The body control module (BCM) applies B+ to the hood ajar signal circuit and monitors the voltage to determine the position of the hood. When the hood is closed, the switch is open and voltage remains high. When the hood is open, the switch is closed and the voltage is pulled low.
The BCM uses the hood ajar switch as a content theft deterrent alarm trigger.
When the hood is ajar, a message is displayed on the DIC or the hood ajar indicator will be illuminated.
Hood Adjustment
Hood Hinge ReplacementTires
Every new GM vehicle has high-quality tires made by a leading tire manufacturer.
See the warranty manual for information regarding the tire warranty and where to
get service. For additional information refer to the tire manufacturer.
Warning
. Poorly maintained and improperly used tires are ...
Crankshaft Front Oil Seal Installation
Special Tools
EN-6351 Mounting Sleeves
For equivalent regional tools, refer to Special Tools.
Clean the sealing surfaces.
Slide the EN-6351 sleeves (2) protective sleeve onto the crankshaft
journal.
Slide the crankshaft front oil seal (1) over the protective sleev ...
Ignition Coil Replacement
Special Tools
EN-6009 Remover and Installer Ignition Coil
For equivalent regional tools, refer to Special Tools.
Removal Procedure
Remove the engine wiring harness guide (1) from the cylinder head.
Disconnect the ignition coil electrical connector (2).
...