2007 gmc 6.6 turbo codep2563

Question

can you tell me what my problem is.

Answer 1

P0299 Turbocharger engine under boost

P2563 Turbocharger boost control position sensor performance

P0299 is the main code condition. P2563 is the result of the turbo charger under boost. When the engine underboost occurs this can be from leaking inlet tubes or exhaust leaks before the turbocharger or  the turbocharger vanes.This TSB may apply to your condition TSB # 03-06-93-001D