Enable Class 2 Serial Data for Oil Pressure on 99-02 PCM

[JHPerformance]

Doing a conversion were I am trying to convert an 02 DBW 6.0 into an 06 Silverado originally 4.3l. The 06 uses serial data for the cluster oil pressure, I can wire in a 3 wire sending unit, but I am curious if I can enable the serial data path so the cluster will see it in HPT? Possibly in system options on the tune? When I compare to an 03+ file I do not see any differences in system options under oil pressure. Is this possible?

[JHPerformance]

Without the operating system programmed to output a serial line for oil pressure I do not think the PCM will know to look for the data on the 3 pins without it enabled.

[JHPerformance]

Can anyone help? I am held up on this, with it plugged in it doesn't transmit serial signal to the computer... I need to program the PCM to make it look for data on those pins. Surely someone has ran into this? No 99-02 PCM's in a factory 03-07 trucks???

[JHPerformance]

I wonder if I just set the oil pressure value under the system options matrix to 1, for my platform if that will do the trick, or if it will permanently damage the PCM..

[cobaltssoverbooster]

unless you get really lucky and find the one person doing hex reformatting in here, this forum isnt going to be able to help.
hpt does not have the capability to enable disable serial read or make the ecu aware of a change in can signal.
this is why your thread is basically dead...your asking for something the software cannot accommodate.

[JHPerformance]

Thanks for the clarification.

[JHPerformance]

Just updating this thread for those in the future with my situation. After emailing support, and talking to engineering they said it was impossible. What I ultimately ended up doing was flashing in an 02 vette O/S with my tech 2, 02 vette's were P01 Blue/Red and use serial oil pressure to run the clusters. Works like a charm

[general23cmp]

I know this is an old thread, but did flashing affect your dbw? With an 02 truck, it would have a different pedal, TB, and control box, right?

[LSxpwrdZ]

I know this is an old thread, but did flashing affect your dbw? With an 02 truck, it would have a different pedal, TB, and control box, right?

2002 truck didn't have electronic throttle. It was mechanical throttle. The other option is to take your 2002 Fbody file and segment swap the "Engine Diagnostics" and "System" segments from a C5 into your file. The Class2 communication protocols are stored in those two segments.

[general23cmp]

His first post said it was 02 DBW. My 02 that I have is as well.

[LSxpwrdZ]

From the data I have the voltages from both the APP and the TB look to be very similar between the two so a corvette OS should work with Truck TAC module, pedal and TB. If not you'd have to swap back over all the throttle information from the OEM file after segment swapping or flashing the C5 tune in. And HPT doesn't have all those tables populated so it'll be copy/paste in hex.

Easiest thing to do is to just enable the Class2 comms in the existing tune as to not F up anything else in the swap. That also will require hex editing.

[2xLS1]

2002 truck didn't have electronic throttle. It was mechanical throttle. The other option is to take your 2002 Fbody file and segment swap the "Engine Diagnostics" and "System" segments from a C5 into your file. The Class2 communication protocols are stored in those two segments.

I've seen some 02 trucks and Tahoes with ETC because they had Traction Control.

[JHPerformance]

I know this is an old thread, but did flashing affect your dbw? With an 02 truck, it would have a different pedal, TB, and control box, right?

Yes, sorry should have mentioned this, I did have the C5 TAC, TB, and pedal already from my mass collection of spare parts.

[JHPerformance]

From the data I have the voltages from both the APP and the TB look to be very similar between the two so a corvette OS should work with Truck TAC module, pedal and TB. If not you'd have to swap back over all the throttle information from the OEM file after segment swapping or flashing the C5 tune in. And HPT doesn't have all those tables populated so it'll be copy/paste in hex.

Easiest thing to do is to just enable the Class2 comms in the existing tune as to not F up anything else in the swap. That also will require hex editing.

Hey James, I have a couple 02 6.0 Denali files, maybe late 01 possibly? They have the reverse C5 TB and the solid black truck TAC. etc... I wish I knew more about code to enable that class 2, I have some hex editors, but I dont know what to apply where to enable it unfortunately. I do know the C5 TB polarity is reversed from the Truck TB, as I tried using it ultimately at first with the C5 TAC. It would respond, but REP... ultimately swapped all throttle hardware over from C5 parts. Wish Id spent more time on this, I know it could have been useful to get that enabled to someone..

[LSxpwrdZ]

Hey James, I have a couple 02 6.0 Denali files, maybe late 01 possibly? They have the reverse C5 TB and the solid black truck TAC. etc... I wish I knew more about code to enable that class 2, I have some hex editors, but I dont know what to apply where to enable it unfortunately. I do know the C5 TB polarity is reversed from the Truck TB, as I tried using it ultimately at first with the C5 TAC. It would respond, but REP... ultimately swapped all throttle hardware over from C5 parts. Wish Id spent more time on this, I know it could have been useful to get that enabled to someone..

Yea it was extremely rare to see DBW on the trucks/suv's in 99-02. And they were completely different than the 03-up stuff that did have it. C5 throttle hardware was probably the smartest move there.