GMC Repair: no start yukon, fuel pump relay, gmc yukon

Question
19993 gmc yukon, crank no start, no fuel pressure, fuel pump relay on bulkhead not clicking, test for power and ground to relay-yes. what I dont have I believe is power from the ecm on green/wht wire circuit 456 I think. I am using the charlton wiring diagram in the back of the manual. If no power from ecm, the relay doesnt ground causing no power to the fuel pump? truck will run on starting fluid. Thanks in advance. chad.

Answer
Check your fuses and ignition switch powers going into the ECM. If you are getting good power and ground at the ECM, but it ts not sending the signal to your fuel pump relay then it may be bad. Also I would have it checked to see if there are any security codes stored.