Owners manual, positive.
Depending on what type engine you have, the ignition module may be an integral part of the distributor cap.
The 1990 Chevy Celebrity engine is distributorless, the ignition is handled by a combination of the engine control module(computer) and the ignition control module. You did not mention which engine the car has. If your car has the 4 cylinder engine the ignition control module is below the intake manifold at the rear of the engine. You can follow the spark plug wires to it. The coils are mounted to the ignition control module. If your car has the V6 the ignition control module is near the starter and again you can follow the spark plug wires to it. Again the coils are mounted to the ignition control module.
Try the following link. You can get any vehicle diagram. The fees are reasonable. I bought the entire wiring diagram for my blazer. http://www.ahdol.com/
10 degrees
1-6-5-4-3-2
Ignition control device
Electronic ignition is a system used in internal combustion engines that replaces traditional mechanical ignition systems. It uses electronic components to control the timing and duration of the spark that ignites the air-fuel mixture in the engine's cylinders. This system typically includes sensors to monitor engine conditions, a control unit to process the data, and ignition coils to produce the spark. By providing more precise control over ignition timing, electronic ignition enhances engine efficiency, performance, and emissions control.
wiil a 1999 blazer engine fit a 2002 blazer
On a 1989 Chevy Blazer, the ignition coil is typically mounted on the engine's intake manifold, near the front of the engine. It is usually located close to the distributor cap and connected to the ignition system. For easier access, you may need to remove any covers or components obstructing it. Always refer to a repair manual for specific guidance related to your vehicle's configuration.
The Ignition Control Module is on the top left hand side of the engine under the Ignition Coils.
Where can I find a engine schematic on line, for a 1999 Oldsmobile Intrigue 3.5 V6.
what is the engine control switch feed wire on a distributer