I just bought an 05 trailblazer. Check engine light was in when I bought it throwing codes for replacing solenoids. I replaced all the solenoids to no avail.
Still showing the same codes listed below
P0740
P0753
P0756
P0758
P1810
P0014
Thought it might be a faulty ignition switch but once again still the same codes
I now only have 2nd and 3rd gear and the truck randomly dies if your at a stop for any length of time. Transmission shop is stumped the mechanic is stumped. Please help!!!!!

 

My brother who is a mechanic, says it might be a loose ground wire, I have checked my front one, but i cannot find the rear one.

 

Did you replace the transmission wire harness (The one inside the trans pan)? All these codes except for P0014 point to parts controlled by the transmission wire harness. Could be a harness issue. Connector issue. I'd trace the harness back to the fuse panel. Check the fuses.


Could be a bad TCM. May need to reseat the PCM connector.