Trouble Code Charts: Notes

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The following diagnostic flow charts and circuit schematics are provided courtesy of General Motors Corp.

NOTE: Some charts require the use of a bidirectional (Tech 1) Scan tester. If a bidirectional Scan tester is not available, the PCM/TCM-controlled relays and solenoids may be energized by grounding ALDL test terminal "B" with ignition on and engine off.