1996 GMC Sierra timing marks

ELKJUNKIE

MEMBER
1996 GMC SIERRA
V8
4WD
AUTOMATIC
140,000 MILES

I know where the mark on the harmonic balancer is but I cant find the tdc/0 mark. I was wandering if you could give me an accurate discription as where to find it

Thursday, July 1st, 2010 AT 4:32 PM

3 Replies

BLUELIGHTNIN6

MECHANIC
16,542 POSTS

Too many engine choices. Which one are we talking about? 5.0L, 5.7L or 6.5L diesel?

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Thursday, July 1st, 2010 AT 4:41 PM

ELKJUNKIE

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1 POST

It is a 5.7L

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Thursday, July 1st, 2010 AT 4:55 PM

BLUELIGHTNIN6

MECHANIC
16,542 POSTS

BASE TIMING
The distributor ignition system has no provision for timing adjustment. The base timing is preset when the engine is manufactured and no adjustment is possible.

The distributor may need adjusting to prevent crossfire.

Refer to Camshaft Retard Offset Adjustment See: Ignition Timing > Adjustments > Camshaft Retard Offset Adjustment

Ignition timing can only be changed by reprogramming the PCM using Techline Information System 2000 (TIS 2000) PC, and the Tech 2 scan tool. Please contact your dealer for necessary updates and procedures.

timing marks for the timing chain are below, you will want to use a compression gauge / compression whistle to get to TDC first .