Diagnostic Aids

WARNING: This page is about a different variant/trim than selected.

If problem is intermittent, see INTERMITTENT TROUBLE CODE DETERMINATION under SELF-DIAGNOSTIC SYSTEM.

Fig 1: Identifying Ignition Coils

Courtesy of GENERAL MOTORS CORP.

IGNITION COIL CIRCUIT IDENTIFICATION

Cylinder No.

Terminal

Wire Color

At Ignition Coil Connector

1 & 8

C ⁽¹⁾

Purple

2 & 7

C ⁽¹⁾

Red

3 & 6

C ⁽¹⁾

Light Blue

4 & 5

C ⁽¹⁾

Dark Green

At PCM Connector C2 ⁽²⁾

Purple

Red/White

Light Blue

Dark Green/White

Dark Green

Light Blue/White

Red

Purple/White

⁽¹⁾	For all ignition coils, terminal "A" is a Black wire, terminal "B" is a Brown wire and terminal "D" is a Pink wire.

⁽²⁾	See Figure.