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I am sending you a copy of the GM trouble for tracing down the problem for your code P1361. This code relates to the ignition control and knock sensor circuit systems. The diagnostics for this are mush easier to do if you have a class 2 scan tool to assist you when running function tests. Note that any blue high lights will not open for you as they are GM access only. Thanks
Was the Powertrain On-Board Diagnostic System Check performed?
Go to Step 2
Go to Powertrain OBD System Check
Did DTC P1361 set?
Go to Step 3
Refer to Diagnostic Aids
Is the test light ON?
Go to Step 8
Go to Step 4
Is resistance greater than the specified value?
6K ohms (6000 ohms)
Go to Step 12
Go to Step 5
Go to Step 10
Go to Step 6
Was a problem found?
Go to Step 15
Go to Step 7
Go to Step 14
Go to Step 11
Go to Step 13
Locate and repair short to ground in the IC circuit (refer to Engine Electrical).
Is action complete?
Locate and repair short to ground in the bypass circuit (refer to Engine Electrical).
Replace the PCM.
Important: Replacement PCM must be programmed. Refer to PCM Replacement/Programming.
Replace the ignition control module.
Does scan tool indicate DTC P1361 failed?