If you can't check codes you can always use a multimeter to check the PCS's resistance. That way you have a better idea before you rip it all apart again.
Retros, LEDs, SD Hood GMPP, Votland, Addco
06+ Impala brakes, L76 Springs, ERs, Self-Tuned, 3.5 Gen V L32, Ported TB, 240a CS144, SSAC, Upgraded Transmission, Android Head Unit, Remote stuff, GXP Seats