General Steps (with caveats):
Before you start, disconnect the negative battery terminal to prevent electrical shorts. You'll also want basic tools: spark plug socket (usually 5/8" for most GM vehicles, but double-check!), ratchet, extension(s), and possibly a swivel. Gloves are a good idea too, as spark plugs can be dirty.
* Locate the Engine: Open the hood and identify your engine. The spark plugs are on top of the engine, but accessing them can vary widely.
* 4.3L V6: This engine usually has relatively easy access to the spark plugs, though you may need to remove some components for better reach. You'll likely need to:
* Remove the air intake system: This often involves detaching hoses and possibly the air filter housing.
* Possibly remove the ignition coil packs: These are often held on by bolts and need to be carefully removed. Remember which coil goes where, or take pictures.
* Access the spark plugs: Once the coils are out, the plugs should be visible.
* 5.7L V8: This engine presents a more challenging task. The process is similar in principle but generally requires more maneuvering and potentially more parts removal. You'll likely encounter the same steps as the 4.3L, plus potentially:
* Removing additional components: Expect to possibly remove more hoses, wires, brackets, or even parts of the intake manifold for better access. This will require more time and precision.
* More clearance issues: The tighter space around the V8's spark plugs often necessitates more careful use of extensions and a swivel socket.
Crucial Information Needed:
* Engine Size (4.3L V6 or 5.7L V8, or other): This is absolutely essential for providing accurate instructions.
* Repair Manual: A repair manual specific to your 2002 Chevrolet Safari's engine is highly recommended. These manuals provide detailed diagrams and steps. You can find them online (like Chilton or Haynes) or at auto parts stores.
Safety Precautions:
* Never work on a hot engine. Allow the engine to cool completely before starting any work.
* Be careful not to drop anything into the engine. This can cause serious damage.
* Use the correct size socket. A damaged spark plug socket can strip the plug.
* Always ground yourself before working on anything electrical.
Without knowing your engine size, this is the most general advice I can offer. Please provide the engine displacement to get more specific instructions. Attempting this without the correct information and tools could lead to damage or injury.
