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The 3.4 twin cam 24v engine was an optional motor to the 3.1 base model. And the 3.4 was standard to the Lumina Z34 and LTZ model which was later phased out for the 3800.

HAYNES REPAIR MANUAL covering 1995-2001 Lumina, Monte Carlo, and Impala (FWD) page 2A-1 states...cylinder location (engine--the part where you put the spark plugs) when looking from the front of the vehicle the cylinders are numbered from left to right 2-4-6 (front part of engine); 1-3-5 left to right (rear of engine). Firing order 1-2-3-4-5-6. At the other end of the spark plug wire you should find a "bank" which matches the spark plug wire with the corresponding port. The "bank" from left to right when standing in front of the vehicle is 5-2-3-6-4-1. Spark plug wires should be from number 1 cylinder to number 1 on the bank. Then number 2 cylinder to number 2 on the bank, etc.

It's 1-2-3-4-5-6 and that's from the owners manual of a 97 lumina.

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โˆ™ 2015-05-06 00:39:26
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Q: What is the firing order for a Chevy Lumina 3.4L?
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