Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DBβ LIVE
HOMESERVICE MANUALSCHEVROLET2008SILVERADO 2500 2WD V8-6.6L DSL TURBOREPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINAUTOMATIC TRANSMISSION/TRANSAXLESERVICE AND REPAIROVERHAULALLISON - AUTOMATIC TRANSMISSIONASSEMBLE, DISASSEMBLE, AND INSTALLATIONCONTROL VALVE BODY ASSEMBLY INSTALLATION
2008 Chevrolet Silverado 2500 2WD V8-6.6L DSL Turbo
Control Valve Body Assembly Installation
2008 Chevrolet Silverado 2500 2WD V8-6.6L DSL TurboSECTION Control Valve Body Assembly Installation
Control Valve Body Assembly Installation
Important: Installing a lint-free cloth into the park pawl cam guide hole prevents the manual valve pin from falling into the transmission.
1. Install a lint-free cloth (1) in the park pawl cam guide hole in the transmission case (2).
2. Position the transmission case so that the valve body face of the transmission case is facing up.
3. Align the manual valve pin (3) with the manual selector valve (2).
4. Rotate the manual valve pin (3) until the pin can be installed into the manual selector valve.
5. Install the manual valve pin (3) into the manual selector valve (2).
6. Install the manual selector valve into shift valve body (1).
Important: Do not drop the manual valve when removing or installing the control valve assembly onto or from the transmission case.
7. Rotate the detent lever/internal mode switch (IMS) assembly to the fullest counter-clockwise position.
8. Align the control valve assembly with the transmission case while installing the manual valve pin (2) into the detent lever/IMS assembly (1).
9. Align 2 control valve assembly locating pins (1) with the locating pin holes in the transmission case.
10. Install the control valve body assembly (2) onto the transmission case.
11. Remove the lint-free cloth (1) from the park pawl cam guide hole.
Notice: Refer to Fastener Notice .
12. Install 11 control valve assembly bolts (1) and 4 control valve assembly bolts (2).
Tighten the bolts to 12 N.m (108 lb in).
13. Install the manual shift shaft detent spring (2) onto the main valve body (4).
14. Make sure the pin of the manual shift shaft detent spring (2) engages the slot of the IMS and the detent spring roller rests on the detent lever (3).
15. Install 2 manual shift shaft detent spring bolts (1).
Tighten the bolts to 12 N.m (108 lb in).
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.