I"m in the process of this, you have to buy the 03+ dash bezel (only difference is the bar under the stereo. then the easy way is to also get the stereo basket out of the 03+ also. the avalanche forum talks about this. it's like 4-6 screws and like 2 rivets. swap those out and it's a 98% bolt in project. You end up having to trim above the ashtray or something slightly.
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