LaCrosse V6-3.8L VIN 2 (2005)
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When the compression is low on the first stroke and tends to build up on the following strokes, but does not reach the normal compression, or
if the compression improves considerably with the addition of three squirts of oil, the piston rings may be the cause.
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When the compression is low on the first stroke and does not build up in the following strokes, or the addition of oil does not affect the
compression, the valves may be the cause.
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When the compression is low on two adjacent cylinders, or coolant is present in the crankcase, the head gasket may be the cause.
11. Remove the block from the throttle plate.
12. Install the air duct to the throttle body.
13. Install the spark plugs.
14. Install the Powertrain Control Module (PCM) fuse.
15. Install the ignition fuse to the I/P fuse block.
