Thank you for the donation.
It should not be the fault of the ECM and replacing it might not work.
Computer needs to relearn and sometimes it does not get to ready mode because certain conditions are not met. Quite often you need to let the computer do the initial relearn correctly.
Try the following and see if it helps.
Place transmission in Neutral position.
Ensure emergency brake has been set and all accessories are turned off.
Start engine and bring to normal operating temperature.
Allow vehicle to idle in Neutral for one minute.
Turn AC on and allow to idle for 5 mins.
Initial relearn is complete, and process will be completed during normal driving.
Driving vehicle would be required for other relearn procedures to be completed. Try to drive without harsh and abrupt accelerator or braking motions.
Saturday, June 13th, 2009 AT 2:48 PM