ACDelco Professional 9748UU Spark Plug Wire, Pack of 8

Were of good quality, although slightly shorter than the factory but not an issue.

Good product. Came in some Asian box. Worked fine, so I can’t complain.

Received as ordered. Thank you.

Read a prior post from “Rob” that indicated these cables (9748uu) were comparable to the 748uu that my suburban called for and decided to try them out. I also checked EBay and their site indicated that these cables would fit just fine.They fit perfectly on my 2011 Chevy Suburban 1500 LS (5.3L). Great value! Give them a shot!

Perfect fit, came with enough dielectric grease to do a good job. Truck has more power and response with new plugs and wires. Even iridium plugs lose punch after 60,000 miles. Highly recommend.

At first I was a bit concerned about the different languages on the box, that they might be counterfeit. Then I found out that ACdelco is made in different countries also. Beside that, they work fine on my 2013 sierra.

Your 4.8, 5.3 and 6.0 are race engines. These engines rely on constant adjustments from multiple modules and sensors. The constants that the ECM relies upon are things like spark plug performance at exactly factory performance levels.Sure, some aftermarket plugs and wires perform just fine. But, in my book, why roll the dice.Also, do not discard nor damage the factory heat shields. They are reusable and very important if you want your new wires to last. Use a line pliers to grab the plug wire at the top of the boot and pry on the exhaust manifold after twisting the plug wire left to right and right to left a few times to help loosen the old wires.Last tip; buy a 1" extension OR put a socket on the back of your spark plug wrench if you want to change plug #8. Or...you will curse like a drunken sailor with terrets syndrome.Now, go bust some knuckles!

These went on my 2013 Caprice V8 running 67,000 kms on old plug wires.I’ve been experiencing slight engine missings at idle and also delayed throttle response. I replaced plugs first didn’t solve the problem. Replaced wires with these and issue is now resolved. Idle is smooth, throttle response improved greatly.Recommend these to anyone who have similar issues. These are good enough rather than spending more on the performance claiming wires in the market.