Yow, I just read a couple of Chevy sites and it appears that gmpartsdirect.com does not appear to be selling the Toshiba 9011 HIR bulbs. One guy ordered a set and got an 65w AC Delco/Phillips bulb that he said was definitely not a Toshiba HIR. Interestingly, he said the bulb had 9011 and HIR marked on it, so BEWARE!
I agree that a Chevy/GM dealer selling OE parts, will probably sell a Toshiba bulb. Problem for me is of the 3 dealers I called in my area, SF Bay Area, anone of them stocked this bulb and would have t special order it. Further, all the dealers had a list price of $36 and said $18 was way low.
Can you get a good 40-50% discount at your local Chevy/GM dealer? If so, you want the 2003-05 Avalanche HIGH BEAM bulb, p/n 15094219. I wonder if any of the local junkyards would have the bulb in stock....Good Luck!
I guess I don't feel so bad paying what I did on ebay, 26.95 each plus 5.00 shipping..
Here is the link to the ebay ad 9011/9012 Toshiba Bulbs
and here is what mine look like;
Good luck in the salvage yards but that might pay off hansomely if you can find the right trucks.