E40 pin assignments after segment swap
07-29-2024, 09:14 PM
#1
E40 pin assignments after segment swap I'm planning the wiring for an upcoming Colorado build which necessitates using an E40 ECM (ugh)
It'll require a CTS-V operating system and various Trailblazer parts segment swapped in
My question relates to the physical pin assignments. Should the harness match the OS file or the segment?
EX: pedal assignments are totally different from CTS-V to TBSS
Or is this something I'll have to guess and check?
It'll require a CTS-V operating system and various Trailblazer parts segment swapped in
My question relates to the physical pin assignments. Should the harness match the OS file or the segment?
EX: pedal assignments are totally different from CTS-V to TBSS
Or is this something I'll have to guess and check?
07-29-2024, 11:23 PM
#2
I thought that Colorado swaps would use a 2006 Trailblazer SS E40 file. I think that the LS2 CTSV used the E67 computer as the later 07-09 TBSS did. The E67 only works with a 58x reluctor wheel.
07-30-2024, 09:18 AM
#3
05-06 CTS-V were still 24x and used the E40
For colorados, most of the tune is based on trailblazer
The main difference is cruise control. Colorados use a resistor ladder where trailblazers use a traditional 3 wire. CTS-V's use a resistor ladder style stalk. Since cruise input type isn't something that can be adjusted in HPT, the CTS-V OS is required
I think I may just use the TBSS E40 tune complete and modify the physical cruise stalk. Skip this CTS-V nonsense
Interesting thing about E40's I didn't know until knee deep in them. They're actually PCM's, not ECMs. Colorado 4/5 cyls run 4L60E controls through them without a T42. Only the V8 versions use an external T42 to control the same trans
For colorados, most of the tune is based on trailblazer
The main difference is cruise control. Colorados use a resistor ladder where trailblazers use a traditional 3 wire. CTS-V's use a resistor ladder style stalk. Since cruise input type isn't something that can be adjusted in HPT, the CTS-V OS is required
I think I may just use the TBSS E40 tune complete and modify the physical cruise stalk. Skip this CTS-V nonsense
Interesting thing about E40's I didn't know until knee deep in them. They're actually PCM's, not ECMs. Colorado 4/5 cyls run 4L60E controls through them without a T42. Only the V8 versions use an external T42 to control the same trans
07-31-2024, 12:35 AM
#4
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i to thought having cruse control working on my colorado swap was going to be great. after driving the truck and cruse not working like current performance alluded it would, i did not miss it as 500 hp is fun in these trucks. i have the Colorado v8 swap harness for sale. e40 ecm. t42 tcm, throttle pedal with bracket. programed to tbss. went holly.
Today, 07:42 AM
#5
Final follow up for this thread
Pinouts are locked to the base file used. Trailblazer, CTS-V etc. You cannot do a cruise control segment swap on HPT in 2024 like you can for example swap trans controls
As far as cruise, The one wire colorado cruise stalk is not compatible with trailblazer 3 wire cruise. I used external switches to solve, but there is no amount of computer tuning that will allow for this change
The same for manual colorados using a CTS-V tune. E40 CTSV's use a traditional 3 wire cruise where later E67 CTSVs use a 1 wire. The latter 1 wire is NOT compatible with the colorado stalk because the resistor values are different
Pinouts are locked to the base file used. Trailblazer, CTS-V etc. You cannot do a cruise control segment swap on HPT in 2024 like you can for example swap trans controls
As far as cruise, The one wire colorado cruise stalk is not compatible with trailblazer 3 wire cruise. I used external switches to solve, but there is no amount of computer tuning that will allow for this change
The same for manual colorados using a CTS-V tune. E40 CTSV's use a traditional 3 wire cruise where later E67 CTSVs use a 1 wire. The latter 1 wire is NOT compatible with the colorado stalk because the resistor values are different