guage cluster help
 

can someone tell or show me the wiring diagram for the connector in the back of the guage cluster ?

Try this link:
GMC Paul's Tech Tips

update
 

ok i have done some testing of the sender wire and the temp guage and the wiring harness and the voltage at the guage cluster

sender wire has no ohm drop from the pin on guage plug to the sender on the motor...

temp guage reads 54.2 ohms resitance across the two side terminals

voltage at the guage on the printed circuit reads 12.8 volts on one side and 7.4 volts on the other