27 May 2018

Six Revisions In Nine Model Years.

I looked up the interchange part numbers for my HVAC module.  Mine's 15858813.

"Manufacturer Part Number (25938052), Other Part Number (15222526, 15858813, 15235202, 10385389, 10395614)."

That's five obsolete numbers and one good one.

What would be difficult to discover is what changes between part numbers.

I also confirmed that the HVAC in C6's weren't subject to options.  That means that there should be a single part for all years... but something caused GM to abandon the part they used in 2005 and replace it five times with a different revision.

I also love how GM nukes a whole part number to propagate a revision.  It really removes doubts about if you've got the revised part.

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