2003 Grand Prix Pontiac having problems.?

  • Thread starter Thread starter Don
  • Start date Start date
D

Don

Guest
I believe its the ECU, but can't tell for sure. Its starts up a but as I drive the dash lights start flashing and the transmission goes into a lower gear. I have another ECU they told me it was compatible with this car came off a Buick 02, but do I have to reprogram it.
 
Back
Top