One of the amps (apparantly there are two) in my '03 EXT died, so now only half of my speakers work :( The new one from delaership would be around $700. I've read somewhere that they use the same amp as for GMC Denali which is about $300.
Is this true? Have any of you guys heard of or done this?

Thank you in advance.

check on ebay , just be specific on your search, good luck