RB_Trucker
Full Access Member
Got a chance to do the spark plugs and wires in my 2019 Suburban. I do have the 5.3. I went with my usual of e3 plugs which I’ve had good luck with in my past SBC Suburbans.
I installed the e3.74 plugs and oem quality wires. The old plugs in the pictures I numbered looked really good for the miles and the gap didn’t change much, I do have AFM enabled also. truck has been run on 91 Chevron/Shell California fuel since day 1 and has been BB tuned since 6k miles.
Took a bit of arm power to back off the OEM plugs, the hardest part was plug #6 (passenger side) and pulling the plug boots off the plugs they were on pretty good. I ended up breaking a few wires. The boots for the coils came off easily.
Install was perfect, I used the CRC aerosol dielectric grease in both ends of the wires.
I put everything back together, 15-16 or so foot pounds (or snug) for the spark plug torque. Make sure to push the boots till you hear/feel a “click”.
Tip: You do want to have some pretty long extensions and a wiggle joint for some spots. And spark plug wire removal tool.
Fender wells came out and went back in super easy even with the wheels on. Just make sure to remember where all the screws go. Removing the wheels does make a ton more room. I just didn’t want to do that this time.
As for results, she started right up very quickly. I double checked everything she idles a little lower and smoother, and the power is definitely back to where it was.
Overall, the install wasn’t any different than any 2001 to current GM SUV.
I installed the e3.74 plugs and oem quality wires. The old plugs in the pictures I numbered looked really good for the miles and the gap didn’t change much, I do have AFM enabled also. truck has been run on 91 Chevron/Shell California fuel since day 1 and has been BB tuned since 6k miles.
Took a bit of arm power to back off the OEM plugs, the hardest part was plug #6 (passenger side) and pulling the plug boots off the plugs they were on pretty good. I ended up breaking a few wires. The boots for the coils came off easily.
Install was perfect, I used the CRC aerosol dielectric grease in both ends of the wires.
I put everything back together, 15-16 or so foot pounds (or snug) for the spark plug torque. Make sure to push the boots till you hear/feel a “click”.
Tip: You do want to have some pretty long extensions and a wiggle joint for some spots. And spark plug wire removal tool.
Fender wells came out and went back in super easy even with the wheels on. Just make sure to remember where all the screws go. Removing the wheels does make a ton more room. I just didn’t want to do that this time.
As for results, she started right up very quickly. I double checked everything she idles a little lower and smoother, and the power is definitely back to where it was.
Overall, the install wasn’t any different than any 2001 to current GM SUV.
