C 3500 Truck 2WD V8-6.0L VIN U (2001)
Discard the retaining ring.
7. Pull the cooling line straight out from the quick connect fitting.
8. Repeat this procedure to remove all the remaining cooling lines from quick connect fittings.
9. If vehicle does not have an auxiliary transmission oil cooler, disconnect the cooling lines from the radiator.
10. If vehicle is equipped with an auxiliary oil cooler, disconnect the oil cooling lines from the auxiliary oil cooler.