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Diagnostic Aids

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

If there is a restriction of the air flow through the radiator this DTC may set. Ensure that the vehicle front end has at least 1.5 meters (5 feet) of clearance from obstructions to airflow if vehicle is parked.

DTC P0A3E

Step Action Yes No
Schematic Reference: Engine Cooling Schematics 
Connector End View Reference: Cooling System Connector End Views 
1 Was the Engine Cooling Diagnostic System Check performed? Go to Step 2  Go to Diagnostic System Check - Engine Cooling 
2
  1. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
  2. With a scan tool, observe the SGCM DTC list.
Is the DTC set as current DTC?		 Go to Step 3  Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
3 Inspect the SGCM coolant level.
Is the SGCM coolant level low?		 Go to Cooling System Leak Testing - Starter/Generator Control Module  Go to Step 4 
4 Inspect the vehicle front end for obstructions to the radiator.
Did you find and correct the condition?		 Go to Step 10  Go to Step 5 
5 With a scan tool, command the starter/generator control module (SGCM) cooling fan ON and OFF.
Does the SGCM cooling fan turn ON and OFF with each command?		 Go to Step 6  Go to Starter Generator Control Module Cooling Fan Inoperative 
6 With a scan tool, command the SGCM Coolant Pump ON and OFF.
Does the SGCM coolant pump turn ON and OFF with each command?		 Go to Step 7  Go to Starter Generator Control Module Coolant Pump Inoperative 
7
  1. Observe the SGCM coolant tank.
  2. With a scan tool, command the SGCM Coolant Pump ON.
Does the SGCM coolant circulate when the SGCM pump is ON?		 Go to Step 8  Go to Draining and Filling Cooling System - Starter/Generator Control Module 
8 Inspect for poor connections at the harness connector of the SGCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 10  Go to Step 9 
9
IMPORTANT: Perform the programming procedure for the SGCM.
Replace the SGCM. Refer to Starter/Generator Control Module (SGCM) Replacement (5.3L Engine w/RPO HP2) in Engine Electrical.Did you complete the replacement?		 Go to Step 10  -
10
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?		 Go to Step 2  System OK
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