3 Attachment(s)
2000 Silverado Harness question- Canada vs US built trucks
I am doing an engine swap (2004 LM4 5.3 from an Envoy) in my '98 Durango. I'm using a harness I had on hand from a 2003+ (Blue/Green) truck and converting it. The PCM will be from a 2000-02 Silverado. I have run into a sensor ground issue involving the engine coolant sensor.
In wiring the harness, I see there is a difference between US and Canada built trucks in both the O2 sensors and the coolant temp sensor.
The US built trucks use a flat 4-pin connector for the O2 sensors (case grounded) whereas the Canadian built trucks use a 4-pin square connector, the same one that is on my harness (isolated grounds). I was OK with that since I identified the functions and with advice from www.lt1swap.com was able to figure out how to wire up my O2 sensors. In relevant summary, they all use pin C1-63 for the "low reference" ground.
Now I'm looking to wire the coolant sensor and the diagram shows US and Canadian versions here as well. Both use pin C1-74 for the 5V out to the sensor. The US version uses pin C1-63 for the sensor ground (same one as the O2 sensors above), while the Canadian versions use pin C1-41.
My concern here is since I downloaded a stock tune for a 2000 Silverado (with 5.3 and 4L80 segment swap since that is my powertrain combo, I'll attach it) there may be an issue in the coolant temp and/or O2 sensor wiring. If the file is from a US built truck, won't it expect the wiring to be US spec? If I can find a file for a truck built in Canada, I think I should be OK. Is there a way to check a file and see if the VIN is from a Canada built truck?
I'll attach some relevant schematics. The O2 schematic is for the Canada built trucks, while the ECT is for both.
Attachment 102375Attachment 102376
Attachment 102377
