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Ignition - Installation of Timing Indicator/Set Screw|Page 1432 > < Number 1 Cylinder Location
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Timing Marks and Indicators: Technical Service Bulletins
Ignition - Installation of Timing Indicator/Set Screw

GMC NUMBER:

89-T-58

GROUP:

6A - Engine Mechanical

DATE:

May, 1989

CORPORATE
NUMBER:

936104

SUBJECT:

INSTALLATION OF TIMING INDICATOR/SET SCREW ON PARTIAL ENGINE ASSEMBLIES

MODELS:

1985-89 S/T/M TRUCK W/2.5L

Figure 1

When completing the assembly of a 2.5L partial engine, please be aware of the following:

1)

1985 and 1986 2.5L truck engines -

The side-mounted timing indicator and plate assembly with attaching studs, as shown in Figure 1, should simply be transferred to the new partial
engine.

Ignition - Installation of Timing Indicator/Set Screw|Page 1432 > < Number 1 Cylinder Location