Chevrolet Silverado / GMC Sierra. Service manual — part 758

1. Pull the plastic cap back from the quick connect fitting and down along the cooler line

about 5 cm (2 in).

2. Using a bent-tip screwdriver, pull on one of the open ends of the retaining ring in order to

rotate the retaining ring around the quick connect fitting until the retaining ring is out of
position and can be completely removed.

3. Remove the retaining ring from the quick connect fitting.

4. Discard the retaining ring.

Fig. 54: Cooler Line & Quick Connect Fitting
Courtesy of GENERAL MOTORS CORP.

5. Pull the cooler line straight out from the quick connect fitting.

IMPORTANT: Perform the following procedure when removing the retaining

rings and cooler lines from the quick connect fittings located
on the radiator and/or the transmission.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

INSTALLATION PROCEDURE

1. Install a new retaining ring into the quick connect fitting using the following procedure:

Fig. 55: Hooking Retaining Ring Into Quick Connect Fitting
Courtesy of GENERAL MOTORS CORP.

2. Hook one of the open ends of the retaining ring in one of the slots in the quick connect

IMPORTANT:

Do not reuse any of the existing oil lines or oil line
fittings if there is excessive corrosion.

Do not reuse any of the existing retaining rings that were
removed from the existing quick connect fittings. Install
new retaining rings.

Ensure the following procedures are performed when
installing the new retaining rings onto the fittings.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

fitting.

Fig. 56: Rotating Retaining Ring Around Fitting
Courtesy of GENERAL MOTORS CORP.

3. Rotate the retaining ring around the fitting until the retaining ring is positioned with all

three ears through the three slots on the fitting.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Fig. 57: Identifying Improper Engine Oil Cooler Hose/Pipe Retaining Ring
Installation
Courtesy of GENERAL MOTORS CORP.

4. Do not install the new retaining ring onto the fitting by pushing the retaining ring.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado