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That's great news!
Where Can I get access to this Bulletin?
Can't find the link at the moment, but here's the text.
H08-0601-01: Timing Chain Stretch and/or DTCs P0008, P0009, P0016, P0017,
P0018, P0019
Built Prior to Engine Number H071380576
A condition may occur with the HFV6 engine that will cause the MIL
to illuminate and may log DTCs P0008, P0009, P0016, P0017, P0018 and
P0019. Codes are set when the ECM detects that camshafts on either
bank of the engine are misaligned with the crankshaft. For a more
complete description of code setting parameters, refer to SI.
Important: This condition may affect the 7.7 mm pitch timing
chain, installed in engines after the following engine
number: H053340001.
The customer will only notice an engine warning light in
the instrument panel. This condition does not cause any obvious
driveability concerns or any abnormal engine noises.
There was an issue with the time chain manufacturing process
that caused, in a small number of engines, the chain links to
be outside design specifications. Over time, this may result in
chain elongation.
The degree of chain elongation will depend of the number of
affected links and the drive cycle of the engine during its life.
Typical expectation is that ECM detectable chain elongation
would occur in early engine life (i.e. 10,000 to 20,000 km).
If the vehicle meets the criteria explained, with any of
the previously mentioned DTCs logged in the ECM, the standard
service instructions for DTCs P0016, P0017, P0018, P0019 and P0008
and P0009 must be followed, prior to any diagnostic work being done
on the timing chains.
Refer to Engine Controls & Fuel – 3.6L,
DTC P0016, P0016, P0018, P0019 or document # 1985724 in SI or
Engine Control & Fuel – 3.6L, DTC P0008, P0009 or document #1985715
in SI.
ONLY the timing chains need to be replaced.
Idlers, guides and tensioners do not require replacement.
However, inspect the guides for any abnormal wear and replace
ONLY if necessary.
Once the original used chains have been removed, check the
free length against new, unused chains to confirm diagnosis. Ensure
that the chains are either laid flat on a bench and pulled
straight with no kinks or hung out straight vertically. Typical
chain elongation observed is a minimum of 3 mm on a doubled-up
chain, taking an approximate measurement.