Test Description

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.

The numbers below refer to the step numbers on the diagnostic table.

2: Checks for continuity in shorting link.
3: Repair the C2 shorting link.

DTC C0448

Step	Action	Yes	No
Schematic Reference: Power Steering System Schematics Connector End Views Reference: Power Steering System Connector End Views
1	Did you perform the electro-hydraulic power steering (EHPS) Diagnostic System Check?	Go to Step 2	Go to Diagnostic System Check - Power Steering System
2	Turn the ignition OFF. Disconnect the C2 harness connector from the EHPS module. Using a DMM, check for continuity between pins 18 and 19. Is there continuity in the circuit?	Go to Step 4	Go to Step 3
3	Repair shorting link in C2 connector. Refer to Connector Repairs in Wiring Systems. Did you complete the repair?	Go to Step 5	-
4	IMPORTANT: Always perform the calibration procedure for the brake pedal position (BPP) sensor. Refer to Brake Pedal Position Sensor Calibration Description and Operation . Replace the EHPS powerpack. Refer to Power Steering Pump Replacement (4.3L) Power Steering Pump Replacement (4.8L, 5.3L and 6.0L) Power Steering Pump Replacement (8.1L) Power Steering Pump Replacement (6.6L Diesel) Power Steering Pump Replacement (Parallel Hybrid Truck) .Did you complete the repair?	Go to Step 5	-
5	Turn ON the ignition, with the engine OFF. Use the scan tool in order to clear the DTCs. 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