Difficulity removing spark plug caps to replace spark plugs in 2002 GMC Yukon

Have you confirmed that its not a security issue? Did it die suddenly or was it bogging out for a while? Have you scanned the engine?

Instead of spending money on parts, you should get a book and troubleshoot the circuit. It could be the pickup or the module in the distributor, or other electronic components.

Hello and welcome to FixYa!

As a first course of action, I strongly suggest that you replace the spark plugs for I suspect that you have fuel flooding.

The spark plugs fails when they are corroded, covered with carbon, have big gaps or just faulty. It's like you have fuel but not enough current to burn it down for the spark plugs is failing. Have it replaced and this could do the trick.

Hope this helps and thank you for using FixYa! Have a good one!

Follow the wires coming out of the distributor cap to the spark plugs.

Intake manifold gaskets leaking internally.

45 - 50 ilbs.

Probably engine is misfiring. Check spark plugs and wires. Check distributor cap and rotor.
Check spark at plugs. Should be a blue spark and not yellow. A yellow spark is weak ignition coil.

YOU NEED A SPARK PLUG BOOT PULLER TO REMOVE PLUGS WIRES.

Possibly bad spark plug wires.

how to take spark plug wires off 2003 yukon xl