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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.

  1. 1:  This step checks to see if the AIR BAG indicator flashes seven times when the ignition is first turned ON.
  2. 2:  This step checks to see if the scan tool powers up.
  3. 3:  This step checks to see if the scan tool can communicate with the SDM.
  4. 4:  This step checks to see if there are any current or history DTCs present.
  5. 5:  This step checks to see if there are communication DTCs, U-codes, present.
  6. 6:  This step checks to see if DTC B1000 is present.
  7. 7:  This step checks to see if DTC B0092 or B0098 is present.
  8. 8:  This step checks to see if there are any current of history passenger presence system (PPS) flash codes present.
Diagnostic System Check - SIR

Step Action Yes No
1  Note the AIR BAG indicator while turning the ignition ON.
Does the AIR BAG indicator flash 7 times?		 Go to Step 2  Go to Symptoms - SIR 
2  Install a scan tool.
Does the scan tool power up?		 Go to Step 3  Go to Scan Tool Does Not Power Up in Data Link Communications
3  Attempt to establish communication with the SDM.
Does the scan tool communicate with the SDM?		 Go to Step 4  Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications
4 
  1. With a scan tool, request the SIR DTC display.
  2. Record the displayed DTCs on the repair order, specifying as current or history.
Does the scan tool display any current or history DTCs?		 Go to Step 5  System OK
5  Does the scan tool display any DTCs which begin with a "U"? Go to Diagnostic Trouble Code (DTC) List in Data Link Communications Go to Step 6 
6  Does the scan tool display DTC B1000? Go to DTC B1000 in Body Control System Go to Step 7 
7  Does the scan tool display DTC B0092 or B0098? Go to Step 8  Go to Diagnostic Trouble Code (DTC) List 
8 
IMPORTANT: It may be necessary to request the passenger presence system (PPS) to flash DTCs more than once. To ensure that no DTCs are present, perform this procedure 3 or 4 times.
  1. With a scan tool, request the PPS to flash DTCs. Refer toPassenger Presence System Flash Code Procedures .
  2. Record the flashed DTCs on the repair order, specifying as current or history.
Does the PPS flash any current or history DTCs?		 Go to Diagnostic Trouble Code (DTC) List  Go to Diagnostic Trouble Code (DTC) List 
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