Nearly 30 years of obsessively cataloging, photographing, and taking video of each part means it will fit your 1999 GMC Sierra Models with 4.8L Engine and square-shaped Melco Ignition Coil Ignition Coil Set.
Period. No Hassle. GUARANTEED.
We cover round trip shipping if we make a mistake.
Check out the video below to view the Guaranteed Exact Fit process from start to finish!