The vehicle was inspected and umbilicals connected June 9.

Power was applied June 10. Subsystems Reverification Tests (SSRT) began June 14. SSRT was a simplified test program which replaced Subsystems Functional Verification Test (SSFVT). SSFVT, performed on the first four GLVs, repeated tests that had already been performed at Martin-Baltimore. SSRT simplified subsystems checkout by requiring only that the factory findings be reverified, rather than duplicated, for GLV-5 and all later launch vehicles. SSRT was completed June 28. The launch vehicle Combined Systems Test to verify its readiness for mating was run June 29.