Vortec to 0411 swap and info thread!

[Fast355]

Glad you got it sorted out. The swap is VERY easy---But, you have to get the pins in the right spots. How long did it take you? My record is 43 minutes without doing the 4 Trans Range Switch wires. Those 4 wires take the most time.

Jeff

Jeff,
Just FYI the swap worked out. The G-series has about 3-4 wires missing from your chart and I have one left over wire not mentioned. Everything seems to work fine without it???? Need to dig into the 97s wiring diagram a little more and try to figure it out someday, but at the moment it runs great on the slightly tweaked tune. Also found that a few of the wires had different colors from the truck, but I just moved them pin for pin since I know the PCMs are practically the same between the 1997 Truck and Vans. Initially I put a pin in the wrong spot that had me chasing my tail even worse due to the fact it was a different color on the Express than a Pickup. I had an ABS light and no first gear until I resolved it. I had C2 48 and C2 49 swapped. On the Express C1 15 was light green in color just like the 1-2 shift solenoid.

Not sure why you even need the external wires honestly????? My 97 Express 0411 swap runs fine without them and the previous 94 G20 TPI swap ran fine without them too. In HP Tuners all I had to do was go into the General tab under Systems and change the PRNDL equipped setting to NONE. The PCM uses the internal transmission range sensor and all is happy with the world. Let me relearn the crank and everything, although it ran fine without a crank relearn. I did not even bother with the canister pressure, just disabled it and the EGR. With the EVAP and EGR turned off in the tune, my scan tool shows all the readiness as READY. Will soon find out if the state machine will say differently. Will mention that I thought I was going to get away with not altering the EGR wiring since I had it turned off, fired it up and it ran like pooo, until it was above idle. Found it was the EGR, unplugged the valve for now. I do not plan on hooking it back up as I hate what it does to the inside of the intake.

Out of the box running Hypertech Spark and WOT fuel mapping for a 4.3 V6 it runs very well. I tweaked the transmission and removed the torque management from it as well as increased the line pressure. Shifts crisply now and keeps pulling through the gears.

Chris