Hummer H1 Service Manual page 1141

76 PCM/Tech 1 Scan Tool
DTC P0251 - Injection Pump Cam System
Step
16 1. Using the Scan Tool, select "DTC", "Clear Info".
2. Start engine and idle at normal operating temperature.
3. Select "DTC", "Specific", then enter the DTC number which was set.
4. Operate vehicle within the conditions for setting this DTC.
Does the Scan Tool indicate that this diagnostic Ran and Passed?
17 Using the Scan Tool, select "Capture Info", "Review Info".
Are any DTCs displayed that have not been diagnosed?
_____________________________________________________
Action Value(s) Yes
— Go to Step 17. Go to Step 2.
— Go to DTC
table
®
No
System OK.