Here are a couple of books on amazon that I found pretty easily......
http://www.amazon.com/Chevy-GMC-Truc...065837-4268116
http://www.amazon.com/Chevy-Trucks-H...065837-4268116
http://www.amazon.com/exec/obidos/ASIN/0760301034
http://www.amazon.com/exec/obidos/ASIN/0879382821
http://www.amazon.com/exec/obidos/ASIN/0760316341