No it didn't mess with any lighting or electrical systems that i could tell. Mine literally only made that noise at hot idle in park or neutral, drop it in gear or race the engine the noise went away.
Yes, thats the exact noise my truck was making, hasnt come back since they replaced the alternator
I have a question for you guys that work on these everyday, i personally work on Mercedes for a living. Anyways i have a 2018 1500 with the 6 speed, currently has 12k on it, i purchased it new and pretty much ever since day one it has had a shudder, sometimes a more abrupt jerk when gently accelerating, but usually just a soft shudder sensation. Happens usually from 50-80 and only when the torque converter is locked up, press pedal down a hair more TC will unlock and shudder/jerk will go away. I have complained about it twice at the dealer, they say "operating as designed". My question is if there is a fix for this, or would even a new converter have a slight shudder to it, is it really the nature of the beast? thanks
Thats correct, my SLT has the premium package, not the premium plus package so i did not get the full led headlights. This is where my question comes from, because i have seen other trucks with the same headlights as mine, and their DRL light shuts off when the regular incandescent turn signal bulb is flashing. So im just curious as to why mine does not.
I have noticed on other trucks similar to mine that when the one of the turn signals is activated, the corresponded daytime running led portion of the headlight shuts off. My truck is a SLT and does not have the full LED headlights, mine has the regular orange bulbs for the turn signals with xenon headlights. Anyways on my truck the daytime running light stays on when i activate the turn signal, unlike others that i see on the road. Anyone have any clues to why that is, is it a programming glitch? I purchased my truck new, only modification i have done is install a jumper diode to run the fogs with the high beams, and another to run the cargo lights with the exterior puddle lights, could those diodes have an affect on the DRL's staying on when the turn signals are on? I only noticed this cause i can see the reflection in the vehicle in front of me during the daytime, headlights not on, and headlight switch stays in the auto position. Thanks
Mine had a noise very similar to this, it was the alternator, dealer replaced under new car warranty. Try removing the belt and running the engine for a short amount of time(less than 1-2 min) to see if the noise goes away.
My 2018 5.3 was seeping oil in that area, they pulled the lower oil pan and re-sealed it. It doesnt leak anymore but the tech was very sloppy with the grey sealant, crazy excessive amounts of sealant from the edges and around bolt holes.
Price lowered to 850.00 Message me if interested. Thank you
Selling a like new GM borla performance exhaust system. I had it installed on my truck for about 500 miles and removed it, just wasn’t the sound i was looking for, looking for something a bit more aggressive. Will fit all 14-18 5.3 trucks either crew cab short bed or extended cab long bed. This is the dual side exit setup. And comes with set of the borla chrome tips with all hardware needed. Im located in Jacksonville FL and will travel to meet if someone is interested up to 50 miles one way. Shipping would prolly be a killer on something of this size. Message me if your interested, thank you 1000 with the tips included Stewart
Just wanted to give an update to this high pitch whistle noise i was having, the dealership found it was in fact the alternator, that fixed the issue i was having after they installed a new one. Thanks for the input
Hey guys and gals, new member, purchased my 2018 GMC Sierra Z71 5.3 6-speed new off the lot a few months back. Been doing lots of reading on here, lots of good info on here so thanks for that! Anyways, over the past few thousand miles i have noticed 3 things that kind of bother me, otherwise i love the truck. When the truck is sitting idle in park i can hear a fairly loud high pitched whistle or whine noise from the engine if i'am standing outside the truck in front of the radiator. Sounds like a cricket or dog whistle almost, but doesnt stay steady, it changes pitch and goes away if engine is raced. It seems to be only when the truck has warmed up, i dont notice it after a cold start. Seems loudest new the alternator, maybe whine from alt or pulley, small vacuum leak, not sure really? My other two concerns are a hard downshift when slowing down quickly, it shifts down from 3-2 pretty hard at times, also the v4/v8 flap valve on the exhaust rattles loudly when at idle. I stopped by the dealer i purchased it from and expressed my concerns with the service manager, he heard the high pitch whine or whistle noise, but said he'd never heard that noise before, and he said he wasnt even sure if they would be able to repair with, which kind of make me question their ability. He heard the rattle from exhaust valve, and ordered a new exhaust, he said they would try and look into the high pitched noise when i return to have exhaust installed. As for the hard downshift he stated this was normal and nothing could be done about this, basically stated they all did it, normal operation. Has anyone hear experienced a high pitched noise similar to what i described above? Anyone had any success getting that 3-2 downshift smoothed out on the 6 speed, lots of info on the 8 speed, not so much for the 6 from what i can tell? Thanks!
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