This legal identifier is in the front corner of the instrument panel, on the driver side. It can be seen through the windshield from outside. The VIN also appears on the Vehicle Certification and Service Parts labels and certificates of title and registration.
Engine Identification
The eighth character in the VIN is the engine code.
This code identifies the vehicle's engine, specifications, and replacement parts. See “Engine Specifications” under Capacities and Specifications for the vehicle's engine code.
Chevrolet Cobalt Service & Repair Manual. Radiator, Replace
1.
Drain cooling system into a suitable
container.
2.
Remove air cleaner outlet resonator.
3.
Reposition radiator inlet hose clamp
at radiator, using hose clamp pliers tool No. J 38185 or equivalent.
...