For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

California Proposition 65 WarningEngine Heater
The engine heater can provide easier starting and better fuel economy during
engine warm-up in cold weather conditions at or below −18°C (0°F). Vehicles with
an engine heater should be plugged in at least four hours before starting.
1. Turn off the engine.
2. Open the hood and unwrap ...
Special Tools
Illustration
Tool Number/Description
CH 21177
J 21177-A
Drum to Brake Shoe Clearance Gauge
CH 41013
J 41013
Rotor Resurfacing Kit
C ...
Engine Component Description
Cylinder Block
The cylinder hollow frame structured in–line 4 cylinder. The block has 5 crankshaft
bearings with the thrust bearing located on the third bearing from the front
of the engine.
Crankshaft
The crankshaft is a steel crankshaft. It is supported ...