Other information:
If the vehicle has the Duramax diesel engine, see the Duramax diesel supplement.
Caution
Do not run the engine if there is a leak in the engine cooling system.
This can cause a loss of all coolant and can damage the system and vehicle. Have
any leaks fixed right away...
Vehicles equipped with Keyless Access have pushbutton starting.
The Remote Keyless Entry (RKE) transmitter must be in the vehicle for the system
to operate. If the pushbutton start is not working, the vehicle may be near a strong
radio antenna signal causing interference to the Keyless Access system...
.