Installation Procedure

Apply a coating of lubricant to the O-ring seal and the cleaned surface of the plug opening in the block. Use a water spray resistant, high-temperature grease lubricant (GM P/N 9985164 or equivalent).
NOTE: The block heater element must not touch the engine block inner wall in the installed position or damage to the engine block and the block heater could result.
Install the engine block heater into the engine block. Position the heater element 90 degrees perpendicular (1) to the crankshaft centerline.

Fig 1: Positioning Heater Element
Courtesy of GENERAL MOTORS CORP.
Push the engine coolant heater into the block until the outer edge is flush with the engine block surface.

Fig 2: Identifying Correct Position Of Engine Coolant Heater
Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
Tighten the bolt until both locking wings draw tight against the inner wall of the engine block.
Tighten

Tighten the bolt to 1.9 N.m (17 lb in).

Fig 3: Identifying Correct Position Of Locking Wings Against Inner Wall
Courtesy of GENERAL MOTORS CORP.

NOTE: The heater cord must not touch the engine, hot pipes, manifold, or any moving parts. Route the cord to the left front of the engine compartment securing with tie straps as necessary to prevent damage.
Install the heater cord to the coolant heater.
Route and secure the heater cord through the engine as shown.

Fig 4: Identifying Heater Cord Connection At Core Plug
Courtesy of GENERAL MOTORS CORP.
Route and secure the heater cord across the engine cowl as shown.

Fig 5: Routing And Securing Heater Cord Across Engine Cowl
Courtesy of GENERAL MOTORS CORP.
Route and secure the heater cord to the VCM wiring harness.
Fill the reservoir with engine coolant. Refer to DRAINING AND FILLING COOLING SYSTEM .
Inspect the system for leaks.

Fig 6: Routing And Securing Heater Cord To VCM Wiring Harness
Courtesy of GENERAL MOTORS CORP.