Installing 06 Chevy E-fans on a 01 Chevy
#81
Here is some additional information that hopefully will clear up some issues in this thread:
1) Radiator size - this is the size of the core. 34" is what you definitely need to use the 05+ fans.
2) A radiator with oil cooler is no problem, just block off those passages in the radiator if you don't have an oil cooler. I have a radiator like this and although I have bought the oil lines/cooler, I have not installed them yet.
3) When using the factory harness, don't cut off the GT150 connector for the PCM leads. All you need is the female GT150 connector and some of your own wire to run to the PCM. Of course, if picking the harness at the junk yard, just make sure to take this complete connector. If you need the GT150 female side connector, I found one here with the terminals seals and lock. Delphi GT150 Series 2 Way Female Wiring Loom Connector
4) You can definitely use the factory harness and control the both fans through the PCM for 1999-2002 models. I believe GMCtrk has a 1999 and did this, nonnieselman did this with his 2000 and I have done this with my 2002
5) A cool little tool when working with connectors and terminals is this removal tool
6) Using the 05 fan settings as previously posted is a good way to go. However, I own an '02 and decided to go with 2002 Camaro fan settings and have had no issues whatsoever
7) Just to clear up any misconceptions about fan speed: the fans do not have separate speeds. A particular fan will at a particular RPM based on the voltage that is receives.
When both fans spin at "low speed", it is because they are in series, thru the use of the relays, and are receiving 6 volts each.
When a fan is at "high speed", it is because the fan is receiving a full 12 volts of power, because now the fans are in parallel mode.
_
1) Radiator size - this is the size of the core. 34" is what you definitely need to use the 05+ fans.
2) A radiator with oil cooler is no problem, just block off those passages in the radiator if you don't have an oil cooler. I have a radiator like this and although I have bought the oil lines/cooler, I have not installed them yet.
3) When using the factory harness, don't cut off the GT150 connector for the PCM leads. All you need is the female GT150 connector and some of your own wire to run to the PCM. Of course, if picking the harness at the junk yard, just make sure to take this complete connector. If you need the GT150 female side connector, I found one here with the terminals seals and lock. Delphi GT150 Series 2 Way Female Wiring Loom Connector
4) You can definitely use the factory harness and control the both fans through the PCM for 1999-2002 models. I believe GMCtrk has a 1999 and did this, nonnieselman did this with his 2000 and I have done this with my 2002
5) A cool little tool when working with connectors and terminals is this removal tool
6) Using the 05 fan settings as previously posted is a good way to go. However, I own an '02 and decided to go with 2002 Camaro fan settings and have had no issues whatsoever
7) Just to clear up any misconceptions about fan speed: the fans do not have separate speeds. A particular fan will at a particular RPM based on the voltage that is receives.
When both fans spin at "low speed", it is because they are in series, thru the use of the relays, and are receiving 6 volts each.
When a fan is at "high speed", it is because the fan is receiving a full 12 volts of power, because now the fans are in parallel mode.
_
#83
Just read your post earlier in the thread. Thanks. Does the fan turning on replace the need for auto recirculation? Do i just cut the wire and run it to fan 2 relay and have the shop program it so pin 33 is fan 2 control instead?
#84
TECH Addict
iTrader: (6)
It does not replace the need for auto recirculation. The pin can be used for auto recirculation OR Fan #2 trigger control.
When you cut that, or remove it from pin33, your auto recirculation will no longer work. That is OK.
Once that is done, insert your fan trigger wire into pin 33 (or splice to the pin 33 wire that was cut). Your tune will need to be changed as such:
When you cut that, or remove it from pin33, your auto recirculation will no longer work. That is OK.
Once that is done, insert your fan trigger wire into pin 33 (or splice to the pin 33 wire that was cut). Your tune will need to be changed as such:
Last edited by SnakeOiler; 03-03-2024 at 05:06 PM.
#86
Electric fans
I have done this same swap on my truck. The question I have for you is about the operation of the fans running. Do the fans run as soon as the engine is turned on? My fans come on as soon as the engine starts and stay on low speed then high when a/c is on, is this normal?
#87
I have done this same swap on my truck. The question I have for you is about the operation of the fans running. Do the fans run as soon as the engine is turned on? My fans come on as soon as the engine starts and stay on low speed then high when a/c is on, is this normal?
#88
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Very good write up. I do have a question, is there anyway to wire up the fans and have them work as designed without having my computer sent off to be tuned? I have an 04 Sierra. I have been looking at the thermostat controlled harnesses on amazon and want to know what everyone thinks.
#90
Very good write up. I do have a question, is there anyway to wire up the fans and have them work as designed without having my computer sent off to be tuned? I have an 04 Sierra. I have been looking at the thermostat controlled harnesses on amazon and want to know what everyone thinks.