LS1B vs P10 serial data

I'm helping install a Turbo 5.3L (LS1B) into a 2002 Trailblazer that originated life with a 4.2L (P10 ECM). Does anyone know if the two ECMs share compatible serial data streams? (i.e., will the LS1B and TAC module 'play nice' with the 2002 Trailblazer's A/C, Cruise Control, Dash instruments, etc?)

Flash the LS1B with an 02/03 5.3L V8 file from an extended TB and just remove the P10 altogether. It's a factory combo so should work well.

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Originally Posted by Yellow05C6

I'm helping install a Turbo 5.3L (LS1B) into a 2002 Trailblazer that originated life with a 4.2L (P10 ECM). Does anyone know if the two ECMs share compatible serial data streams? (i.e., will the LS1B and TAC module 'play nice' with the 2002 Trailblazer's A/C, Cruise Control, Dash instruments, Geometry Dash, etc?)

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Hello Yellow05C6!
Have you loaded Flash the LS1B with an 02/03 5.3L? I tried it and found it quite stable.

Quote:

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Originally Posted by Yellow05C6

I'm helping install a Turbo 5.3L (LS1B) into a 2002 Trailblazer that originated life with a 4.2L (P10 ECM). Does anyone know if the two ECMs share compatible serial data streams? (i.e., will the LS1B and TAC module 'play nice' with the 2002 Trailblazer's A/C, Cruise Control, Dash instruments, etc?)

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The P10 and LS1B ECMs use different serial data protocols, so they're not directly compatible when it comes to modules like the BCM, IPC, or TAC. In a 2002 Trailblazer, the P10 communicates via Class 2 (J1850), while the LS1B from a 5.3L setup also uses Class 2, but implementation can vary depending on the donor vehicle. You may run into issues with A/C controls, cruise, and dash functionality unless you either reprogram modules to match or use a standalone setup for the engine and retain factory systems with a data bridge or custom tuning