79Mercy

I preferred the Matte finish wood from the Denali models, so thats what i installed in mine

Selling complete wood kit with center console unit, removed from my 2018 Sierra crew cab with 18,000 miles, no scratches or damage to any of the trims. I swapped out the wood in my truck for different style trim. Please message me if interested, asking 325.00 plus shipping. Thank you. Located in Jacksonville FL. Center console has all usb plugs, 2 12v outlets and the 110v outlet still installed.

The new compressor would come pre charged? Not sure who told you that false information, but that doesnt make any sense. On the other hand, did your system lose all of its freon? If not then they will be able to re-cover your existing refrigerant charge, perform the needed repairs, and then re-charge the system with the same stuff they took out. If the truck is still fully charged with freon then you shouldnt have to buy freon at all. btw, i highly doubt the dealer is going to use what freon you supply, they are going to use their machine and charge you as needed.

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

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

My 2018 5.3 will drop to 15 psi at hot idle after it gets good and hot, usually after a run on the highway in FL heat. Im assuming its normal operation considering how thin the oil is required to be.

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!