Chevrolet Silverado / GMC Sierra. Manual — part 804

VALVE BODY, CONTROL SOLENOID TORQUE SEQUENCE

Fig. 186: Valve Body, Control Solenoid Torque Sequence
Courtesy of GENERAL MOTORS CORP.

Tip: Hand tighten only.

4

A/Trans Manual Shift Shaft Position Switch
Harness Clip
Tip: The wiring harness clip on the manual shift
shaft position switch does not need to be replaced
if damaged or missing. The clip functions only as
a manufacturing assembly aid to keep the harness
clear during an automated bolt installation
process. If the clip is damaged, simply remove
and discard.

5

A/Trans Manual Shift Shaft Position Switch
Electrical Connector
Tip: Connect and lock the manual shift shaft
position switch electrical connector to the control
solenoid valve assembly.

2008 Chevrolet Silverado 1500

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

Sierra & Silverado

Valve Body, Control Solenoid Torque Sequence

CONTROL SOLENOID VALVE ASSEMBLY CONTACT GAP INSPECTION

Callout

Component Name

Preliminary Procedure

1. Hand tighten the last 6 bolts before final torque sequence.

2. The 2 "heat sink" bolts must be tightened last.

NOTE:

Bolt torque sequencing is critical to the proper function of the control solenoid valve assembly.
Failure to follow the required sequencing may result in transmission malfunction.

1

Bolts M5 x 45 (Qty: 5)

2

Bolt M5 x 55

Procedure:
Tighten all 18 bolts in the sequence shown.

Tighten: 8 N.m (71 lb in).

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

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

Sierra & Silverado

Fig. 187: Inspecting Control Solenoid Valve Assembly Contact Gap
Courtesy of GENERAL MOTORS CORP.

Control Solenoid Valve Assembly Contact Gap Inspection

INPUT AND OUTPUT SPEED SENSOR ASSEMBLY INSTALLATION

Callout

Component Name

1

Control Solenoid (w/Body and TCM) Valve
Assembly
Tip: Inspect the contact area between the "heat
sink" area of the control solenoid valve
assembly and the valve body. There should be
no visible gap. If a gap exists, loosen all 18
bolts and retighten in the required sequence.

2008 Chevrolet Silverado 1500

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

Sierra & Silverado

Fig. 188: Installing Input and Output Speed Sensor Assembly
Courtesy of GENERAL MOTORS CORP.

Input and Output Speed Sensor Assembly Installation

Callout

Component Name

1

A/Trans Input and Output Speed Sensor Wiring
Harness Clip (Qty: 2)
Tip: Inspect the 2 wiring harness clips for

2008 Chevrolet Silverado 1500

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

Sierra & Silverado