Sierra 3500 Denali 4WD V8-6.0L (2011)
Transmission Pressure Test Port: Service and Repair
Allison - Automatic Transmission
Automatic Transmission Fluid Pressure Test Hole Plug Replacement
Removal Procedure
1. Remove the pressure tap plug (2) and O-ring (1) on the bottom of the converter housing near the transmission external oil filter.
2. Remove the O-ring from the plug and discard it.
Installation Procedure
1. Install a new O-ring (1) on the pressure tap plug (2).
Caution: Refer to Fastener Caution (See: Service Precautions/Vehicle Damage Warnings/Fastener Caution).
2. Install the plug and O-ring into the converter housing.
Tighten the plug to 12 Nm (108 lb in).
