GE PSI also offers fully integrated "free play" Systems Integration Laboratories (SIL) and complex systems modelling for those customers who desire such fidelity and risk reduction. The SIL and Systems Modelling products reduce development risk as well as reduce the potential for undetected problems making it to the field. Since these types of problems cost much more to correct once a system has been fielded a well designed and executed SIL is many times a wise investment.

GE possesses extensive experience in the development and implementation of SILs. Both simulation based test stations and SIL experience is derived from various avionics platform activities on C-130, A-4, F-15, Nimrod MPA, B737, B747 (E-4B), B707 (E-6), as well as other vehicle types including rotary wing. GE has also supported experimental and advanced flight deck modifications. One such effort went on to demonstrate advanced concepts being echoed in the current C-130 Avionics Modernization Program (AMP) effort. Additionally, GE has developed several other SILs in support of programs such as C-130 Self Contained Navigation System (SCNS), KC-767 Tanker, and Nimrod. The C-130 SCNS SIL is a completely functional aircraft simulation coupled with flight hardware. Display instruments, communication radios, navigation radios, infrared systems, radar systems, GPS systems, inertial platforms of several types, air data systems, as well as most other flight deck equipment has been integrated via GE SILs.