Of_The_Sun93
Newbie
Hey guys, i have a 97 Tahoe i swapped an NV4500 into from a 4L60. Since the swap, it's had horrible fuel mileage, and runs 30° advanced at idol with no codes. I've replaced every possible sensor i could to no sucess. I came to the conclusion that the auto ECU has a different running mode for actual driving, rather than being in just neutral on the selector switch all the time. Long story short, i got a 98 engine harness and ECU from a manual trans truck, and I'm swapping it into my Tahoe. Im having issues with both the plugs on the firewalls, i can't seem to find the pinouts for them. Anyone have those?
