Control Valve Body Assembly Installation

WARNING: This page is about a different car, the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban 3500 HD, and 2018 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Control Valve Body Assembly (With Tightening Sequence)

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
1	Automatic Transmission Fluid Pump Seal NOTE: Install a NEW seal. Do NOT reuse the old seal.
2	Automatic Transmission Fluid Pump Seal NOTE: Install a NEW seal. Do NOT reuse the old seal.
3	Center Support Fluid Passage Seal NOTE: There are two different designs for the Center Support Fluid Passage Seal. The design for 6L45/50 (MYA/MYB) models utilizes tabs. The design for 6L80/90 (MYC/MYD) models does not have tabs. Install a NEW seal. Do NOT reuse the old seal.
4	Control Valve Assembly CAUTION: The control valve body assembly needs to be lowered into place vertically, with no lateral movement. Lateral movement can damage the pass through connector pins and/or the oil transfer seals. NOTE: Align the manual shift shaft position switch activator slide with the detent lever guide pin.
5	Valve Body Bolt (Qty: 6) CAUTION: Refer to Fastener Caution . Tighten in sequence 8 N.m (71 lb in). Special Tools DT-48285 Valve Body Torx Plus Socket (if applicable) Equivalent regional tools: Special Tools