hi i have done this job it is a pig of a job to do if you are a good mechanic take it on if not dont bother let a garage do it you have to remove to whole heater system under dash the heater pipes that go into matrix are held by 2 steel slide pins and a hidden bolt under the bonnet down by steering rack that holds the heater in place it is a nightmare to do if you want complete details message back and i will give you full details of how to do job if not garage it.
popeye, February 2009
This forum should help:- http://www.vauxhallownersnetwork.co.uk/forumdisplay.php?f=119
