GMTfour100

Of course, that's understandable. My concern is why only the REAR doors were filled with water, while the front doors were totally fine?

2013 Silverado Crew Cab After raining for a week, I could hear water swishing around when I hit the brakes or accelerated. I saw some water dribbling out of the rear doors... I pulled back the lower/bottom weather seal and water started literally peeing out of the push-pin fastener holes. The front doors are bone dry. Each door also has two rectangular drains/plugs... I've pulled out the plugs to help drain in the future, but how is water getting in there??

Okay, after doing some digging… I see that the 1500 has 330mm/345mm (front/rear) rotors, while the 2500HD used 350mm/360mm (front/rear) rotors. Just need to figure out if the bolt pattern is the same, the caliper size and mounting bracket specs.

Does anyone know if/how it’s possible to retrofit bigger rotors/calipers on 2014-2019 Silverado/Sierra? Maybe from the 2020-2022? Otherwise, are the rotors and calipers on the 2014-2019 Silverado/Sierra the same on both the 1500 and 2500? If bigger, would they fit? (btw on my 2001 Yukon, I easily bolted on bigger front rotors and calipers from a 2007-2013 Tahoe/Yukon/Suburban, and it made a HUGE difference, especially with bigger tires).

Hello all, Wondering if anyone can help me figure out which lift kit to purchase in order to lift my 2001 Yukon XL 4x4 with Autoride. Id like to retain Autoride functionality, but almost all the kits require doing an Autoride delete. Will Rough Country or Supreme Suspension kits work if I also get some shock extenders and relocation brackets for the rear? Need help. Thank you in advance.

Indeed that’s what I’ve always heard to, until I read maintenance specs of replacing coils every 100k miles, which lead me down a road of different coil types. The real question here (regardless of whether coils need replacement prior to failure) is whether the “newer design” round D585 coils improve performance and/or gas mileage, compared to the square D581 coils. Hopefully someone who knows will chime in.

Ahh okay thanks. I thought I read somewhere that ignition coils should be replaced every 100k miles. My truck has 150k miles in original coil packs. So if they are working, they don’t need to be replaced? And they’re firing just as well as brand new ones?

Bump... Nobody here knows the differences between these two coil pack types? ..Really?

Doing a tune up on a 2001 Yukon XL. Is it possible to swap round coils into a truck that came with the square ones? My 2001 Yukon XL came with the square coils (D581), however, I understand that the newer design coils (D585) are a bit "hotter" and began getting installed into Chevy/GMC trucks in 2003 (which is why many people swap them into LS motors). O'Reilly Auto, Amazon, Ebay, etc.. all state that both types of coils will fit my truck (00-02 GMC/Chevy). I know that the round (D585) coils will require slightly longer plug wires [9748GG vs the 9748HH for the square (D581) coils]. Does anyone know if I can just swap these into my truck or will I need a different mounting bracket for each side of the motor? (part 10457736). Thanks in advance to anyone who chimes in.