Ok I put the JBL GTO 329 speakers in the dash yesterday and they sound great. The highs now come from the dash and they are crystal clear. I tested new vs old when i had just one side installed and there was no comparison in the sound quality. There was some cutting by hand with a Sawzall blade and I had to destroy the old speakers to use their connectors on the new speaker. It's not too pretty under the speakers and grills, but they are in tight (one screw and crammed in) and all the hacking is invisible once the grills are re-installed. I will never go back to stock speakers and now I have the capability to install a powerful amplifier in the future if I so choose. You can see the size difference of the 3-1/2 vs. the 2-3/4 speaker and the vocals and highs are loud and clear from the dash. The original capacitors cut too much of the lows out so I installed the included JBL capacitors.
I have not yet, but I plan to soon. I still have the treble set pretty high and midrange set low when I listen. It's probably because the speakers are low in the doors and the dash speakers are really shallow and scratchy sounding. When I put a thick magazines over the dash speakers it allows the door speaker's midrange to be turned up and sound great, but I still want the dash speakers replaced. My concern is that they are not 3-1/2" holes and i want to install JBL 3-1/2 inchers that have mids and highs. Anybody get 3-1/2 's in they're dash? https://www.ebay.com/itm/JBL-GTO329-3-5-150W-GTO-SERIES-2-WAY-CAR-AUDIO-STEREO-SPEAKERS-SET/171765291947?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160908105057%26meid%3Ddcf3c25fcbde4b2c946ce4c5a8b81f9a%26pid%3D100675%26rk%3D5%26rkt%3D15%26mehot%3Dpp%26sd%3D293612571402%26itm%3D171765291947%26pmt%3D0%26noa%3D1%26pg%3D2380057%26brand%3DJBL&_trksid=p2380057.c100675.m4236&_trkparms=pageci%3Af4ef422c-b280-11ea-a0b0-74dbd180c0ae|parentrq%3Aced1c0431720a9c42def92f6fff70fee|iid%3A1 https://www.pioneerelectronics.com/PUSA/Car/Speakers/PRO+Series/TS-6900PRO
I installed JBL GTO speakers in both doors (front 6 x 9) (rear 6-1/2) of my LT. I also used peel and seal roofing over all holes in door possible with double layers on large openings, but I didn't remove the moisture barrier. I also did this around the speaker adapters which are thin plastic and don't fit tightly. The Truck sounds so much better with deep bass and these low ohm speakers get very loud with the stock radio. FYI The rear speakers only add a little extra bass so if you do just the fronts your may be more than satisfied with that. https://www.lowes.com/pd/Peel-Seal-Instant-Waterproof-Repairs-6-in-x-25-ft-Aluminum-Roll-Flashing/1018733 https://www.ebay.com/itm/JBL-GTO629-6-5-360W-2-WAY-COAXIAL-CAR-AUDIO-STEREO-SPEAKERS-SET/191358505852?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 https://www.ebay.com/itm/2pcs-Door-Speaker-Adapter-6-5-or-6-75-for-Buick-Cadillac-Chevrolet-GMC-Saturn/123212506609?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 https://www.ebay.com/itm/American-International-SH3802-Gm-Suv-Truck-Door-Speaker-Harness-2014-Up/401755313036?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 https://www.ebay.com/itm/BRAND-NEW-JBL-GTO939-6X9-600W-3-OHM-3-WAY-FULL-RANGE-CAR-AUDIO-STEREO-SPEAKERS/391356632072?epid=217513263&hash=item5b1eac4c08:g:RPkAAOSwTglYkhoW https://www.ebay.com/itm/Chevy-Colorado-2015-2018-Front-Door-to-6x9-Aftermarket-Speaker-Adapter-Plate/312872782667?hash=item48d8abcb4b:g:ZBoAAOSw0lRd5sHW
I tried the flapper clamped open and I feel that the throttle was a little dead off the line like that so I unclamped it and the response returned. I'll wait for a programmer especially one that lets you adjust the rev limiter/ shift points. The truck shifts way too soon. My 07 with a 4.8 and 35 inch tires was shifting north of 6k and it really woke up above 5000 rpm.
From the looks of the instructions and the kit's new harness a simple cut and splice and then the fog lights would receive power from the headlight. Per the instructions you disconnect the factory plug to the headlight and plug it into the new harness which another plug on the new harness then plugs into the head light. Being that everything is LED. I'm thinking that the amp draw may not be an issue.
I purchased mine on Ebay for $189.00 and I just don't feel that comfortable with all that hacking into the electrical systems on the truck. I installed the lights on the truck immediately just for the looks and I'm really considering just connecting them to the headlights. I never shut the fog lights off in my Mustang so I don't imagine I would in my truck either. If you look at the instructions one should be able to modify the new harness to use the power from the right headlight to have them come on with that headlight. My only concern is that the fuse may blow and I should add a relay to prevent that. The hacking into the electrical would be much less involved for those who would say you are still hacking into the electric.
Go with some extensions until more options are available. I have Rancho 9000 adjustable and love them. I usually leave them set on 2 and adjust them accordingly for towing or Home Depot runs. The truck feels much more stable and the ride in back is better than the semi stiff Eibachs I have in front. https://www.gorancho.com/products/shock-absorbers/rs9000xl-shock-absorber/rancho-rs9000xl-shock-absorber-rs999198.html https://www.carid.com/2019-chevy-silverado-1500-suspension-systems/supreme-suspensions-pro-series-shock-absorber-extension-set-2557010241.html?parentsubmodel=WHEEL+DRIVE|4WD+(Four+Wheel+Drive)
So far I only have found that the GM cold air intake is California Legal. California is every other year so I may buy the K&N and hope they get the EO number for it or swap it out with the stock one when it's time to smog it.
Great post. I'm Considering just the speaker swap for now. Did you listen to the system with just the front speakers swapped? I will eventually get a sub, but I know the stock front speakers need more punch.
I still own a 2000 Mustang GT with a Kenne Bell Twin Screw 2.1 kit and recently replaced the Flowmasters with some quieter mufflers because it was just too loud. They were the first mod I did to the car back in 2000 and now I'm a little older and wanted to hear the radio. I do remember Ford made mufflers for the old FR500 Mustang M-5230-M58 that were quiet until you open it up and a flapper inside the muffler would activate. I would definitely consider something like that for my 19 Silverado. Nice and subdued until you get a little rowdy.
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