ACADIA 17 VIN Z (11th digit), 3.6L, (VIN S, 8th digit, opt LGX), w/heavy duty cooling (opt V08). ACADIA 18-21 3.6L, (VIN S, 8th digit, opt LGX), w/heavy duty cooling (opt V08). ACADIA 22 3.6L (VIN S, 8th digit, opt LGX), w/heavy duty cooling (opt V08).