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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 934 (Automatic Transmission - 6L50/6L80/6L90 - DTC P0218 To DTC P0990) >> DTC P0601, P0602, P0603, P0604, or P1621 >> DTC Descriptors

DTC Descriptors

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0601

Transmission Control Module (TCM) Read Only Memory (ROM)

DTC P0602

Transmission Control Module (TCM) Not Programmed

DTC P0603

Transmission Control Module (TCM) Long Term Memory Reset

DTC P0604

Transmission Control Module (TCM) Random Access Memory (RAM)

DTC P1621

Transmission Control Module (TCM) Long Term Memory Performance

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