Tony H wrote on 01. Jun 2009 at 23:05:
As title replaced the HBV today thanks to PeteG for his "How to"very helpful
It was a bit of a fiddle when you've got hands like bunches of bananas and fingers like cumberland sausages but I got there in the end less a bit of knuckle skin!

I bought the replacement valve from the main stealers and was suprised to find that there was no G.M markings on either the box or the part anyone Know the score?
It is very easy to get to whent he scuttle cover and wiper motor is removed. I had my plenum and inlet manifold off too so that might have made it slightly easier. It took me a couple of minutes to change, but several to remove all the bits to get to it easily!