Thanks for the reply! Yea i figured it would be easier to just get the Cobalt one, I only purchased the HHR one as it was newer so I was expecting it to be in better shape, they did have cobalt ones but were older and not as good looking. As far as performance i don't really have anything in mind i just want the car to run well as intended haha. By chance do you know where and how much it should cost to have the ECM re-calibrated?
For symptoms, shortly after we bought it i noticed a SERIOUS lack of power on first gear, we would be pressing on the pedal but all it would do is make the RPMs go up (to about 4-4500) till it finally changed gear. It wouldn't kick, make noise or anything it was just weird. After a while i couldn't ignore it anymore so i took to my dad as he does a lot of home repairs and is more knowledgeable than i am. He sugested i ground a wire with a nut and bolt to the TCM as apparently that is a common problem with both Cobalts and Malibus and it worked! for about a week... after, my fiance called me and said the car was struggling on the highway i asked her what RPMs she was running, she said 6... SO when i got home from work i drove it around, it felt normal, did the first change then when i got to 40 MPH it felt like something was pulling it back, also the rpms were going up and down between 2500 and 3000 and would not shift, i turned around as i didnt want to get to far and risk being stranded and it did the same thing when it hit 40. I finally decided to take it to a mechanic to see what could be done assuming it would just be replacing the TCM, 2 days later he tells me the tranny needs to be rebuilt.
Again thanks for your help!
Last edited by MannyFallout; 07-21-2016 at 09:00 PM.