So here is my delima. I have this 74 Chev pickup with a 455 Olds, 4l80e trans and TBI. ECM# 16147060

I do not know what the VIN was on the original vehicle. I believe it was from a 91 Suburban with a 350.

I would like to pull the codes from this, as I believe I am not getting any timing advance. It overheats on steep long climbs when towing.