I did a coolant flush on my 5.3 '03 Sierra and changed the fluid from green to Prestone orange coolant. I had mild overheating issues prior to the flush, so I figured flushing the coolant and changing to orange Prestone might help (I did the same exact thing in my '04 GTO with LS1 and haven't had overheating issues since forever).
Now the temp always goes above midway, and here's the thing... It does the same thing even on the HIGHWAY with fans on high speed, and it sometimes goes down in traffic only (basically when I'm not giving the engine any acceleration).
I changed the coolant again with dexcool, and did an air bleed, changed the temp sensor and thermostat two months ago, and cannot see any leak from the pump but still nothing is helping.
I'll note that the green coolant didn't look dirty when it I flushed it out, and that it only heats up when I'm accelerating.
Im sure this might have been covered someplace else but i couldnt find it. I have a 2015 gmc sierra 2500hd sle. The person who owned it before me installed cheap aftermarket tow mirrors and they jiggle all over the place on the highway. I would like to get some better quality mirrors. I'm just wondering if my truck supports the marker lights, blinkers, and reverse/cargo lights plug and play without making my own connections.
Yes i just bought a 2015 gmc sierra in kentucky and the truck after purchase turns out the truck was from canada and i bass fish and when at the ramp i need to be able to turn my headlights off but apparently they have a law where the headlights stay on. Is this a programmed thing or is there something i can do to fix them. Any help would be much appreciated.
By Joey Likes GM Trucks
Hey guys, this is a officially my first post on this forum as a member!
I've recently got my exhaust done for my 2007 GMC Sierra 2500HD Classic that I recently bought about 3 months ago now. I decided I wanted it pretty loud with a deep rumble with a good amount of drone but not obnoxious and screamy. I did a lot of research on a true dual setup and read that it would be louder than your standard single in dual out muffler. So I decided to have 2 Flowmaster Original 40 series mufflers installed with dual 2.5 inch pipes in and out coming out of the sides 45 degrees with 4x18" chrome slash cut tips.
It's not giving me the volume and tone I was expecting, hearing how the 6.0 is a very noisy and loud engine to quiet down. It's barely louder than stock single exhaust on idle. I was thinking of taking it to another exhaust shop and having them run 3" pipes instead of 2.5" pipes since stock pipes are already dual 3", swapping out the original 40's and replacing them with super 44's. I hear that the 44's are more deeper and aggressive than all the 40 series that Flowmaster has to offer. I'm not really a big fan of the single chamber mufflers and straight through mufflers as they just sound too tinny and way to aggressive for my taste. I'm also aware that adding headers would really help, but I've seen videos of these things with stock manifolds and cats and they are VERY loud with the 2-chambered Flowmasters. Here's a list of things that I'm not happy about and a list of things I think I'm thinking of doing. It be really cool if you guys can share your knowledge and experiences with me to give me advice on what I should do.
- Start up isn't very impressive (I feel like its sounds more like Flowmaster moderate sounding mufflers like the 50 series)
- I get none of this "dreaded and obnoxious interior drone" the 6.0 is infamously known for, especially with the 40 series installed. Cruising in the city, it's not much louder than the stock muffler even when accelerating. It does drone just a little bit when going up hills or inclines though. (I'd love to have a decent amount of drone)
- Not impressed by the exterior sound. I had my friend drive it as I stood outside and it was not loud at all, though it did have a nice sound to it. It had more of a moderate volume, sounding more like today's newer trucks with the stock duals that come with them. (I'd love to get a really loud deep rumble with a good amount of aggressiveness.)
- The guy who did my exhaust seemed to have added 2.25" 40's instead of 2.5" but he stretched the inlet and outlet out to 2.5 inches, but still looks like there's a 2.25" choke point restricting the flow, but I don't know if that has an affect.
- He welded my tips on weird, welding 10" of the pipe itself inside the tips
What I'm thinking of doing:
- Swapping out the 2.5 inch pipes with 3" pipes (I heard pipe diameter and muffler choice really have an affect on volume and tone)
-Swapping the original 40's for 2 Flowmaster Super 44's
- Adding an H-pipe
- Put the mufflers as close to the cab as possible to increase cab resonance.
Will the Flowmaster Super 44's and dual 3" pipes have an effect on volume then what I have already?
What do you guys think? Let me know!
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