Hello to all,

I have a 2008 Chev. 3500 Express van - Duramax - Quidley 4x4 - 144,000
Had engine light come on at approx 125,000 and had dealer advise that the egr valve is sticking. they advised it would be a $950 fix. Holding off right now. Had another check engine light come on at 135,000 and found to be #8 glow plug faulty and had it replaced. At 141,000 had another check engine light come on and found that #6 glow plug is faulty. Actually then was advised by dealer that the Duramax actually does not need to use the glow plugs in my climate. I am really to do some modifications. First question is can the glow plugs be deactivated from energizing? Second question - Can I install plate to block egr valve? Third question and last until I receive response - How can I get better fuel economy?

Regards, HPS