* Engine Control Module (ECM) and associated wiring: GM made revisions to the engine management system year to year. This means the ECM programming, sensor configurations, and wiring harnesses might differ slightly. Even seemingly minor changes in sensor types or their locations can alter the wiring diagram.
* Emission Control Systems: Changes in emission regulations could lead to minor variations in the exhaust system components and their associated sensors and wiring.
* Minor Internal Component Revisions: While the block itself is likely very similar, there might be minor internal changes to components like the pistons, connecting rods, or valve train. These internal changes are less likely to impact the wiring diagram significantly.
Finding Wiring Diagrams:
Unfortunately, there isn't a single, easily accessible website with complete, high-resolution photos of every 1996 and 1997 Cavalier 2.2L engine wiring harness. The diagrams are usually quite complex. Your best bet for finding detailed wiring diagrams is through these sources:
1. Factory Service Manuals: These are the most accurate source. You can sometimes find them online through used booksellers (eBay, Amazon), or specialized automotive repair manual providers. These manuals often include detailed wiring diagrams.
2. Online Repair Databases (Subscription Services): Sites like AllDataDIY or Mitchell1 offer access to factory-level repair information, including wiring diagrams, for a subscription fee. These are excellent resources if you plan on doing significant car repair work.
3. Haynes or Chilton Repair Manuals: These are more affordable than factory manuals, but the wiring diagrams are usually less detailed. Still, they can provide a general overview.
4. AutoZone, Advance Auto Parts, etc.: Some auto parts stores may have access to wiring diagrams through their computer systems, or they can order a repair manual for you.
Important Note: When working with automotive wiring, accuracy is paramount. Using an incorrect wiring diagram can lead to damage to your vehicle's electrical system. If you're not comfortable working with automotive electricity, it's best to consult a qualified mechanic.
