What are my options for the accelerator pedal on a drive-by-wire LS swap?

Here is what the documentation says. Each point links to its source; details depend on your exact computer, harness and transmission.

• E67; LSA; 2009-2013: PSI lists compatible LSA controllers as GM service number 12636659 for 2009 and 12633264 for 2010-2013, and lists the Corvette accelerator pedal position sensor as GM part number 25835421. (PSI Conversion (via manuals.plus))
• E67; LSA; 2009-2013: PSI lists GM part number 25835421 (Corvette accelerator pedal position sensor) as the compatible APP sensor for its 2009-2013 LSA DBW harness; using a non-selected component can prevent correct operation. (PSI Conversion (via manuals.plus))
• 0411; LS1, LS6; 1997-2004: The 1997-2004 C5 Corvette throttle pedal uses a nine-pin rectangular connector and works only with the early all-plastic TAC module, a 411 PCM, and the matching C5 TAC sub-harness; the connector looks almost identical to the truck pedal connector but the wiring is different. (LSX Magazine (Power Automedia))
• 0411, 242; 2001-2005: The 2001-2005 full-size truck/SUV steel-arm DBW pedal is versatile: with its own TAC sub-harness it can work with either the early-style TAC module and 411 PCM or the 242 PCM and later-style TAC module. (LSX Magazine (Power Automedia))
• 242; 2006-2007: Starting in 2006, GM truck/SUV DBW pedals use a plastic arm and a six-pin electrical connector; these pedals work only with the later-style TAC module and 242 PCMs and have a bulky mounting footprint. (LSX Magazine (Power Automedia))
• 0411, 242; 1973-1998: PSI offers a direct-fit DBW pedal for 1973-1998 GM full-size trucks and SUVs that bolts in place of the factory mechanical-linkage pedal; it requires its own TAC module sub-harness, also available from PSI. (LSX Magazine (Power Automedia))
• LSx: The Holley 558-406 DBW harness fits Dominator and Terminator X Max systems, is plug-and-play with Holley pedal 145-160, and is designed for GM throttle bodies 12570790 and 12580760 and GM pedals 10379038 and 19417903. (EFISystemPro)
• 2006-2012: Lokar sells vehicle-specific billet DBW throttle modules with wiring harness included: XBDBW-GM05 for 2006-2007 Chevy trucks, XBDBW-GM01 for 2007-2012 Chevy trucks, and the clear-billet BDBW-GM03. (Speedway Motors)

Confirm against the instructions for your exact parts before wiring. More: Throttle (drive-by-wire) in our tuning guide.