a tennessee spring (already 80 degrees) - it's not a water issue. The first few months I had this car it was in the shop almost every weekend. I've gotten all the recalls fixed when they required it and I keep up with maintenance on this car. It has the usual break downs but this is the least safe car I have ever driven (and I have driven around twenty long term, ten more short term).