If the valve springs have not been replaced - I would suggest checking to see if it is in the VIN range for the spring failures and proceed accordingly.
I only know this because my brother had a 2002 Z06 for the last 10 years and it came up as an issue with his, I know he had his TCS fixed recently as he sold it 2 days ago..
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~JAG~
NCRS#65120
68 GTO HO 4 spd Alpine Blue /Parchment 2 owner car
#21783 71 Corvette LT1 45k miles Orig paint - Brandshatch Green - National Top Flight - last known 71 LT1 built.
71 Corvette LT1 42k miles Original paint - Black - black leather - only black LT1 known to exist.
NUMEROUS Lemans blue Camaros,
Monza Red and Daytona Yellow Corvettes
& a Chevelle or two...
Survivors, restored cars, & other photos
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