GM Service Manual Online
For 1990-2009 cars only

Converter Ballooning for Chevrolet Chevrolet W-Series Commercial W4 (W3500/W4500) 2006

Converter Ballooning

Checks

Cause

Converter Limit Valve (214)

Stuck open due to sediment or undersized bore

At High Speeds: Converter Limit Valve Feedback Orificed Cup Plug

Blocked

Converter Stator

Locked-up