GM Service Manual Online
For 1990-2009 cars only

Glow Plug Control Module Programming and Setup RPO LLY or LBZ

The following service procedures require either a programming or a setup event performed for a complete repair.

GPCM Replacement

If the glow plug controller (GPCM) is replaced, the following procedures must be performed.

    •  Fuel Injector Flow Rate Programming for fuel injector flow rate programming
    •  Service Programming System (SPS) for GPCM programming

GPCM Reprogramming

If the glow plug controller (GPCM) needs to be reprogrammed, refer to Service Programming System (SPS) .

Setup for Component Replacement

The replacement of some components will require a setup procedure for complete repair.

If any of the following components are replaced, the Fuel Injector Flow Rate Programming must be performed.

    • Fuel injector
    • Engine control module (ECM)
    • GPCM

Glow Plug Control Module Programming and Setup RPO LG4

This module does not require that a programming event or a setup event is performed.