K 1500 Yukon Denali AWD V8-6.0L VIN U (2002)
Engine Control Module: Service and Repair
Powertrain Control Module (PCM) Programming (On-Board)
BEFORE PROGRAMMING A CONTROL MODULE
IMPORTANT: DO NOT program a control module unless you are directed by a service procedure or you are directed by a General Motors
Corporation service bulletin. Programming a control module at any other time will not permanently correct a customers concern.
Ensure the following conditions are met before programming a control module:
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Vehicle system voltage
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There is no charging system concern. All charging system concerns must be repaired before programming a control module.
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Battery voltage is greater than 12 volts but less than 16 volts. The battery must be charged before programming the control module if the
battery voltage is low.
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A battery charger is NOT connected to the vehicle's battery. Incorrect system voltage or voltage fluctuations from a battery charger, may cause
programming failure or control module damage.
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Turn OFF or disable any system that may put a load on the vehicle's battery.
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Twilight sentinel
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Interior lights
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Daytime running lights (DRL). Applying the parking brake, on most vehicles, disables the DRL system. Refer to the Owners manual.
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HVAC systems
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Cooling System fans, etc.
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The ignition is in the proper position. The scan tool prompts you to turn ON the ignition, with the engine OFF. DO NOT change the position of the
ignition switch during the programming procedure, unless instructed to do so.
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All tool connections are secure.
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RS-232
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The connection at the DLC is secure.
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Voltage supply circuits
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DO NOT disturb the tool harnesses while programming. If an interruption occurs during the programming procedure, programming failure or
control module damage may occur.
REMOTE PROGRAMMING
1. Turn OFF the ignition.
2. Install the Tech 2 to the data link connector (DLC).
3. Turn ON the ignition, with the engine OFF.
4. Turn OFF all vehicle accessories.
5. With the Tech 2, select Service Programming.
6. Identify vehicle information as requested by the Tech 2.
7. Select the type of module you are programming.
8. Select the type of programming to be performed.
9. Verify the displayed VIN with the vehicle VIN. If the displayed VIN does not match the actual VIN, write down the actual VIN and correct the
VIN at the Techline terminal.
10. When complete, Exit Service Programming.
11. Turn OFF the Tech 2 and disconnect the Tech 2 from the vehicle.
12. Turn OFF the ignition.
13. Connect the Tech 2 to the Techline terminal.
14. Select Service Programming.
15. Select Tech 2 as the tool you are using.
16. Select the type of programming to be performed.
17. Verify the displayed VIN with the vehicle VIN. Correct the VIN as necessary.
18. Select the type of module you are programming.
19. Identify what type of programming that you are performing.
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Normal-This type of programming is for updating an existing calibration or programming a new controller.
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Vehicle configuration index (VCI)-This selection is used if the vehicle VIN is unavailable or not recognized by the Techline terminal.
Observe, you will need to contact the Techline Customer Support center to use this option.
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Reconfigure-This is to reconfigure a vehicle, such as tire size and axle ratio changes.
20. Select the appropriate calibration file.
21. Ensure all connections are secure.
22. Select Reprog to initiate the download of the new calibration to the Tech 2.
23. After the download is complete, turn OFF the Tech 2.
24. Disconnect the Tech 2 from the Techline terminal.
25. Install the Tech 2 to the data link connector (DLC).
26. Turn ON the Tech 2.
27. Turn ON the ignition, with the engine OFF.
28. Select Service Programming.
IMPORTANT: DO NOT turn OFF the ignition if the programming procedure is interrupted or unsuccessful. Ensure that all the PCM and DLC
