Hummer H1 Service Manual page 306

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Step
9
1. After the repair is complete, use the scan tool to
select "DTC," then "Clear in fold function.
2. Select "Specific DTC" and enter DTC "P1810."
3. Operate the vehicle under the following condi-
tions:
• Turn the ignition switch "on" for at least 2 sec-
onds. Then start vehicle, idle for 5 seconds, then
drive vehicle in D4 until converter clutch locks
for 20 seconds.
05745159
DTC P1810 Pressure Switch Circuit Fault (Cont'd)
Action
Transmission/Transfer Case
Value
—
5-107
Yes No
Repair veri-
fied, exist
— DTC table.