LQ9 auto to manual & general q's
06-29-2011, 12:49 PM
#1
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LQ9 auto to manual & general q's I'm kind of overwhelmed with the search feature.. so here goes...
I've got an lq9 with wiring harness and pcm from a 2005 escalade. I want to make this setup work with a T56. I'm sure many people have done this, if someone can guide me to those threads, I'd really appreciate it. I have a spare 98 manual harness that I can cut up to salvage the trans plugs.
Another thing I'm having a hard time finding info for is, what is the part # for the tac module and pedal assembly. My PCM has the service #: 12589463 and hdw #: 12589162. I need to know this information so I can pull off the right stuff when I'm at the junkyard. I don't want to convert to dbc since this pcm doesnt have the iac module in it.
I've got an lq9 with wiring harness and pcm from a 2005 escalade. I want to make this setup work with a T56. I'm sure many people have done this, if someone can guide me to those threads, I'd really appreciate it. I have a spare 98 manual harness that I can cut up to salvage the trans plugs.
Another thing I'm having a hard time finding info for is, what is the part # for the tac module and pedal assembly. My PCM has the service #: 12589463 and hdw #: 12589162. I need to know this information so I can pull off the right stuff when I'm at the junkyard. I don't want to convert to dbc since this pcm doesnt have the iac module in it.
06-29-2011, 01:16 PM
#2
Turns out a little more complex than I expected, and I'm on my second truck/manual trans swap.
I've got an 05 L59 (flex fuel 5.3) on a muncie in a 72 Olds 442. Same ecu as yours.
It's using the 12573059 tac, black plastic with metal mounting tabs. I've got a used one if you need it.
For the pedal, get a non-adjustable for an 03-05 GM truck, not the adjustable Escalade. Check the dealer, they're only about $100.
The VSS input should be programmed for the manual trans reluctor.
Disable all the auto trans stuff.
If you want to have cruise control, you'll need to add CPP and brake switches.
There's another issue with the tune. On my ecu that had an auto trans, the rpms tend to over rev when the gas pedal is dropped and the clutch engaged. On an ecu that came from manual trans truck, the rpm drops as soon as the clutch is engaged. Still working to figure that one out.
I've got an 05 L59 (flex fuel 5.3) on a muncie in a 72 Olds 442. Same ecu as yours.
It's using the 12573059 tac, black plastic with metal mounting tabs. I've got a used one if you need it.
For the pedal, get a non-adjustable for an 03-05 GM truck, not the adjustable Escalade. Check the dealer, they're only about $100.
The VSS input should be programmed for the manual trans reluctor.
Disable all the auto trans stuff.
If you want to have cruise control, you'll need to add CPP and brake switches.
There's another issue with the tune. On my ecu that had an auto trans, the rpms tend to over rev when the gas pedal is dropped and the clutch engaged. On an ecu that came from manual trans truck, the rpm drops as soon as the clutch is engaged. Still working to figure that one out.
06-29-2011, 02:05 PM
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Turns out a little more complex than I expected, and I'm on my second truck/manual trans swap.
I've got an 05 L59 (flex fuel 5.3) on a muncie in a 72 Olds 442. Same ecu as yours.
It's using the 12573059 tac, black plastic with metal mounting tabs. I've got a used one if you need it.
For the pedal, get a non-adjustable for an 03-05 GM truck, not the adjustable Escalade. Check the dealer, they're only about $100.
The VSS input should be programmed for the manual trans reluctor.
Disable all the auto trans stuff.
If you want to have cruise control, you'll need to add CPP and brake switches.
There's another issue with the tune. On my ecu that had an auto trans, the rpms tend to over rev when the gas pedal is dropped and the clutch engaged. On an ecu that came from manual trans truck, the rpm drops as soon as the clutch is engaged. Still working to figure that one out.
I've got an 05 L59 (flex fuel 5.3) on a muncie in a 72 Olds 442. Same ecu as yours.
It's using the 12573059 tac, black plastic with metal mounting tabs. I've got a used one if you need it.
For the pedal, get a non-adjustable for an 03-05 GM truck, not the adjustable Escalade. Check the dealer, they're only about $100.
The VSS input should be programmed for the manual trans reluctor.
Disable all the auto trans stuff.
If you want to have cruise control, you'll need to add CPP and brake switches.
There's another issue with the tune. On my ecu that had an auto trans, the rpms tend to over rev when the gas pedal is dropped and the clutch engaged. On an ecu that came from manual trans truck, the rpm drops as soon as the clutch is engaged. Still working to figure that one out.
06-29-2011, 02:38 PM
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Turns out a little more complex than I expected, and I'm on my second truck/manual trans swap.
I've got an 05 L59 (flex fuel 5.3) on a muncie in a 72 Olds 442. Same ecu as yours.
It's using the 12573059 tac, black plastic with metal mounting tabs. I've got a used one if you need it.
For the pedal, get a non-adjustable for an 03-05 GM truck, not the adjustable Escalade. Check the dealer, they're only about $100.
The VSS input should be programmed for the manual trans reluctor.
Disable all the auto trans stuff.
If you want to have cruise control, you'll need to add CPP and brake switches.
There's another issue with the tune. On my ecu that had an auto trans, the rpms tend to over rev when the gas pedal is dropped and the clutch engaged. On an ecu that came from manual trans truck, the rpm drops as soon as the clutch is engaged. Still working to figure that one out.
I've got an 05 L59 (flex fuel 5.3) on a muncie in a 72 Olds 442. Same ecu as yours.
It's using the 12573059 tac, black plastic with metal mounting tabs. I've got a used one if you need it.
For the pedal, get a non-adjustable for an 03-05 GM truck, not the adjustable Escalade. Check the dealer, they're only about $100.
The VSS input should be programmed for the manual trans reluctor.
Disable all the auto trans stuff.
If you want to have cruise control, you'll need to add CPP and brake switches.
There's another issue with the tune. On my ecu that had an auto trans, the rpms tend to over rev when the gas pedal is dropped and the clutch engaged. On an ecu that came from manual trans truck, the rpm drops as soon as the clutch is engaged. Still working to figure that one out.
why should i be using a non-adjustable pedal?
06-30-2011, 11:39 AM
#6
Leave the auto trans connector unplugged ziptied out of the way somewhere. VSS doesnt change. ISS for 4L80E harnesses gets left alone, unplugged. Find the reverse lock pin on the PCM and add one wire strait to the connector, then the other wire to 12v IGN
Thats it
07-01-2011, 01:11 PM
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Running two extra wires is too much work?
Leave the auto trans connector unplugged ziptied out of the way somewhere. VSS doesnt change. ISS for 4L80E harnesses gets left alone, unplugged. Find the reverse lock pin on the PCM and add one wire strait to the connector, then the other wire to 12v IGN
Thats it
Leave the auto trans connector unplugged ziptied out of the way somewhere. VSS doesnt change. ISS for 4L80E harnesses gets left alone, unplugged. Find the reverse lock pin on the PCM and add one wire strait to the connector, then the other wire to 12v IGN
Thats it
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