CTS 2006-2007, CTS-V 2005-2007, DTS 2006-2007

Firing Orders

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Fig. 2.8L & 3.6L Engine firing order: 1-2-3-4-5-6

The Northstar V8 VIN Code 9 or Y is a 4.6L engine. The cylinders are arranged in 2 banks of 4 with a 90 degrees included angle. The left (front) bank of cylinders are number 2-4-6-8 and the right (rear) bank cylinders are 1-3-5-7. Engine firing order is 1-2-7-3-4-5-6-8.

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Fig. 5.7L & 6.0L Engine firing order: 1-8-7-2-6-5-4-3

 
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