Removal Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Rotating Retaining Ring Using Screwdriver

Courtesy of GENERAL MOTORS CORP.

Disengage the plastic caps from the quick connect fittings. Pull the caps back along the pipe.
Using a bent-tip screwdriver or equivalent, pull on one of the open ends of the retaining ring in order to rotate the retaining ring.
Rotate the retaining ring around the quick connector until the retaining ring is out of position and can be completely removed.
Discard the retaining rings.

Fig 2: View Of Engine Oil Cooler Line Connections

Courtesy of GENERAL MOTORS CORP.

Remove the engine oil cooler line from the quick connector fitting at the radiator.
Pull the lines straight out from the connectors.
Clean all of the components in a suitable solvent, and dry them with compressed air.
Inspect the fittings, the connectors, the cooler lines, and the cooler for damage, distortion, or restriction. Replace parts as necessary.