Quote:
Originally Posted by ryanmcb
I read on a website that in 73-74 that Sierra Grande was the top model and then in 75 they switched it to High Sierra. Maybe the YE9 just designates the top model.
I'm sure some experts can clarify. I just think it is odd so see a Chevy package listed on there.
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Yes, YE9 is always the top model but the name changed through the 70s. I seem to recall that depending on the year and factory they would use Z88 RPO to identify it as a GMC, so I could see the combination of Z88 + Chevy naming on the other options on SPID, but your's doesn't have that either.