GMC Yukon XL 1500 no power and backfiring when accelerating due to spark plug wire short on cylinder 7 on GMC Yukon XL 1500

Some GMC Yukon XL 1500 owners report experiencing a lack of power and backfiring noises while accelerating, which may be attributed to a spark plug wire short on cylinder 7. These issues can disrupt the proper ignition process in the engine, leading to misfires and further performance problems. Owners are advised to inspect the spark plug wire on cylinder 7 for any visible damage or signs of a short, as replacing a damaged wire can help restore proper engine performance and eliminate these symptoms.