Please identify this novel for me?

I read it back in the '80s, I think. It’s set in Vietnam, and there’s a black GI whose nickname is Chigger or Chigro or Chegro. As I recall, he meets a particularly grisly end.

I’m pretty sure it’s not Going after Cacciato. Any ideas?

Carpenter’s Gothic?

Doesn’t sound familiar. IIRC, the action takes place during the war.