kcorbin

Adding myself to the list of trucks with vibration issues. I have a 2014 Sierra A/T SLT 5.3L with about 1800 miles on it. It developed a gas pedal / floorboard vibration at around 1000 miles. Mine doesn't seem to have any relation to speed, but rather engine RPM and throttle. I get a sporadic (though becoming more common) pedal vibration most noticeable between 1k and 1250 RPM under light throttle. The vibration comes and goes in severity, but at its worst, it is almost numbing on the foot. It seems like engaging the 4wd in 4 auto makes it more consistently present. I also noticed that under similar conditions (low RPM, light throttle), in cruising and trying to maintain speed on an incline, my truck will surge or pulse in providing power and you can actually see the tach bouncing and it will continue until i let off the throttle or press hard enough to downshift. The vibration is present during this as well. I had the truck at the selling dealer to look at the vibration back around 1000 miles. I got the usual response that they noticed it and then took out a nearly identical Sierra, new on the lot, and it did the same thing. They didn't offer any further help, but said it's operating as designed. I'm debating pursuing this further with the Chevy dealer I had used with my 2008 Silverado. The 5.3/4spd in that truck was much more predictable and smooth at all speeds and throttle--kinda like my Sierra was the first few hundred miles. Anybody have any thoughts / advice in moving forward with this?

Looks to be the same as the TRS Mopar Low beam kit that has been referenced on here a few times. I'd imagine they just re-listed it under the Sierra name with just the 9012 bulb options available for clarity.

Thanks Chris -- Do you know the position of the wire on the HID bulb as you have them installed? My cutoff looks pretty clean on buildings. The picture was taken very close to the headlight just to capture any bright or dark spots. I have several minor shadows across the beam on the ground in the dark

Hi All -- I've had my 2014 Sierra SLT All Terrain for about 4 weeks now. My post-LASIK eyes are particularly sensitive to having sufficient light at night, and accordingly I decided to try an HID bulb kit. I installed the TRS 35W 4300k kit over the weekend and thought I'd share my experience. I decided that I'd modify the TRS harness to allow installation of the relays and the majority of the wiring on the driver’s side. I extended the power lead and placed it in split loom attached (zip tied) to the other wire loom that runs above the firewall. I then tied in to the power distribution box that sits on top of the battery. There was a spare bolt location available, so I used a spare metric nut to attach there. I also extended the cap link and driver's side ballast ground wires to the factory grounding location at the top of the firewall. I grounded the passenger side under the support bar at the front. Measured resistance at that location compared to the factory ground was about a wash, but i figured i'd be able to run to the negative terminal if it was a problem. Both ballasts are mounted on the rad support frame on each respective side. After getting everything connected, I powered up the lights and everything worked fine. I turned on the engine and the relays started toggling (buzzing). I had forgotten to flip the OEM connector for the reverse polarity, though I'm not sure why the engine running made a difference. The light output is certainly an improvement, though the pattern and shadows are kind of annoying. Can the 9012 bulbs be inserted in multiple positions? I didn't really pay attention to whether or not there were multiple options at the time, as i figured a proper 9012 would only allow one direction. I took a picture of the output from the projector (below). This is immediately out of the projector from about a foot in front of the headlight. The shadows are pretty obvious in the output, though the cut off looks OK at a distance. Not sure if there is an orientation problem or if this is what the output in the halogen projectors looks like. I also noticed that there is a ~.5 to 1 sec delay between the two bulbs firing and powering off. I assume this is just the nature of a single-input relay harness and the extended run to the second ballast. Have others seen this as well? As far as radio reception goes, I noticed that a weak station is completely lost when turning on the headlights. If there is any noted static, the station will be gone. This is unfortunately many stations given the already weak reception on these radios. I'm only 20 miles outside of pittsburgh and I get static on most local stations. I usually listen to XM though.